diff --git a/models.py b/models.py
new file mode 100644
index 0000000..fa890a3
--- /dev/null
+++ b/models.py
@@ -0,0 +1,22 @@
+from dataclasses import dataclass, field
+from typing import List
+
+@dataclass
+class Ticket:
+    """
+    Represents a discrete unit of work within a track.
+    """
+    id: str
+    description: str
+    status: str
+    assigned_to: str
+    depends_on: List[str] = field(default_factory=list)
+
+@dataclass
+class Track:
+    """
+    Represents a collection of tickets that together form an architectural track or epic.
+    """
+    id: str
+    description: str
+    tickets: List[Ticket] = field(default_factory=list)
diff --git a/tests/test_mma_models.py b/tests/test_mma_models.py
new file mode 100644
index 0000000..c84389a
--- /dev/null
+++ b/tests/test_mma_models.py
@@ -0,0 +1,69 @@
+import pytest
+from models import Ticket, Track
+
+def test_ticket_instantiation():
+    """
+    Verifies that a Ticket can be instantiated with its required fields:
+    id, description, status, assigned_to.
+    """
+    ticket_id = "T1"
+    description = "Implement surgical code changes"
+    status = "todo"
+    assigned_to = "tier3-worker"
+    
+    ticket = Ticket(
+        id=ticket_id,
+        description=description,
+        status=status,
+        assigned_to=assigned_to
+    )
+    
+    assert ticket.id == ticket_id
+    assert ticket.description == description
+    assert ticket.status == status
+    assert ticket.assigned_to == assigned_to
+    assert ticket.depends_on == []
+
+def test_ticket_with_dependencies():
+    """
+    Verifies that a Ticket can store dependencies.
+    """
+    ticket = Ticket(
+        id="T2",
+        description="Write code",
+        status="todo",
+        assigned_to="worker-1",
+        depends_on=["T1"]
+    )
+    assert ticket.depends_on == ["T1"]
+
+def test_track_instantiation():
+    """
+    Verifies that a Track can be instantiated with its required fields:
+    id, description, and a list of Tickets.
+    """
+    ticket1 = Ticket(id="T1", description="Task 1", status="todo", assigned_to="a")
+    ticket2 = Ticket(id="T2", description="Task 2", status="todo", assigned_to="b")
+    
+    track_id = "TRACK-1"
+    track_desc = "Implement MMA Models"
+    tickets = [ticket1, ticket2]
+    
+    track = Track(
+        id=track_id,
+        description=track_desc,
+        tickets=tickets
+    )
+    
+    assert track.id == track_id
+    assert track.description == track_desc
+    assert len(track.tickets) == 2
+    assert track.tickets[0].id == "T1"
+    assert track.tickets[1].id == "T2"
+
+def test_track_can_handle_empty_tickets():
+    """
+    Verifies that a Track can be instantiated with an empty list of tickets.
+    """
+    track = Track(id="TRACK-2", description="Empty Track", tickets=[])
+    assert track.tickets == []