diff --git a/db_revisions/env.py b/db_revisions/env.py
index 722aa94f..6b8f4d77 100644
--- a/db_revisions/env.py
+++ b/db_revisions/env.py
@@ -1,3 +1,5 @@
+import os
+
 from logging.config import fileConfig
 
 from sqlalchemy import engine_from_config
diff --git a/pyproject.toml b/pyproject.toml
index da691ae5..d976444d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -48,6 +48,9 @@ addopts = [
   "--strict-markers",
   "-rfE",
 ]
+env = [
+  "INST_DB_SCHEMA=main"
+]
 testpaths = ["tests"]
 
 [tool.black]
diff --git a/src/entities/engine/__init__.py b/src/entities/engine/__init__.py
new file mode 100644
index 00000000..1fa81932
--- /dev/null
+++ b/src/entities/engine/__init__.py
@@ -0,0 +1,3 @@
+__all__ = ["get_session"]
+
+from .engine import get_session
diff --git a/src/entities/engine/engine.py b/src/entities/engine/engine.py
new file mode 100644
index 00000000..9a436825
--- /dev/null
+++ b/src/entities/engine/engine.py
@@ -0,0 +1,20 @@
+from sqlalchemy.ext.asyncio import (
+    create_async_engine,
+    async_sessionmaker,
+    async_scoped_session,
+)
+from asyncio import current_task
+from config import settings
+
+engine = create_async_engine(settings.inst_conn.unicode_string(), echo=True).execution_options(
+    schema_translate_map={None: settings.inst_db_schema}
+)
+SessionLocal = async_scoped_session(async_sessionmaker(engine, expire_on_commit=False), current_task)
+
+
+async def get_session():
+    session = SessionLocal()
+    try:
+        yield session
+    finally:
+        await session.close()
diff --git a/src/entities/models/__init__.py b/src/entities/models/__init__.py
new file mode 100644
index 00000000..27994b25
--- /dev/null
+++ b/src/entities/models/__init__.py
@@ -0,0 +1,12 @@
+__all__ = [
+    "Base",
+    "SubmissionDAO",
+    "ValidationResultDAO",
+    "RecordDAO",
+    "RecordDTO",
+    "ValidationResultDTO",
+    "SubmissionDTO",
+]
+
+from .dao import Base, SubmissionDAO, ValidationResultDAO, RecordDAO
+from .dto import RecordDTO, ValidationResultDTO, SubmissionDTO
diff --git a/src/entities/models/dao.py b/src/entities/models/dao.py
new file mode 100644
index 00000000..d2ef7875
--- /dev/null
+++ b/src/entities/models/dao.py
@@ -0,0 +1,49 @@
+from datetime import datetime
+from typing import get_args, List, Any, Literal
+from sqlalchemy import ForeignKey, func, Enum
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+from sqlalchemy.orm import DeclarativeBase
+from sqlalchemy.ext.asyncio import AsyncAttrs
+from sqlalchemy.types import JSON
+
+Severity = Literal["error", "warning"]
+
+
+class Base(AsyncAttrs, DeclarativeBase):
+    pass
+
+
+class AuditMixin(object):
+    event_time: Mapped[datetime] = mapped_column(server_default=func.now())
+
+
+class SubmissionDAO(AuditMixin, Base):
+    __tablename__ = "submission"
+    submission_id: Mapped[str] = mapped_column(index=True, primary_key=True)
+    submitter: Mapped[str]
+    lei: Mapped[str]
+    results: Mapped[List["ValidationResultDAO"]] = relationship(back_populates="submission")
+    json_dump: Mapped[dict[str, Any]] = mapped_column(JSON, nullable=True)
+
+    def __str__(self):
+        return f"Submission ID: {self.submission_id}, Submitter: {self.submitter}, LEI: {self.lei}"
+
+
+class ValidationResultDAO(AuditMixin, Base):
+    __tablename__ = "validation_result"
+    id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
+    submission_id: Mapped[str] = mapped_column(ForeignKey("submission.submission_id"))
+    submission: Mapped["SubmissionDAO"] = relationship(back_populates="results")  # if we care about bidirectional
+    validation_id: Mapped[str]
+    field_name: Mapped[str]
+    severity: Mapped[Severity] = mapped_column(Enum(*get_args(Severity)))
+    records: Mapped[List["RecordDAO"]] = relationship(back_populates="result")
+
+
+class RecordDAO(AuditMixin, Base):
+    __tablename__ = "validation_result_record"
+    id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
+    result_id: Mapped[str] = mapped_column(ForeignKey("validation_result.id"))
+    result: Mapped["ValidationResultDAO"] = relationship(back_populates="records")  # if we care about bidirectional
+    record: Mapped[int]
+    data: Mapped[str]
diff --git a/src/entities/models/dto.py b/src/entities/models/dto.py
new file mode 100644
index 00000000..f66bb8cc
--- /dev/null
+++ b/src/entities/models/dto.py
@@ -0,0 +1,27 @@
+from typing import List
+from pydantic import BaseModel, ConfigDict
+
+
+class RecordDTO(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    record: int
+    data: str
+
+
+class ValidationResultDTO(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    validation_id: str
+    field_name: str
+    severity: str
+    records: List[RecordDTO] = []
+
+
+class SubmissionDTO(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    submission_id: str
+    lei: str
+    submitter: str
+    results: List[ValidationResultDTO] = []
diff --git a/src/entities/repos/__init__.py b/src/entities/repos/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/src/entities/repos/submission_repo.py b/src/entities/repos/submission_repo.py
new file mode 100644
index 00000000..2bb45d7a
--- /dev/null
+++ b/src/entities/repos/submission_repo.py
@@ -0,0 +1,44 @@
+from sqlalchemy import select
+from sqlalchemy.orm import joinedload
+from sqlalchemy.ext.asyncio import AsyncSession
+
+import pandas as pd
+from entities.models import SubmissionDAO, ValidationResultDAO, RecordDAO
+
+
+async def get_submission(session: AsyncSession, submission_id: str) -> SubmissionDAO:
+    async with session.begin():
+        stmt = (
+            select(SubmissionDAO)
+            .options(joinedload(SubmissionDAO.results).joinedload(ValidationResultDAO.records))
+            .filter(SubmissionDAO.submission_id == submission_id)
+        )
+        return await session.scalar(stmt)
+
+# I was thinking this would be called after calling data_validator.create_schemas.validate()
+# which returns a boolean, DataFrame tuple. The DataFrame represents the results of validation.
+# Not sure if we'll already have the submission info in a DTO at this time (from the endpoint call)
+# so we may be able to change the submission_id, submitter, and lei into an object versus individual
+# data fields.
+async def add_submission(
+    session: AsyncSession, submission_id: str, submitter: str, lei: str, results: pd.DataFrame
+) -> SubmissionDAO:
+    async with session.begin():
+        findings_by_v_id_df = results.reset_index().set_index(["validation_id"])
+        submission = SubmissionDAO(submission_id=submission_id, submitter=submitter, lei=lei)
+        validation_results = []
+        for v_id_idx, v_id_df in findings_by_v_id_df.groupby(by="validation_id"):
+            v_head = v_id_df.iloc[0]
+            result = ValidationResultDAO(
+                validation_id=v_id_idx, field_name=v_head.at["field_name"], severity=v_head.at["validation_severity"]
+            )
+            records = []
+            for rec_no, rec_df in v_id_df.iterrows():
+                record = RecordDAO(record=rec_df.at["record_no"], data=rec_df.at["field_value"])
+                records.append(record)
+            result.records = records
+            validation_results.append(result)
+        submission.results = validation_results
+        session.add(submission)
+
+        return submission
diff --git a/tests/entities/conftest.py b/tests/entities/conftest.py
new file mode 100644
index 00000000..fc0633d0
--- /dev/null
+++ b/tests/entities/conftest.py
@@ -0,0 +1,61 @@
+import asyncio
+import pytest
+
+from asyncio import current_task
+from sqlalchemy.ext.asyncio import (
+    create_async_engine,
+    AsyncEngine,
+    async_scoped_session,
+    async_sessionmaker,
+)
+from entities.models import Base
+
+
+@pytest.fixture(scope="session")
+def event_loop():
+    loop = asyncio.get_event_loop()
+    try:
+        yield loop
+    finally:
+        loop.close()
+
+
+@pytest.fixture(scope="session")
+def engine():
+    return create_async_engine("sqlite+aiosqlite://")
+
+
+@pytest.fixture(scope="function", autouse=True)
+async def setup_db(
+    request: pytest.FixtureRequest,
+    engine: AsyncEngine,
+    event_loop: asyncio.AbstractEventLoop,
+):
+    async with engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)
+
+    def teardown():
+        async def td():
+            async with engine.begin() as conn:
+                await conn.run_sync(Base.metadata.drop_all)
+
+        event_loop.run_until_complete(td())
+
+    request.addfinalizer(teardown)
+
+
+@pytest.fixture(scope="function")
+async def transaction_session(session_generator: async_scoped_session):
+    async with session_generator() as session:
+        yield session
+
+
+@pytest.fixture(scope="function")
+async def query_session(session_generator: async_scoped_session):
+    async with session_generator() as session:
+        yield session
+
+
+@pytest.fixture(scope="function")
+def session_generator(engine: AsyncEngine):
+    return async_scoped_session(async_sessionmaker(engine, expire_on_commit=False), current_task)
diff --git a/tests/entities/repos/test_submission_repo.py b/tests/entities/repos/test_submission_repo.py
new file mode 100644
index 00000000..48c56fec
--- /dev/null
+++ b/tests/entities/repos/test_submission_repo.py
@@ -0,0 +1,95 @@
+import pandas as pd
+import pytest
+
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from entities.models import SubmissionDAO, ValidationResultDAO, RecordDAO
+from entities.repos import submission_repo as repo
+
+
+class TestSubmissionRepo:
+    @pytest.fixture(scope="function", autouse=True)
+    async def setup(
+        self,
+        transaction_session: AsyncSession,
+    ):
+        submission = SubmissionDAO(submission_id="12345", submitter="test@cfpb.gov", lei="1234567890ABCDEFGHIJ")
+        results = []
+        result1 = ValidationResultDAO(validation_id="E0123", field_name="uid", severity="error")
+        records = []
+        record1a = RecordDAO(record=1, data="empty")
+        records.append(record1a)
+        result1.records = records
+        results.append(result1)
+        submission.results = results
+
+        transaction_session.add(submission)
+        await transaction_session.commit()
+
+    async def test_get_submission(self, query_session: AsyncSession):
+        res = await repo.get_submission(query_session, submission_id="12345")
+        assert res.submission_id == "12345"
+        assert res.submitter == "test@cfpb.gov"
+        assert res.lei == "1234567890ABCDEFGHIJ"
+        assert len(res.results) == 1
+        assert len(res.results[0].records) == 1
+        assert res.results[0].validation_id == "E0123"
+        assert res.results[0].records[0].data == "empty"
+
+    async def test_add_submission(self, transaction_session: AsyncSession):
+        df_columns = [
+            "record_no",
+            "field_name",
+            "field_value",
+            "validation_severity",
+            "validation_id",
+            "validation_name",
+            "validation_desc",
+        ]
+        df_data = [
+            [
+                0,
+                "uid",
+                "BADUID0",
+                "error",
+                "E0001",
+                "id.invalid_text_length",
+                "'Unique identifier' must be at least 21 characters in length.",
+            ],
+            [
+                0,
+                "uid",
+                "BADTEXTLENGTH",
+                "error",
+                "E0100",
+                "ct_credit_product_ff.invalid_text_length",
+                "'Free-form text field for other credit products' must not exceed 300 characters in length.",
+            ],
+            [
+                1,
+                "uid",
+                "BADUID1",
+                "error",
+                "E0001",
+                "id.invalid_text_length",
+                "'Unique identifier' must be at least 21 characters in length.",
+            ],
+        ]
+        error_df = pd.DataFrame(df_data, columns=df_columns)
+        print(f"Data Frame: {error_df}")
+        res = await repo.add_submission(
+            transaction_session,
+            submission_id="12346",
+            submitter="test@cfpb.gov",
+            lei="1234567890ABCDEFGHIJ",
+            results=error_df,
+        )
+        assert res.submission_id == "12346"
+        assert res.submitter == "test@cfpb.gov"
+        assert res.lei == "1234567890ABCDEFGHIJ"
+        assert len(res.results) == 2  # Two error codes, 3 records total
+        assert len(res.results[0].records) == 2
+        assert len(res.results[1].records) == 1
+        assert res.results[0].validation_id == "E0001"
+        assert res.results[1].validation_id == "E0100"
+        assert res.results[0].records[0].data == "BADUID0"
diff --git a/tests/migrations/test_migrations.py b/tests/migrations/test_migrations.py
new file mode 100644
index 00000000..29682fb4
--- /dev/null
+++ b/tests/migrations/test_migrations.py
@@ -0,0 +1,29 @@
+from pytest_alembic.tests import (
+    test_single_head_revision,
+    test_up_down_consistency,
+    test_upgrade,
+)
+
+import sqlalchemy
+from sqlalchemy.engine import Engine
+
+from pytest_alembic import MigrationContext
+
+
+def test_migrations(alembic_runner: MigrationContext, alembic_engine: Engine):
+    alembic_runner.migrate_up_to("af1ba24f831a")
+
+    inspector = sqlalchemy.inspect(alembic_engine)
+    tables = inspector.get_table_names()
+    assert "submission" in tables
+    assert {"submission_id", "submitter", "lei", "json_dump", "event_time"} == set([c["name"] for c in inspector.get_columns("submission")])
+    
+    assert "validation_result" in tables
+    assert {"id", "submission_id", "validation_id", "field_name", "severity", "event_time"} == set([c["name"] for c in inspector.get_columns("validation_result")])
+    vr_fk = inspector.get_foreign_keys("validation_result")[0]
+    assert "submission_id" in vr_fk["constrained_columns"] and "submission" == vr_fk["referred_table"] and "submission_id" in vr_fk["referred_columns"]
+    
+    assert "validation_result_record" in tables
+    assert {"id", "result_id", "record", "data", "event_time"} == set([c["name"] for c in inspector.get_columns("validation_result_record")])
+    vrr_fk = inspector.get_foreign_keys("validation_result_record")[0]
+    assert "result_id" in vrr_fk["constrained_columns"] and "validation_result" == vrr_fk["referred_table"] and "id" in vrr_fk["referred_columns"]
\ No newline at end of file