diff --git a/.circleci/config.yml b/.circleci/config.yml
deleted file mode 100644
index a8903d43..00000000
--- a/.circleci/config.yml
+++ /dev/null
@@ -1,69 +0,0 @@
-# Use the latest 2.1 version of CircleCI pipeline process engine.
-# See: https://circleci.com/docs/2.0/configuration-reference
-version: 2.1
-orbs:
-  jq: circleci/jq@2.2.0
-
-description: |
-  Run end-to-end integration tests between deno-slack-sdk, Slack Platform CLI and other Slack app development tooling.
-
-jobs:
-  e2e-test:
-    docker:
-      - image: cimg/base:current
-    parameters:
-      e2e_target_branch:
-        type: string
-        description: "What branch of the integration test repo should be used to test the CLI?"
-        default: main
-      sdk_branch:
-        type: string
-        description: "What deno-slack-sdk branch should be used during testing?"
-        default: main
-    steps:
-      - checkout
-      - run:
-          name: Kick off platform-devpx-test pipeline
-          command: |
-            IMPORT_URL="https://raw.githubusercontent.com/slackapi/deno-slack-sdk/refs/heads/<< parameters.sdk_branch >>/src/";
-            # https://app.circleci.com/settings/organization/github/slackapi/contexts
-            TEST_JOB_WORKFLOW_ID=$(curl --location --request POST 'https://circleci.com/api/v2/project/gh/slackapi/platform-devxp-test/pipeline' \
-            --header 'Content-Type: application/json' \
-            -u "${FIL_CIRCLECI_PERSONAL_TOKEN}:" \
-            --data "{\"branch\":\"<< parameters.e2e_target_branch >>\",\"parameters\":{\"deno_sdk_import_url\":\"${IMPORT_URL}\"}}" | jq '.id')
-            echo "e2e test workflow started with id: $TEST_JOB_WORKFLOW_ID"
-            echo "export TEST_JOB_WORKFLOW_ID=${TEST_JOB_WORKFLOW_ID}" >> $BASH_ENV
-      - run:
-          name: Wait for platform-devxp-test E2E run to complete
-          command: |
-            E2E_RESULT="{}"
-            E2E_STATUS="running"
-            # possible status values: success, running, not_run, failed, error, failing, on_hold, canceled, unauthorized
-            while [[ $E2E_STATUS != "failed" && $E2E_STATUS != "canceled" && $E2E_STATUS != "success" && $E2E_STATUS != "not_run" && $E2E_STATUS != "error" && $E2E_STATUS != "unauthorized" ]]
-            do
-              sleep 30s
-              echo "Polling test job ${TEST_JOB_WORKFLOW_ID}..."
-              E2E_RESULT=$(curl --location -sS --request GET "https://circleci.com/api/v2/pipeline/$TEST_JOB_WORKFLOW_ID/workflow" --header "Circle-Token: $FIL_CIRCLECI_PERSONAL_TOKEN")
-              E2E_STATUS=$(echo $E2E_RESULT | jq --raw-output '.items[0].status')
-              echo "Status is now: $E2E_STATUS"
-            done
-            if [ $E2E_STATUS = "failed" ] || [ $E2E_STATUS = "error" ]; then
-              E2E_PIPE_NUM=$(echo $E2E_RESULT | jq '.items[0].pipeline_number')
-              E2E_WORKFLOW_ID=$(echo $E2E_RESULT | jq -r '.items[0].id')
-              CIRCLE_FAIL_LINK="https://app.circleci.com/pipelines/github/slackapi/platform-devxp-test/${E2E_PIPE_NUM}/workflows/${E2E_WORKFLOW_ID}"
-              echo "Tests failed! Visit $CIRCLE_FAIL_LINK for more info."
-              exit 1
-            elif [ "$E2E_STATUS" = "canceled" ] || [ "$E2E_STATUS" = "unauthorized" ] || [ $E2E_STATUS = "not_run" ]; then
-              echo "Tests have been ${E2E_STATUS} and did not finish!"
-              exit 1
-            else
-              echo "Tests passed woot 🎉"
-            fi
-
-workflows:
-  e2e-test:
-    jobs:
-      - e2e-test:
-          e2e_target_branch: "main"
-          sdk_branch: << pipeline.git.branch >>
-          context: slack-cli-e2e
diff --git a/.github/workflows/e2e.yml b/.github/workflows/e2e.yml
new file mode 100644
index 00000000..f1a5854e
--- /dev/null
+++ b/.github/workflows/e2e.yml
@@ -0,0 +1,71 @@
+# This workflow invokes and waits for the result of Slack's private E2E CI system
+name: Internal E2E CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  e2e:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the sdk
+        uses: actions/checkout@v4
+      - name: Set environment variables
+        run: |
+          # Short name for current branch. For PRs, use source branch (GITHUB_HEAD_REF)
+          GIT_BRANCH=${GITHUB_HEAD_REF:-${GITHUB_REF#refs/heads/}}
+          echo "Identified deno-slack-sdk branch name: ${GIT_BRANCH}; will invoke CI system to test this branch.";
+          echo "GIT_BRANCH=$GIT_BRANCH" >> $GITHUB_ENV
+      - name: Kick off platform-devpx-test pipeline
+        env:
+          CCI_PAT: ${{ secrets.CCHEN_CIRCLECI_PERSONAL_TOKEN }}
+        run: |
+          IMPORT_URL="https://raw.githubusercontent.com/slackapi/deno-slack-sdk/refs/heads/${GIT_BRANCH}/src/";
+          echo "Import URL: ${IMPORT_URL}";
+          # https://app.circleci.com/settings/organization/github/slackapi/contexts
+          TEST_PAYLOAD=$(curl --location --request POST 'https://circleci.com/api/v2/project/gh/slackapi/platform-devxp-test/pipeline' \
+          --header 'Content-Type: application/json' \
+          -u "${CCI_PAT}:" \
+          --data "{\"branch\":\"main\",\"parameters\":{\"deno_sdk_import_url\":\"${IMPORT_URL}\"}}")
+          echo $TEST_PAYLOAD;
+          TEST_JOB_WORKFLOW_ID=$(echo $TEST_PAYLOAD | jq --raw-output '.id');
+          if [ $TEST_JOB_WORKFLOW_ID = "null" ]; then
+            echo "Problem extracting job ID from invocation API call! Aborting!";
+            exit 1;
+          fi
+          echo "e2e test workflow started with id: $TEST_JOB_WORKFLOW_ID"
+          echo "TEST_JOB_WORKFLOW_ID=${TEST_JOB_WORKFLOW_ID}" >> $GITHUB_ENV
+      - name: Wait for platform-devxp-test E2E run to complete
+        env:
+          CCI_PAT: ${{ secrets.CCHEN_CIRCLECI_PERSONAL_TOKEN }}
+        run: |
+          E2E_RESULT="{}"
+          E2E_STATUS="running"
+          # possible status values: success, running, not_run, failed, error, failing, on_hold, canceled, unauthorized
+          while [[ $E2E_STATUS != "failed" && $E2E_STATUS != "canceled" && $E2E_STATUS != "success" && $E2E_STATUS != "not_run" && $E2E_STATUS != "error" && $E2E_STATUS != "unauthorized" ]]
+          do
+            sleep 30s
+            echo "Polling test job ${TEST_JOB_WORKFLOW_ID}..."
+            E2E_RESULT=$(curl --location -sS --request GET "https://circleci.com/api/v2/pipeline/${TEST_JOB_WORKFLOW_ID}/workflow" --header "Circle-Token: ${CCI_PAT}")
+            echo $E2E_RESULT;
+            E2E_STATUS=$(echo $E2E_RESULT | jq --raw-output '.items[0].status')
+            if [ $E2E_STATUS = "null" ]; then
+              echo "Problem extracting status from workflow API! Aborting!";
+              exit 1
+            fi
+            echo "Status is now: $E2E_STATUS"
+          done
+          if [ $E2E_STATUS = "failed" ] || [ $E2E_STATUS = "error" ]; then
+            E2E_PIPE_NUM=$(echo $E2E_RESULT | jq '.items[0].pipeline_number')
+            E2E_WORKFLOW_ID=$(echo $E2E_RESULT | jq -r '.items[0].id')
+            CIRCLE_FAIL_LINK="https://app.circleci.com/pipelines/github/slackapi/platform-devxp-test/${E2E_PIPE_NUM}/workflows/${E2E_WORKFLOW_ID}"
+            echo "Tests failed! Visit $CIRCLE_FAIL_LINK for more info."
+            exit 1
+          elif [ "$E2E_STATUS" = "canceled" ] || [ "$E2E_STATUS" = "unauthorized" ] || [ $E2E_STATUS = "not_run" ]; then
+            echo "Tests have been ${E2E_STATUS} and did not finish!"
+            exit 1
+          else
+            echo "Tests passed woot 🎉"
+          fi