diff --git a/monkey/monkey_island/Pipfile b/monkey/monkey_island/Pipfile
index ee3bdd71a..8b85a58a1 100644
--- a/monkey/monkey_island/Pipfile
+++ b/monkey/monkey_island/Pipfile
@@ -34,6 +34,7 @@ pymongo = "*"
 cryptography = "*"
 semantic-version = "*"
 pypubsub = "*"
+pydantic = "*"
 
 [dev-packages]
 virtualenv = ">=20.0.26"
diff --git a/monkey/monkey_island/Pipfile.lock b/monkey/monkey_island/Pipfile.lock
index 0ac6b6c49..c5c7d2c47 100644
--- a/monkey/monkey_island/Pipfile.lock
+++ b/monkey/monkey_island/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "82ce85b7c4c14c663026a659d3f35f869af944ba5dd52ed8cfe6ff83b20e9633"
+            "sha256": "2793120cfe1c233af7954e784b18ea46fbb8a0630dc1df7f8f977ae0dc5d7c52"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -540,6 +540,47 @@
             ],
             "version": "==2.21"
         },
+        "pydantic": {
+            "hashes": [
+                "sha256:1061c6ee6204f4f5a27133126854948e3b3d51fcc16ead2e5d04378c199b2f44",
+                "sha256:19b5686387ea0d1ea52ecc4cffb71abb21702c5e5b2ac626fd4dbaa0834aa49d",
+                "sha256:2bd446bdb7755c3a94e56d7bdfd3ee92396070efa8ef3a34fab9579fe6aa1d84",
+                "sha256:328558c9f2eed77bd8fffad3cef39dbbe3edc7044517f4625a769d45d4cf7555",
+                "sha256:32e0b4fb13ad4db4058a7c3c80e2569adbd810c25e6ca3bbd8b2a9cc2cc871d7",
+                "sha256:3ee0d69b2a5b341fc7927e92cae7ddcfd95e624dfc4870b32a85568bd65e6131",
+                "sha256:4aafd4e55e8ad5bd1b19572ea2df546ccace7945853832bb99422a79c70ce9b8",
+                "sha256:4b3946f87e5cef3ba2e7bd3a4eb5a20385fe36521d6cc1ebf3c08a6697c6cfb3",
+                "sha256:4de71c718c9756d679420c69f216776c2e977459f77e8f679a4a961dc7304a56",
+                "sha256:5565a49effe38d51882cb7bac18bda013cdb34d80ac336428e8908f0b72499b0",
+                "sha256:5803ad846cdd1ed0d97eb00292b870c29c1f03732a010e66908ff48a762f20e4",
+                "sha256:5da164119602212a3fe7e3bc08911a89db4710ae51444b4224c2382fd09ad453",
+                "sha256:615661bfc37e82ac677543704437ff737418e4ea04bef9cf11c6d27346606044",
+                "sha256:78a4d6bdfd116a559aeec9a4cfe77dda62acc6233f8b56a716edad2651023e5e",
+                "sha256:7d0f183b305629765910eaad707800d2f47c6ac5bcfb8c6397abdc30b69eeb15",
+                "sha256:7ead3cd020d526f75b4188e0a8d71c0dbbe1b4b6b5dc0ea775a93aca16256aeb",
+                "sha256:84d76ecc908d917f4684b354a39fd885d69dd0491be175f3465fe4b59811c001",
+                "sha256:8cb0bc509bfb71305d7a59d00163d5f9fc4530f0881ea32c74ff4f74c85f3d3d",
+                "sha256:91089b2e281713f3893cd01d8e576771cd5bfdfbff5d0ed95969f47ef6d676c3",
+                "sha256:9c9e04a6cdb7a363d7cb3ccf0efea51e0abb48e180c0d31dca8d247967d85c6e",
+                "sha256:a8c5360a0297a713b4123608a7909e6869e1b56d0e96eb0d792c27585d40757f",
+                "sha256:afacf6d2a41ed91fc631bade88b1d319c51ab5418870802cedb590b709c5ae3c",
+                "sha256:b34ba24f3e2d0b39b43f0ca62008f7ba962cff51efa56e64ee25c4af6eed987b",
+                "sha256:bd67cb2c2d9602ad159389c29e4ca964b86fa2f35c2faef54c3eb28b4efd36c8",
+                "sha256:c0f5e142ef8217019e3eef6ae1b6b55f09a7a15972958d44fbd228214cede567",
+                "sha256:cdb4272678db803ddf94caa4f94f8672e9a46bae4a44f167095e4d06fec12979",
+                "sha256:d70916235d478404a3fa8c997b003b5f33aeac4686ac1baa767234a0f8ac2326",
+                "sha256:d8ce3fb0841763a89322ea0432f1f59a2d3feae07a63ea2c958b2315e1ae8adb",
+                "sha256:e0b214e57623a535936005797567231a12d0da0c29711eb3514bc2b3cd008d0f",
+                "sha256:e631c70c9280e3129f071635b81207cad85e6c08e253539467e4ead0e5b219aa",
+                "sha256:e78578f0c7481c850d1c969aca9a65405887003484d24f6110458fb02cca7747",
+                "sha256:f0ca86b525264daa5f6b192f216a0d1e860b7383e3da1c65a1908f9c02f42801",
+                "sha256:f1a68f4f65a9ee64b6ccccb5bf7e17db07caebd2730109cb8a95863cfa9c4e55",
+                "sha256:fafe841be1103f340a24977f61dee76172e4ae5f647ab9e7fd1e1fca51524f08",
+                "sha256:ff68fc85355532ea77559ede81f35fff79a6a5543477e168ab3a381887caea76"
+            ],
+            "index": "pypi",
+            "version": "==1.9.2"
+        },
         "pyinstaller": {
             "hashes": [
                 "sha256:24035eb9fffa2e3e288b4c1c9710043819efc7203cae5c8c573bec16f4a8e98f",
@@ -833,7 +874,7 @@
                 "sha256:25642c956049920a5aa49edcdd6ab1e06d7e5d467fc00e0506c44ac86fbfca02",
                 "sha256:e6d2677a32f47fc7eb2795db1dd15c1f34eff616bcaf2cfb5e997f854fa1c4a6"
             ],
-            "markers": "python_version < '3.8'",
+            "markers": "python_version >= '3.7'",
             "version": "==4.3.0"
         },
         "urllib3": {
@@ -959,7 +1000,7 @@
                 "sha256:7614553711ee97490f732126dc077f8d0ae084ebc6a96e23db1482afabdb2c51",
                 "sha256:ff56f4892c1c4bf0d814575ea23471c230d544203c7748e8c68f0089478d48eb"
             ],
-            "markers": "python_version >= '3.6'",
+            "markers": "python_full_version >= '3.6.0'",
             "version": "==2.10.3"
         },
         "black": {
@@ -1251,7 +1292,7 @@
                 "sha256:4224373bacce55f955a878bf9cfa763c1e360858e330072059e10bad68531159",
                 "sha256:74134bbf457f031a36d68416e1509f34bd5ccc019f0bcc952c7b909d06b37bd3"
             ],
-            "markers": "python_version >= '3.6'",
+            "markers": "python_full_version >= '3.6.0'",
             "version": "==1.0.0"
         },
         "py": {
@@ -1283,7 +1324,7 @@
                 "sha256:5eb116118f9612ff1ee89ac96437bb6b49e8f04d8a13b514ba26f620208e26eb",
                 "sha256:dc9c10fb40944260f6ed4c688ece0cd2048414940f1cea51b8b226318411c519"
             ],
-            "markers": "python_version >= '3.6'",
+            "markers": "python_full_version >= '3.6.0'",
             "version": "==2.12.0"
         },
         "pyparsing": {
@@ -1407,7 +1448,7 @@
                 "sha256:d412243dfb797ae3ec2b59eca0e52dac12e75a241bf0e4eb861e450d06c6ed07",
                 "sha256:f5f8bb2d0d629f398bf47d0d69c07bc13b65f75a81ad9e2f71a63d4b7a2f6db2"
             ],
-            "markers": "python_version >= '3.6'",
+            "markers": "python_full_version >= '3.6.0'",
             "version": "==2.0.0"
         },
         "sphinxcontrib-jsmath": {
@@ -1493,7 +1534,7 @@
                 "sha256:25642c956049920a5aa49edcdd6ab1e06d7e5d467fc00e0506c44ac86fbfca02",
                 "sha256:e6d2677a32f47fc7eb2795db1dd15c1f34eff616bcaf2cfb5e997f854fa1c4a6"
             ],
-            "markers": "python_version < '3.8'",
+            "markers": "python_version >= '3.7'",
             "version": "==4.3.0"
         },
         "urllib3": {
diff --git a/monkey/monkey_island/cc/models/__init__.py b/monkey/monkey_island/cc/models/__init__.py
index 5ed812b7d..94e063a81 100644
--- a/monkey/monkey_island/cc/models/__init__.py
+++ b/monkey/monkey_island/cc/models/__init__.py
@@ -9,3 +9,7 @@ from .pba_results import PbaResults
 from monkey_island.cc.models.report.report import Report
 from .simulation import Simulation, SimulationSchema, IslandMode
 from .user_credentials import UserCredentials
+from .machine import Machine, MachineID
+from .communication_type import CommunicationType
+from .node import Node
+from .agent import Agent
diff --git a/monkey/monkey_island/cc/models/agent.py b/monkey/monkey_island/cc/models/agent.py
new file mode 100644
index 000000000..73ff8d693
--- /dev/null
+++ b/monkey/monkey_island/cc/models/agent.py
@@ -0,0 +1,18 @@
+from datetime import datetime
+from typing import Optional
+from uuid import UUID
+
+from pydantic import Field
+
+from . import MachineID
+from .base_models import MutableBaseModel
+
+
+class Agent(MutableBaseModel):
+    id: UUID = Field(..., allow_mutation=False)
+    machine_id: MachineID = Field(..., allow_mutation=False)
+    start_time: datetime = Field(..., allow_mutation=False)
+    stop_time: Optional[datetime]
+    parent_id: UUID = Field(..., allow_mutation=False)
+    cc_server: str = Field(default="")
+    log_contents: str = Field(default="")
diff --git a/monkey/monkey_island/cc/models/base_models.py b/monkey/monkey_island/cc/models/base_models.py
new file mode 100644
index 000000000..5d82be324
--- /dev/null
+++ b/monkey/monkey_island/cc/models/base_models.py
@@ -0,0 +1,51 @@
+import json
+from typing import Sequence
+
+from pydantic import BaseModel, Extra, ValidationError
+
+
+class InfectionMonkeyModelConfig:
+    underscore_attrs_are_private = True
+    extra = Extra.forbid
+
+
+class InfectionMonkeyBaseModel(BaseModel):
+    class Config(InfectionMonkeyModelConfig):
+        pass
+
+    def __init__(self, **kwargs):
+        try:
+            super().__init__(**kwargs)
+        except ValidationError as err:
+            # TLDR: This exception handler allows users of this class to be decoupled from pydantic.
+            #
+            # When validation of a pydantic object fails, pydantic raises a `ValidationError`, which
+            # is a `ValueError`, even if the real cause was a `TypeError`. Furthermore, allowing
+            # `pydantic.ValueError` to be raised would couple other modules to pydantic, which is
+            # undesirable. This exception handler re-raises the first validation error that pydantic
+            # encountered. This allows users of these models to `except` `TypeError` or `ValueError`
+            # and handle them. Pydantic-specific errors are still raised, but they inherit from
+            # `TypeError` or `ValueError`.
+            e = err.raw_errors[0]
+            while isinstance(e, Sequence):
+                e = e[0]
+
+            raise e.exc
+
+    # We need to be able to convert our models to fully simplified dictionaries. The
+    # `BaseModel.dict()` does not support this. There is a proposal to add a `simplify` keyword
+    # argument to `dict()` to support this. See
+    # https://github.com/pydantic/pydantic/issues/951#issuecomment-552463606. The hope is that we
+    # can override `dict()` with an implementation of `simplify` and remove it when the feature gets
+    # merged. If the feature doesn't get merged, or the interface is changed, this function can
+    # continue to serve as a wrapper until we can update all references to it.
+    def dict(self, simplify=False, **kwargs):
+        if simplify:
+            return json.loads(self.json())
+        return BaseModel.dict(self, **kwargs)
+
+
+class MutableBaseModel(InfectionMonkeyBaseModel):
+    class Config(InfectionMonkeyModelConfig):
+        allow_mutation = True
+        validate_assignment = True
diff --git a/monkey/monkey_island/cc/models/communication_type.py b/monkey/monkey_island/cc/models/communication_type.py
new file mode 100644
index 000000000..0991dd5de
--- /dev/null
+++ b/monkey/monkey_island/cc/models/communication_type.py
@@ -0,0 +1,15 @@
+from enum import Enum
+
+
+class CommunicationType(Enum):
+    """
+    An Enum representing different types of communication between agents and the Island
+
+    This Enum represents the different was agents can communicate with each other and with the
+    Island. The value of each member is the member's name in all lower-case characters.
+    """
+
+    SCANNED = "scanned"
+    EXPLOITED = "exploited"
+    CC = "cc"
+    CC_TUNNEL = "cc_tunnel"
diff --git a/monkey/monkey_island/cc/models/machine.py b/monkey/monkey_island/cc/models/machine.py
new file mode 100644
index 000000000..1624ff522
--- /dev/null
+++ b/monkey/monkey_island/cc/models/machine.py
@@ -0,0 +1,24 @@
+from ipaddress import IPv4Interface
+from typing import Optional, Sequence
+
+from pydantic import Field, PositiveInt, validator
+
+from common import OperatingSystems
+
+from .base_models import MutableBaseModel
+from .transforms import make_immutable_sequence
+
+MachineID = PositiveInt
+
+
+class Machine(MutableBaseModel):
+    id: MachineID = Field(..., allow_mutation=False)
+    hardware_id: Optional[PositiveInt]
+    network_interfaces: Sequence[IPv4Interface]
+    operating_system: OperatingSystems
+    operating_system_version: str
+    hostname: str
+
+    _make_immutable_sequence = validator("network_interfaces", pre=True, allow_reuse=True)(
+        make_immutable_sequence
+    )
diff --git a/monkey/monkey_island/cc/models/node.py b/monkey/monkey_island/cc/models/node.py
new file mode 100644
index 000000000..6fa307734
--- /dev/null
+++ b/monkey/monkey_island/cc/models/node.py
@@ -0,0 +1,18 @@
+from typing import Sequence, Tuple
+
+from pydantic import Field, validator
+
+from . import CommunicationType, MachineID
+from .base_models import MutableBaseModel
+from .transforms import make_immutable_nested_sequence
+
+ConnectionsSequence = Sequence[Tuple[MachineID, Sequence[CommunicationType]]]
+
+
+class Node(MutableBaseModel):
+    machine_id: MachineID = Field(..., allow_mutation=False)
+    connections: ConnectionsSequence
+
+    _make_immutable_nested_sequence = validator("connections", pre=True, allow_reuse=True)(
+        make_immutable_nested_sequence
+    )
diff --git a/monkey/monkey_island/cc/models/transforms.py b/monkey/monkey_island/cc/models/transforms.py
new file mode 100644
index 000000000..c8437c038
--- /dev/null
+++ b/monkey/monkey_island/cc/models/transforms.py
@@ -0,0 +1,36 @@
+from typing import Any, MutableSequence, Sequence, Union
+
+
+def make_immutable_nested_sequence(sequence_or_element: Union[Sequence, Any]) -> Sequence:
+    """
+    Take a Sequence of Sequences (or other types) and return an immutable copy
+
+    Takes a Sequence of Sequences, for example `List[List[int, float]]]` and returns an immutable
+    copy. Note that if the Sequence does not contain other sequences, `make_sequence_immutable()`
+    will be more performant.
+
+    :param sequence_or_element: A nested sequence or an element from within a nested sequence
+    :return: An immutable copy of the sequence if `sequence_or_element` is a Sequence, otherwise
+             just return `sequence_or_element`
+    """
+    if isinstance(sequence_or_element, str):
+        return sequence_or_element
+
+    if isinstance(sequence_or_element, Sequence):
+        return tuple(map(make_immutable_nested_sequence, sequence_or_element))
+
+    return sequence_or_element
+
+
+def make_immutable_sequence(sequence: Sequence):
+    """
+    Take a Sequence and return an immutable copy
+
+    :param sequence: A Sequence to create an immutable copy from
+    :return: An immutable copy of `sequence`
+    """
+
+    if isinstance(sequence, MutableSequence):
+        return tuple(sequence)
+
+    return sequence
diff --git a/monkey/tests/unit_tests/monkey_island/cc/models/test_agent.py b/monkey/tests/unit_tests/monkey_island/cc/models/test_agent.py
new file mode 100644
index 000000000..1851a4873
--- /dev/null
+++ b/monkey/tests/unit_tests/monkey_island/cc/models/test_agent.py
@@ -0,0 +1,133 @@
+from datetime import datetime, timezone
+from uuid import UUID
+
+import pytest
+
+from monkey_island.cc.models import Agent
+
+AGENT_ID = UUID("012e7238-7b81-4108-8c7f-0787bc3f3c10")
+PARENT_ID = UUID("0fc9afcb-1902-436b-bd5c-1ad194252484")
+
+AGENT_OBJECT_DICT = {
+    "id": AGENT_ID,
+    "machine_id": 2,
+    "parent_id": PARENT_ID,
+    "start_time": datetime.fromtimestamp(1660848408, tz=timezone.utc),
+}
+
+AGENT_SIMPLE_DICT = {
+    "id": str(AGENT_ID),
+    "machine_id": 2,
+    "parent_id": str(PARENT_ID),
+    "start_time": "2022-08-18T18:46:48+00:00",
+}
+
+
+def test_constructor__defaults_from_objects():
+    a = Agent(**AGENT_OBJECT_DICT)
+
+    assert a.stop_time is None
+    assert a.cc_server == ""
+
+
+def test_constructor__defaults_from_simple_dict():
+    a = Agent(**AGENT_SIMPLE_DICT)
+
+    assert a.stop_time is None
+    assert a.cc_server == ""
+    assert a.log_contents == ""
+
+
+def test_to_dict():
+    a = Agent(**AGENT_OBJECT_DICT)
+    agent_simple_dict = AGENT_SIMPLE_DICT.copy()
+    agent_simple_dict["stop_time"] = None
+    agent_simple_dict["cc_server"] = ""
+    agent_simple_dict["log_contents"] = ""
+
+    assert a.dict(simplify=True) == agent_simple_dict
+
+
+@pytest.mark.parametrize(
+    "key, value",
+    [
+        ("id", 1),
+        ("machine_id", "not-an-int"),
+        ("start_time", None),
+        ("stop_time", []),
+        ("parent_id", 2.1),
+        ("cc_server", []),
+        ("log_contents", None),
+    ],
+)
+def test_construct_invalid_field__type_error(key, value):
+    invalid_type_dict = AGENT_SIMPLE_DICT.copy()
+    invalid_type_dict[key] = value
+
+    with pytest.raises(TypeError):
+        Agent(**invalid_type_dict)
+
+
+@pytest.mark.parametrize(
+    "key, value",
+    [
+        ("machine_id", -1),
+        ("start_time", "not-a-datetime"),
+        ("stop_time", "not-a-datetime"),
+    ],
+)
+def test_construct_invalid_field__value_error(key, value):
+    invalid_value_dict = AGENT_SIMPLE_DICT.copy()
+    invalid_value_dict[key] = value
+
+    with pytest.raises(ValueError):
+        Agent(**invalid_value_dict)
+
+
+def test_id_immutable():
+    a = Agent(**AGENT_SIMPLE_DICT)
+
+    with pytest.raises(TypeError):
+        a.id = PARENT_ID
+
+
+def test_machine_id_immutable():
+    a = Agent(**AGENT_SIMPLE_DICT)
+
+    with pytest.raises(TypeError):
+        a.machine_id = 10
+
+
+def test_start_time_immutable():
+    a = Agent(**AGENT_SIMPLE_DICT)
+
+    with pytest.raises(TypeError):
+        a.start_time = 100
+
+
+def test_parent_id_immutable():
+    a = Agent(**AGENT_SIMPLE_DICT)
+
+    with pytest.raises(TypeError):
+        a.parent_id = AGENT_ID
+
+
+def test_stop_time_set_validated():
+    a = Agent(**AGENT_SIMPLE_DICT)
+
+    with pytest.raises(ValueError):
+        a.stop_time = "testing!"
+
+
+def test_cc_server_set_validated():
+    a = Agent(**AGENT_SIMPLE_DICT)
+
+    with pytest.raises(ValueError):
+        a.cc_server = None
+
+
+def test_log_contents_set_validated():
+    a = Agent(**AGENT_SIMPLE_DICT)
+
+    with pytest.raises(ValueError):
+        a.log_contents = None
diff --git a/monkey/tests/unit_tests/monkey_island/cc/models/test_machine.py b/monkey/tests/unit_tests/monkey_island/cc/models/test_machine.py
new file mode 100644
index 000000000..a6d152dc0
--- /dev/null
+++ b/monkey/tests/unit_tests/monkey_island/cc/models/test_machine.py
@@ -0,0 +1,160 @@
+import uuid
+from ipaddress import IPv4Interface
+from types import MappingProxyType
+from typing import MutableSequence
+
+import pytest
+
+from common import OperatingSystems
+from monkey_island.cc.models import Machine
+
+MACHINE_OBJECT_DICT = MappingProxyType(
+    {
+        "id": 1,
+        "hardware_id": uuid.getnode(),
+        "network_interfaces": [IPv4Interface("10.0.0.1/24"), IPv4Interface("192.168.5.32/16")],
+        "operating_system": OperatingSystems.WINDOWS,
+        "operating_system_version": "eXtra Problems",
+        "hostname": "my.host",
+    }
+)
+
+MACHINE_SIMPLE_DICT = MappingProxyType(
+    {
+        "id": 1,
+        "hardware_id": uuid.getnode(),
+        "network_interfaces": ["10.0.0.1/24", "192.168.5.32/16"],
+        "operating_system": "windows",
+        "operating_system_version": "eXtra Problems",
+        "hostname": "my.host",
+    }
+)
+
+
+def test_constructor():
+    # Raises exception_on_failure
+    Machine(**MACHINE_OBJECT_DICT)
+
+
+def test_from_dict():
+    # Raises exception_on_failure
+    Machine(**MACHINE_SIMPLE_DICT)
+
+
+def test_to_dict():
+    m = Machine(**MACHINE_OBJECT_DICT)
+
+    assert m.dict(simplify=True) == dict(MACHINE_SIMPLE_DICT)
+
+
+@pytest.mark.parametrize(
+    "key, value",
+    [
+        ("id", "not-an-int"),
+        ("hardware_id", "not-an-int"),
+        ("network_interfaces", "not-a-list"),
+        ("operating_system", 2.1),
+        ("operating_system", "bsd"),
+        ("operating_system_version", {}),
+        ("hostname", []),
+    ],
+)
+def test_construct_invalid_field__type_error(key, value):
+    invalid_type_dict = MACHINE_SIMPLE_DICT.copy()
+    invalid_type_dict[key] = value
+
+    with pytest.raises(TypeError):
+        Machine(**invalid_type_dict)
+
+
+@pytest.mark.parametrize(
+    "key, value",
+    [
+        ("id", -1),
+        ("hardware_id", 0),
+        ("network_interfaces", [1, "stuff", 3]),
+        ("network_interfaces", ["10.0.0.1/16", 2, []]),
+    ],
+)
+def test_construct_invalid_field__value_error(key, value):
+    invalid_type_dict = MACHINE_SIMPLE_DICT.copy()
+    invalid_type_dict[key] = value
+
+    with pytest.raises(ValueError):
+        Machine(**invalid_type_dict)
+
+
+def test_construct__extra_fields_forbidden():
+    extra_field_dict = MACHINE_SIMPLE_DICT.copy()
+    extra_field_dict["extra_field"] = 99  # red balloons
+
+    with pytest.raises(ValueError):
+        Machine(**extra_field_dict)
+
+
+def test_id_immutable():
+    m = Machine(**MACHINE_OBJECT_DICT)
+    with pytest.raises(TypeError):
+        m.id = 2
+
+
+@pytest.mark.parametrize("hardware_id", [None, 1, 100])
+def test_hardware_id_set_valid_value(hardware_id):
+    m = Machine(**MACHINE_OBJECT_DICT)
+
+    # Raises exception_on_failure
+    m.hardware_id = hardware_id
+
+
+def test_hardware_id_validate_on_set():
+    m = Machine(**MACHINE_OBJECT_DICT)
+    with pytest.raises(ValueError):
+        m.hardware_id = -50
+
+
+def test_network_interfaces_set_valid_value():
+    m = Machine(**MACHINE_OBJECT_DICT)
+
+    # Raises exception_on_failure
+    m.network_interfaces = [IPv4Interface("172.1.2.3/24")]
+
+
+def test_network_interfaces_set_invalid_value():
+    m = Machine(**MACHINE_OBJECT_DICT)
+
+    with pytest.raises(ValueError):
+        m.network_interfaces = [IPv4Interface("172.1.2.3/24"), None]
+
+
+def test_network_interfaces_sequence_is_immutable():
+    m = Machine(**MACHINE_OBJECT_DICT)
+
+    assert not isinstance(m.network_interfaces, MutableSequence)
+
+
+def test_operating_system_set_valid_value():
+    m = Machine(**MACHINE_OBJECT_DICT)
+
+    # Raises exception_on_failure
+    m.operating_system = OperatingSystems.LINUX
+
+
+def test_operating_system_set_invalid_value():
+    m = Machine(**MACHINE_OBJECT_DICT)
+
+    with pytest.raises(ValueError):
+        m.operating_system = "MacOS"
+
+
+def test_set_operating_system_version():
+    m = Machine(**MACHINE_OBJECT_DICT)
+
+    # Raises exception_on_failure
+    m.operating_system_version = "1234"
+
+
+def test_set_hostname():
+    m = Machine(**MACHINE_OBJECT_DICT)
+
+    # Raises exception_on_failure
+    m.operating_system_version = "wopr"
diff --git a/monkey/tests/unit_tests/monkey_island/cc/models/test_node.py b/monkey/tests/unit_tests/monkey_island/cc/models/test_node.py
new file mode 100644
index 000000000..e980ad5d6
--- /dev/null
+++ b/monkey/tests/unit_tests/monkey_island/cc/models/test_node.py
@@ -0,0 +1,96 @@
+from typing import MutableSequence
+
+import pytest
+
+from monkey_island.cc.models import CommunicationType, Node
+
+
+def test_constructor():
+    machine_id = 1
+    connections = (
+        (6, (CommunicationType.SCANNED,)),
+        (7, (CommunicationType.SCANNED, CommunicationType.EXPLOITED)),
+    )
+    n = Node(
+        machine_id=1,
+        connections=connections,
+    )
+
+    assert n.machine_id == machine_id
+    assert n.connections == connections
+
+
+def test_serialization():
+    node_dict = {
+        "machine_id": 1,
+        "connections": [
+            [
+                6,
+                ["cc", "scanned"],
+            ],
+            [7, ["exploited", "cc_tunnel"]],
+        ],
+    }
+    n = Node(**node_dict)
+
+    assert n.dict(simplify=True) == node_dict
+
+
+def test_machine_id_immutable():
+    n = Node(machine_id=1, connections=[])
+
+    with pytest.raises(TypeError):
+        n.machine_id = 2
+
+
+def test_machine_id__invalid_type():
+    with pytest.raises(TypeError):
+        Node(machine_id=None, connections=[])
+
+
+def test_machine_id__invalid_value():
+    with pytest.raises(ValueError):
+        Node(machine_id=-5, connections=[])
+
+
+def test_connections__mutable():
+    n = Node(machine_id=1, connections=[])
+
+    # Raises exception on failure
+    n.connections = [(5, []), (7, [])]
+
+
+def test_connections__invalid_machine_id():
+    n = Node(machine_id=1, connections=[])
+
+    with pytest.raises(ValueError):
+        n.connections = [(5, []), (-5, [])]
+
+
+def test_connections__recursively_immutable():
+    n = Node(
+        machine_id=1,
+        connections=[
+            [6, [CommunicationType.SCANNED]],
+            [7, [CommunicationType.SCANNED, CommunicationType.EXPLOITED]],
+        ],
+    )
+
+    assert not isinstance(n.connections, MutableSequence)
+    assert not isinstance(n.connections[0], MutableSequence)
+    assert not isinstance(n.connections[1], MutableSequence)
+    assert not isinstance(n.connections[0][1], MutableSequence)
+    assert not isinstance(n.connections[1][1], MutableSequence)
+
+
+def test_connections__set_invalid_communications_type():
+    connections = (
+        [
+            [8, [CommunicationType.SCANNED, "invalid_comm_type"]],
+        ],
+    )
+
+    n = Node(machine_id=1, connections=[])
+
+    with pytest.raises(ValueError):
+        n.connections = connections
diff --git a/monkey/tests/unit_tests/monkey_island/cc/models/test_transforms.py b/monkey/tests/unit_tests/monkey_island/cc/models/test_transforms.py
new file mode 100644
index 000000000..9d8f125e2
--- /dev/null
+++ b/monkey/tests/unit_tests/monkey_island/cc/models/test_transforms.py
@@ -0,0 +1,53 @@
+from itertools import zip_longest
+import pytest
+from typing import MutableSequence, Sequence
+
+from monkey_island.cc.models.transforms import (
+    make_immutable_nested_sequence,
+    make_immutable_sequence,
+)
+
+
+def test_make_immutable_sequence__list():
+    mutable_sequence = [1, 2, 3]
+    immutable_sequence = make_immutable_sequence(mutable_sequence)
+
+    assert isinstance(immutable_sequence, Sequence)
+    assert not isinstance(immutable_sequence, MutableSequence)
+    assert_sequences_equal(mutable_sequence, immutable_sequence)
+
+
+@pytest.mark.parametrize(
+    "mutable_sequence", [
+        [1, 2, 3],
+        [[1, 2, 3], [4, 5, 6]],
+        [[1, 2, 3, [4, 5, 6]], [4, 5, 6]],
+        [8, [5.3, "invalid_comm_type"]]]
+)
+def test_make_immutable_nested_sequence(mutable_sequence):
+    immutable_sequence = make_immutable_nested_sequence(mutable_sequence)
+
+    assert isinstance(immutable_sequence, Sequence)
+    assert not isinstance(immutable_sequence, MutableSequence)
+    assert_sequences_equal(mutable_sequence, immutable_sequence)
+
+
+def assert_sequence_immutable_recursive(sequence: Sequence):
+    assert not isinstance(sequence, MutableSequence)
+
+    for s in sequence:
+        if isinstance(s, str):
+            continue
+
+        if isinstance(s, Sequence):
+            assert_sequence_immutable_recursive(s)
+            assert not isinstance(s, MutableSequence)
+
+
+def assert_sequences_equal(a: Sequence, b: Sequence):
+    assert len(a) == len(b)
+    for i, j in zip_longest(a, b):
+        if isinstance(i, str) or not isinstance(i, Sequence):
+            assert i == j
+        else:
+            assert_sequences_equal(i, j)
diff --git a/vulture_allowlist.py b/vulture_allowlist.py
index b340dc97c..205081b65 100644
--- a/vulture_allowlist.py
+++ b/vulture_allowlist.py
@@ -209,6 +209,15 @@ _serialize_credentials  # unused method (monkey/common/credentials/credentials:6
 
 # Models
 _make_simulation  # unused method (monkey/monkey_island/cc/models/simulation.py:19
+operating_system_version
+_make_sequence_immutable
+Agent
+machine_id
+stop_time
+parent_id
+cc_server
+hardware_id
+connections
 
 # TODO DELETE AFTER RESOURCE REFACTORING
 
@@ -274,3 +283,16 @@ serialize
 event
 deserialize
 serialized_event
+
+# pydantic base models
+underscore_attrs_are_private
+extra
+allow_mutation
+validate_assignment
+
+# CommunicationType
+CommunicationType
+SCANNED
+EXPLOITED
+CC
+CC_TUNNEL