diff --git a/.circleci/config.yml b/.circleci/config.yml
deleted file mode 100644
index 2040abd9..00000000
--- a/.circleci/config.yml
+++ /dev/null
@@ -1,156 +0,0 @@
-# Python CircleCI 2.0 configuration file
-#
-# Check https://circleci.com/docs/2.0/language-python/ for more details
-#
-version: 2.1
-
-jobs:
-  publish:
-    docker:
-      - image: cimg/python:3.9
-    parameters:
-      registry_url:
-        description: Registry URL to upload the CLI to
-        type: string
-        default: https://upload.pypi.org/legacy/
-      username:
-        description: Twine username
-        type: string
-      password:
-        description: Twine password
-        type: string
-    steps:
-      - checkout
-      - run: pip install --user --upgrade setuptools twine wheel
-      - run: |
-          python setup.py sdist bdist_wheel
-          twine upload --repository-url <<parameters.registry_url>> --username <<parameters.username>> --password <<parameters.password>> --verbose dist/*
-
-orbs:
-  python: circleci/python@2.1.1
-  cloudsmith_ci:
-    jobs:
-      execute:
-        parameters:
-          service_name:
-            description: Name of the command to execute
-            type: string
-          command:
-            description: The command to execute
-            type: string
-          no_output_timeout:
-            description: Number of seconds to let job run without output before timeout
-            type: integer
-            default: 600
-          is_test_suite:
-            description: Should the job collect test results and coverage?
-            type: boolean
-            default: false
-        executor: cloudsmith_executor
-        working_directory: ~/repo
-        steps:
-          - checkout
-          - restore_cache:
-              keys:
-                - v1-dependencies-{{ checksum "requirements.txt" }}
-                - v1-dependencies-
-          - run:
-              name: Install dependencies
-              command: |
-                python3 -m pip install uv
-                uv venv .venv --allow-existing
-                uv pip install -r requirements.txt
-                . .venv/bin/activate
-          - save_cache:
-              paths:
-                - .venv
-              key: v1-dependencies-{{ checksum "requirements.txt" }}
-          - run:
-              name: Run <<parameters.service_name>>
-              command: |
-                . .venv/bin/activate
-                <<parameters.command>>
-                echo $? > /tmp/run_exit_code
-              no_output_timeout: <<parameters.no_output_timeout>>
-          - when:
-              condition: <<parameters.is_test_suite>>
-              steps:
-                - store_test_results:
-                    path: ./reports
-                - store_artifacts:
-                    path: ./reports
-
-    executors:
-      cloudsmith_executor:
-        docker:
-          - image: circleci/python:3.9
-
-
-workflows:
-  commit:
-    jobs:
-      - cloudsmith_ci/execute:
-          name: isort
-          service_name: isort
-          command: pre-commit run -a isort
-      - cloudsmith_ci/execute:
-          name: black
-          service_name: black
-          command: pre-commit run -a black
-      - cloudsmith_ci/execute:
-          name: flake8
-          service_name: flake8
-          command: pre-commit run -a flake8
-      - cloudsmith_ci/execute:
-          name: pyupgrade
-          service_name: pyupgrade
-          command: pre-commit run -a pyupgrade
-      - cloudsmith_ci/execute:
-          name: pylint
-          service_name: pylint
-          command: pylint --rcfile=.pylintrc cloudsmith_cli
-          no_output_timeout: 1200
-      - cloudsmith_ci/execute:
-          name: pytest
-          service_name: pytest
-          command: pytest --junitxml ./reports/pytest.xml
-          is_test_suite: true
-      - python/test:
-          name: pytest-python3.10
-          version: "3.10"
-          pkg-manager: pip
-          pip-dependency-file: requirements.txt
-      - python/test:
-          name: pytest-python3.11
-          version: "3.11"
-          pkg-manager: pip
-          pip-dependency-file: requirements.txt
-      - python/test:
-          name: pytest-python3.12
-          version: "3.12"
-          pkg-manager: pip
-          pip-dependency-file: requirements.txt
-      - python/test:
-          name: pytest-python3.13
-          version: "3.13"
-          pkg-manager: pip
-          pip-dependency-file: requirements.txt
-      - publish:
-          filters:
-            branches:
-              ignore: /.*/
-            tags:
-              only: /^v.*/
-          name: cloudsmith
-          registry_url: https://python.cloudsmith.io/cloudsmith/cli/
-          username: $CLOUDSMITH_USERNAME
-          password: $CLOUDSMITH_PASSWORD
-      - publish:
-          filters:
-            branches:
-              ignore: /.*/
-            tags:
-              only: /^v.*/
-          name: pypi
-          username: $PYPI_USERNAME
-          password: $PYPI_PASSWORD
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index c52a94cc..188735fc 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -6,26 +6,35 @@ on:
             - "v*"
 
 permissions:
- id-token: write
- contents: write
+  id-token: write
+  contents: write
+
 jobs:
+    # Build and publish to GitHub, Cloudsmith (zipapp + Docker)
     build:
+        name: Build and publish artifacts
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v2
+            - uses: actions/checkout@v4
+
             - name: Set up Python 3.11
-              uses: actions/setup-python@v2
+              uses: actions/setup-python@v5
               with:
                   python-version: 3.11
+                  cache: 'pip'
+
             - name: Install dependencies
               run: |
                   python -m pip install --upgrade pip
                   pip install shiv
+
             - name: Get version
               id: get_version
               run: echo "VERSION=$(cat cloudsmith_cli/data/VERSION)" >> $GITHUB_ENV
+
             - name: Create Zipapp
               run: shiv -o cloudsmith-${{ env.VERSION }}.pyz -c cloudsmith .
+
             - name: Create Release
               id: create_release
               uses: actions/create-release@v1
@@ -36,6 +45,7 @@ jobs:
                   release_name: Release v${{ env.VERSION }}
                   draft: false
                   prerelease: false
+
             - name: Upload Release Asset
               id: upload-release-asset
               uses: actions/upload-release-asset@v1
@@ -46,26 +56,68 @@ jobs:
                   asset_path: ./cloudsmith-${{ env.VERSION }}.pyz
                   asset_name: cloudsmith-${{ env.VERSION }}.pyz
                   asset_content_type: application/zip
+
             - name: Install and authenticate Cloudsmith CLI
-              uses: cloudsmith-io/cloudsmith-cli-action@v1.0.3
+              uses: cloudsmith-io/cloudsmith-cli-action@v1
               with:
                   oidc-namespace: ${{ vars.CLOUDSMITH_NAMESPACE }}
                   oidc-service-slug: ${{ vars.CLOUDSMITH_SVC_SLUG }}
+
             - name: Push Zipapp to Cloudsmith
               id: push_zipapp
               run: cloudsmith push raw ${{ vars.CLOUDSMITH_NAMESPACE }}/cli-zipapp ./cloudsmith-${{ env.VERSION }}.pyz --name cloudsmith-cli --version ${{ env.VERSION }}
+
+            - name: Install build dependencies for Python packages
+              run: pip install setuptools wheel
+
+            - name: Build Python packages
+              run: python setup.py sdist bdist_wheel
+
+            - name: Push source distribution to Cloudsmith
+              run: cloudsmith push python ${{ vars.CLOUDSMITH_NAMESPACE }}/cli dist/cloudsmith-cli-${{ env.VERSION }}.tar.gz
+
+            - name: Push wheel to Cloudsmith
+              run: cloudsmith push python ${{ vars.CLOUDSMITH_NAMESPACE }}/cli dist/cloudsmith_cli-${{ env.VERSION }}-py3-none-any.whl
+
             - name: Build Docker image
               id: build_cli_image
               run: |
                   docker build --build-arg CLOUDSMITH_CLI_VERSION=${{ env.VERSION }} -t docker.cloudsmith.io/${{ vars.CLOUDSMITH_NAMESPACE }}/cli-zipapp/cloudsmith-cli:${{ env.VERSION }} .
+
             - name: Push Dockerised CLI to Cloudsmith
               id: push_dockerised_cli_cloudsmith
               run: |
                   echo "${CLOUDSMITH_API_KEY}" | docker login docker.cloudsmith.io -u ${{ vars.CLOUDSMITH_SVC_SLUG }} --password-stdin
                   docker push docker.cloudsmith.io/${{ vars.CLOUDSMITH_NAMESPACE }}/cli-zipapp/cloudsmith-cli:${{ env.VERSION }}
+
             - name: Push Dockerised CLI to DockerHub
               id: push_dockerised_cli_dockerhub
               run: |
                 docker tag docker.cloudsmith.io/${{ vars.CLOUDSMITH_NAMESPACE }}/cli-zipapp/cloudsmith-cli:${{ env.VERSION }} cloudsmith/cloudsmith-cli:${{ env.VERSION }}
                 echo "${{ secrets.DOCKERHUB_PAT }}" | docker login -u ${{ vars.DOCKERHUB_USER }} --password-stdin
                 docker push cloudsmith/cloudsmith-cli:${{ env.VERSION }}
+
+    # Publish Python packages to PyPI
+    publish-pypi:
+        name: Publish to PyPI
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v4
+
+            - name: Set up Python 3.11
+              uses: actions/setup-python@v5
+              with:
+                  python-version: 3.11
+
+            - name: Install build dependencies
+              run: |
+                  python -m pip install --upgrade pip
+                  pip install setuptools wheel
+
+            - name: Build packages
+              run: python setup.py sdist bdist_wheel
+
+            - name: Publish to PyPI
+              uses: pypa/gh-action-pypi-publish@release/v1
+              with:
+                  packages-dir: dist/
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 00000000..ede0356d
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,198 @@
+name: Test
+
+on:
+  push:
+    branches:
+      - '**'
+  pull_request:
+    branches:
+      - '**'
+
+permissions:
+  contents: read
+
+jobs:
+  # Linting jobs run in parallel
+  isort:
+    name: Check import sorting (isort)
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+          cache: 'pip'
+          cache-dependency-path: requirements.txt
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+
+      - name: Run isort
+        run: pre-commit run -a isort
+
+  black:
+    name: Check code formatting (black)
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+          cache: 'pip'
+          cache-dependency-path: requirements.txt
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+
+      - name: Run black
+        run: pre-commit run -a black
+
+  flake8:
+    name: Check code style (flake8)
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+          cache: 'pip'
+          cache-dependency-path: requirements.txt
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+
+      - name: Run flake8
+        run: pre-commit run -a flake8
+
+  pyupgrade:
+    name: Check for Python upgrades (pyupgrade)
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+          cache: 'pip'
+          cache-dependency-path: requirements.txt
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+
+      - name: Run pyupgrade
+        run: pre-commit run -a pyupgrade
+
+  pylint:
+    name: Run comprehensive linting (pylint)
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+          cache: 'pip'
+          cache-dependency-path: requirements.txt
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+
+      - name: Run pylint
+        run: pylint --rcfile=.pylintrc cloudsmith_cli
+
+  # Test jobs run across Python versions
+  pytest:
+    name: Run tests (Python ${{ matrix.python-version }})
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ['3.10', '3.11', '3.12', '3.13', '3.14']
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+          cache: 'pip'
+          cache-dependency-path: requirements.txt
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+
+      - name: Install package
+        run: pip install -e .
+
+      - name: Run pytest
+        env:
+          PYTEST_CLOUDSMITH_API_KEY: ${{ secrets.PYTEST_CLOUDSMITH_API_KEY }}
+          PYTEST_CLOUDSMITH_API_HOST: ${{ vars.PYTEST_CLOUDSMITH_API_HOST }}
+          PYTEST_CLOUDSMITH_ORGANIZATION: ${{ vars.PYTEST_CLOUDSMITH_ORGANIZATION }}
+        run: pytest --junitxml=./reports/pytest.xml
+
+      - name: Upload test results
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: test-results-${{ matrix.python-version }}
+          path: ./reports/pytest.xml
+          retention-days: 30
+
+  # Test zipapp build across Python versions
+  test-zipapp-build:
+    name: Test zipapp build (Python ${{ matrix.python-version }})
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ['3.10', '3.11', '3.12', '3.13', '3.14']
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+          cache: 'pip'
+
+      - name: Install shiv
+        run: pip install shiv
+
+      - name: Get version
+        id: get_version
+        run: echo "VERSION=$(cat cloudsmith_cli/data/VERSION)" >> $GITHUB_ENV
+
+      - name: Create Zipapp
+        run: shiv -o cloudsmith-${{ env.VERSION }}.pyz -c cloudsmith .
+
+      - name: Make executable
+        run: chmod +x cloudsmith-${{ env.VERSION }}.pyz
+
+      - name: Validate zipapp execution
+        run: |
+          OUTPUT=$(./cloudsmith-${{ env.VERSION }}.pyz --version)
+          echo "Zipapp Version: $OUTPUT"
+          echo "$OUTPUT" | grep "${{ env.VERSION }}"
diff --git a/.pylintrc b/.pylintrc
index d0167a24..9d1dbb02 100644
--- a/.pylintrc
+++ b/.pylintrc
@@ -88,7 +88,7 @@ persistent=yes
 
 # Minimum Python version to use for version dependent checks. Will default to
 # the version used to run pylint.
-py-version=3.9
+py-version=3.10
 
 # Discover python modules and packages in the file system subtree.
 recursive=no
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4d01e31c..d0b61d78 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,18 +7,20 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
-### Fixed
-
-- Upgraded `urllib3` from `v1.26.20` to `v2.5.0`.
-- Added `mock_keyring` fixture to prevent SSO token refresh attempts during individual `test_rest.py` test which runs in pipelines (full suite passes). Caused by [HTTPretty issue 484](https://github.com/gabrielfalcao/HTTPretty/issues/484).
-- Entitlement token list command now fixed
-
 ### Added
 
+- Migrate from CircleCI to GitHub Actions for testing and release workflows.
+- Remove CircleCi workflows.
 - Set `--show-all` to alias `--page-all`
 - Add the ability to use a shortcut within `--page-size` to use pass `-1` or `*` to retrieve all pages i.e. `--page-size -1` or `--page-size *` (note the wildcard may require escaping in some shell environments)
 - Added support for deny policy management commands (list, create, get, update, delete)
 
+### Fixed
+
+- Upgraded `urllib3` from `v1.26.20` to `v2.5.0`.
+- Added `mock_keyring` fixture to prevent SSO token refresh attempts during individual `test_rest.py` test which runs in pipelines (full suite passes). Caused by [HTTPretty issue 484](https://github.com/gabrielfalcao/HTTPretty/issues/484).
+- Entitlement token list command now fixed
+
 ## [1.9.4] - 2025-11-07
 
 > No code changes in this release. Version bump performed for release process consistency and to address packaging/metadata updates.
diff --git a/setup.py b/setup.py
index 15b20633..bcc73c7a 100644
--- a/setup.py
+++ b/setup.py
@@ -47,7 +47,7 @@ def get_long_description():
     include_package_data=True,
     zip_safe=False,
     platforms=["any"],
-    python_requires=">=3.9.0",
+    python_requires=">=3.10.0",
     install_requires=[
         "click>=8.2.0,!=8.3.0",
         "click-configfile>=0.2.3",
@@ -79,7 +79,6 @@ def get_long_description():
         "License :: OSI Approved :: Apache Software License",
         "Operating System :: POSIX :: Linux",
         "Programming Language :: Python",
-        "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",