diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f9774c160..0ef1363de 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,19 +6,21 @@ on:
       - 'main'
 
 env:
-  BUILDER_VERSION: v0.9.62
+  BUILDER_VERSION: v0.9.72
   BUILDER_SOURCE: releases
   BUILDER_HOST: https://d19elf31gohf1l.cloudfront.net
   PACKAGE_NAME: aws-c-io
   LINUX_BASE_IMAGE: ubuntu-18-x64
   RUN: ${{ github.run_id }}-${{ github.run_number }}
-  AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
-  AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
-  AWS_REGION: us-east-1
+  CRT_CI_ROLE: ${{ secrets.CRT_CI_ROLE_ARN }}
+  AWS_DEFAULT_REGION: us-east-1
+
+permissions:
+  id-token: write # This is required for requesting the JWT
 
 jobs:
   linux-compat:
-    runs-on: ubuntu-22.04 # latest
+    runs-on: ubuntu-24.04 # latest
     strategy:
       fail-fast: false
       matrix:
@@ -32,15 +34,23 @@ jobs:
           - rhel8-x64
           - al2-x64
     steps:
+    - uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: ${{ env.CRT_CI_ROLE }}
+        aws-region: ${{ env.AWS_DEFAULT_REGION }}
     - name: Build ${{ env.PACKAGE_NAME }}
       run: |
         aws s3 cp s3://aws-crt-test-stuff/ci/${{ env.BUILDER_VERSION }}/linux-container-ci.sh ./linux-container-ci.sh && chmod a+x ./linux-container-ci.sh
         ./linux-container-ci.sh ${{ env.BUILDER_VERSION }} aws-crt-${{ matrix.image }} build -p ${{ env.PACKAGE_NAME }}
 
   linux-byo-crypto:
-    runs-on: ubuntu-22.04 # latest
+    runs-on: ubuntu-24.04 # latest
     steps:
-       # We can't use the `uses: docker://image` version yet, GitHub lacks authentication for actions -> packages
+    - uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: ${{ env.CRT_CI_ROLE }}
+        aws-region: ${{ env.AWS_DEFAULT_REGION }}
+    # We can't use the `uses: docker://image` version yet, GitHub lacks authentication for actions -> packages
     - name: Build ${{ env.PACKAGE_NAME }} + consumers
       run: |
         aws s3 cp s3://aws-crt-test-stuff/ci/${{ env.BUILDER_VERSION }}/linux-container-ci.sh ./linux-container-ci.sh && chmod a+x ./linux-container-ci.sh
@@ -57,13 +67,21 @@ jobs:
           - clang-9
           - clang-10
           - clang-11
+          - clang-15
+          - clang-17
           - gcc-4.8
           - gcc-5
           - gcc-6
           - gcc-7
           - gcc-8
+          - gcc-11
+          - gcc-13
     steps:
-        # We can't use the `uses: docker://image` version yet, GitHub lacks authentication for actions -> packages
+    - uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: ${{ env.CRT_CI_ROLE }}
+        aws-region: ${{ env.AWS_DEFAULT_REGION }}
+    # We can't use the `uses: docker://image` version yet, GitHub lacks authentication for actions -> packages
     - name: Build ${{ env.PACKAGE_NAME }}
       run: |
         aws s3 cp s3://aws-crt-test-stuff/ci/${{ env.BUILDER_VERSION }}/linux-container-ci.sh ./linux-container-ci.sh && chmod a+x ./linux-container-ci.sh
@@ -72,28 +90,40 @@ jobs:
   linux-debug:
     runs-on: ubuntu-24.04 # latest
     steps:
+    - uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: ${{ env.CRT_CI_ROLE }}
+        aws-region: ${{ env.AWS_DEFAULT_REGION }}
     - name: Build ${{ env.PACKAGE_NAME }}
       run: |
         aws s3 cp s3://aws-crt-test-stuff/ci/${{ env.BUILDER_VERSION }}/linux-container-ci.sh ./linux-container-ci.sh && chmod a+x ./linux-container-ci.sh
         ./linux-container-ci.sh ${{ env.BUILDER_VERSION }} aws-crt-${{ env.LINUX_BASE_IMAGE }} build -p ${{ env.PACKAGE_NAME }} --config Debug
 
   clang-sanitizers:
-    runs-on: ubuntu-22.04 # latest
+    runs-on: ubuntu-24.04 # latest
     strategy:
       fail-fast: false
       matrix:
         sanitizers: [",thread", ",address,undefined"]
     steps:
-      # We can't use the `uses: docker://image` version yet, GitHub lacks authentication for actions -> packages
-      - name: Build ${{ env.PACKAGE_NAME }}
-        run: |
-          aws s3 cp s3://aws-crt-test-stuff/ci/${{ env.BUILDER_VERSION }}/linux-container-ci.sh ./linux-container-ci.sh && chmod a+x ./linux-container-ci.sh
-          ./linux-container-ci.sh ${{ env.BUILDER_VERSION }} aws-crt-${{ env.LINUX_BASE_IMAGE }} build -p ${{ env.PACKAGE_NAME }} --compiler=clang-11 --cmake-extra=-DENABLE_SANITIZERS=ON --cmake-extra=-DSANITIZERS="${{ matrix.sanitizers }}"
+    - uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: ${{ env.CRT_CI_ROLE }}
+        aws-region: ${{ env.AWS_DEFAULT_REGION }}
+    # We can't use the `uses: docker://image` version yet, GitHub lacks authentication for actions -> packages
+    - name: Build ${{ env.PACKAGE_NAME }}
+      run: |
+        aws s3 cp s3://aws-crt-test-stuff/ci/${{ env.BUILDER_VERSION }}/linux-container-ci.sh ./linux-container-ci.sh && chmod a+x ./linux-container-ci.sh
+        ./linux-container-ci.sh ${{ env.BUILDER_VERSION }} aws-crt-${{ env.LINUX_BASE_IMAGE }} build -p ${{ env.PACKAGE_NAME }} --compiler=clang-11 --cmake-extra=-DENABLE_SANITIZERS=ON --cmake-extra=-DSANITIZERS="${{ matrix.sanitizers }}"
 
   linux-shared-libs:
-    runs-on: ubuntu-22.04 # latest
+    runs-on: ubuntu-24.04 # latest
     steps:
-        # We can't use the `uses: docker://image` version yet, GitHub lacks authentication for actions -> packages
+    - uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: ${{ env.CRT_CI_ROLE }}
+        aws-region: ${{ env.AWS_DEFAULT_REGION }}
+    # We can't use the `uses: docker://image` version yet, GitHub lacks authentication for actions -> packages
     - name: Build ${{ env.PACKAGE_NAME }}
       run: |
         aws s3 cp s3://aws-crt-test-stuff/ci/${{ env.BUILDER_VERSION }}/linux-container-ci.sh ./linux-container-ci.sh && chmod a+x ./linux-container-ci.sh
@@ -102,17 +132,25 @@ jobs:
   # Test downstream repos.
   # This should not be required because we can run into a chicken and egg problem if there is a change that needs some fix in a downstream repo.
   downstream:
-    runs-on: ubuntu-22.04 # latest
+    runs-on: ubuntu-24.04 # latest
     steps:
-      # We can't use the `uses: docker://image` version yet, GitHub lacks authentication for actions -> packages
-      - name: Build ${{ env.PACKAGE_NAME }}
-        run: |
-          aws s3 cp s3://aws-crt-test-stuff/ci/${{ env.BUILDER_VERSION }}/linux-container-ci.sh ./linux-container-ci.sh && chmod a+x ./linux-container-ci.sh
-          ./linux-container-ci.sh ${{ env.BUILDER_VERSION }} aws-crt-${{ env.LINUX_BASE_IMAGE }} build downstream -p ${{ env.PACKAGE_NAME }}
+    - uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: ${{ env.CRT_CI_ROLE }}
+        aws-region: ${{ env.AWS_DEFAULT_REGION }}
+    # We can't use the `uses: docker://image` version yet, GitHub lacks authentication for actions -> packages
+    - name: Build ${{ env.PACKAGE_NAME }}
+      run: |
+        aws s3 cp s3://aws-crt-test-stuff/ci/${{ env.BUILDER_VERSION }}/linux-container-ci.sh ./linux-container-ci.sh && chmod a+x ./linux-container-ci.sh
+        ./linux-container-ci.sh ${{ env.BUILDER_VERSION }} aws-crt-${{ env.LINUX_BASE_IMAGE }} build downstream -p ${{ env.PACKAGE_NAME }}
 
   windows:
     runs-on: windows-2022 # latest
     steps:
+    - uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: ${{ env.CRT_CI_ROLE }}
+        aws-region: ${{ env.AWS_DEFAULT_REGION }}
     - name: Build ${{ env.PACKAGE_NAME }} + consumers
       run: |
         python -c "from urllib.request import urlretrieve; urlretrieve('${{ env.BUILDER_HOST }}/${{ env.BUILDER_SOURCE }}/${{ env.BUILDER_VERSION }}/builder.pyz?run=${{ env.RUN }}', 'builder.pyz')"
@@ -121,6 +159,10 @@ jobs:
   windows-debug:
     runs-on: windows-2022 # latest
     steps:
+    - uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: ${{ env.CRT_CI_ROLE }}
+        aws-region: ${{ env.AWS_DEFAULT_REGION }}
     - name: Build ${{ env.PACKAGE_NAME }} + consumers
       run: |
         python -c "from urllib.request import urlretrieve; urlretrieve('${{ env.BUILDER_HOST }}/${{ env.BUILDER_SOURCE }}/${{ env.BUILDER_VERSION }}/builder.pyz?run=${{ env.RUN }}', 'builder.pyz')"
@@ -132,6 +174,10 @@ jobs:
       matrix:
         arch: [x86, x64]
     steps:
+    - uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: ${{ env.CRT_CI_ROLE }}
+        aws-region: ${{ env.AWS_DEFAULT_REGION }}
     - name: Build ${{ env.PACKAGE_NAME }} + consumers
       run: |
         python -c "from urllib.request import urlretrieve; urlretrieve('${{ env.BUILDER_HOST }}/${{ env.BUILDER_SOURCE }}/${{ env.BUILDER_VERSION }}/builder.pyz?run=${{ env.RUN }}', 'builder.pyz')"
@@ -140,6 +186,10 @@ jobs:
   windows-shared-libs:
     runs-on: windows-2022 # latest
     steps:
+    - uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: ${{ env.CRT_CI_ROLE }}
+        aws-region: ${{ env.AWS_DEFAULT_REGION }}
     - name: Build ${{ env.PACKAGE_NAME }} + consumers
       run: |
         python -c "from urllib.request import urlretrieve; urlretrieve('${{ env.BUILDER_HOST }}/${{ env.BUILDER_SOURCE }}/${{ env.BUILDER_VERSION }}/builder.pyz?run=${{ env.RUN }}', 'builder.pyz')"
@@ -148,6 +198,10 @@ jobs:
   windows-app-verifier:
     runs-on: windows-2022 # latest
     steps:
+    - uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: ${{ env.CRT_CI_ROLE }}
+        aws-region: ${{ env.AWS_DEFAULT_REGION }}
     - name: Build ${{ env.PACKAGE_NAME }} + consumers
       run: |
         python -c "from urllib.request import urlretrieve; urlretrieve('${{ env.BUILDER_HOST }}/${{ env.BUILDER_SOURCE }}/${{ env.BUILDER_VERSION }}/builder.pyz?run=${{ env.RUN }}', 'builder.pyz')"
@@ -159,6 +213,10 @@ jobs:
   macos:
     runs-on: macos-14 # latest
     steps:
+    - uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: ${{ env.CRT_CI_ROLE }}
+        aws-region: ${{ env.AWS_DEFAULT_REGION }}
     - name: Build ${{ env.PACKAGE_NAME }} + consumers
       run: |
         python3 -c "from urllib.request import urlretrieve; urlretrieve('${{ env.BUILDER_HOST }}/${{ env.BUILDER_SOURCE }}/${{ env.BUILDER_VERSION }}/builder.pyz?run=${{ env.RUN }}', 'builder')"
@@ -168,6 +226,10 @@ jobs:
   macos-x64:
     runs-on: macos-14-large # latest
     steps:
+    - uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: ${{ env.CRT_CI_ROLE }}
+        aws-region: ${{ env.AWS_DEFAULT_REGION }}
     - name: Build ${{ env.PACKAGE_NAME }} + consumers
       run: |
         python3 -c "from urllib.request import urlretrieve; urlretrieve('${{ env.BUILDER_HOST }}/${{ env.BUILDER_SOURCE }}/${{ env.BUILDER_VERSION }}/builder.pyz?run=${{ env.RUN }}', 'builder')"
@@ -177,6 +239,10 @@ jobs:
   macos-debug:
     runs-on: macos-14 # latest
     steps:
+    - uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: ${{ env.CRT_CI_ROLE }}
+        aws-region: ${{ env.AWS_DEFAULT_REGION }}
     - name: Build ${{ env.PACKAGE_NAME }} + consumers
       run: |
         python3 -c "from urllib.request import urlretrieve; urlretrieve('${{ env.BUILDER_HOST }}/${{ env.BUILDER_SOURCE }}/${{ env.BUILDER_VERSION }}/builder.pyz?run=${{ env.RUN }}', 'builder')"
@@ -184,39 +250,47 @@ jobs:
         ./builder build -p ${{ env.PACKAGE_NAME }} --config Debug
 
   freebsd:
-    runs-on: ubuntu-22.04  # latest
-    steps:
-      - uses: actions/checkout@v4
-      - name: Build ${{ env.PACKAGE_NAME }} + consumers
-        id: test
-        uses: cross-platform-actions/action@v0.23.0
-        with:
-          operating_system: freebsd
-          architecture: x86-64
-          version: '14.0'
-          cpu_count: 4
-          shell: bash
-          run: |
-            sudo pkg install -y python3 net/py-urllib3
-            python3 -c "from urllib.request import urlretrieve; urlretrieve('${{ env.BUILDER_HOST }}/${{ env.BUILDER_SOURCE }}/${{ env.BUILDER_VERSION }}/builder.pyz?run=${{ env.RUN }}', 'builder')"
-            chmod a+x builder
-            ./builder build -p ${{ env.PACKAGE_NAME }}
+    runs-on: ubuntu-24.04  # latest
+    steps:
+    - uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: ${{ env.CRT_CI_ROLE }}
+        aws-region: ${{ env.AWS_DEFAULT_REGION }}
+    - uses: actions/checkout@v4
+    - name: Build ${{ env.PACKAGE_NAME }} + consumers
+      id: test
+      uses: cross-platform-actions/action@v0.23.0
+      with:
+        operating_system: freebsd
+        architecture: x86-64
+        version: '14.0'
+        cpu_count: 4
+        shell: bash
+        run: |
+          sudo pkg install -y python3 net/py-urllib3
+          python3 -c "from urllib.request import urlretrieve; urlretrieve('${{ env.BUILDER_HOST }}/${{ env.BUILDER_SOURCE }}/${{ env.BUILDER_VERSION }}/builder.pyz?run=${{ env.RUN }}', 'builder')"
+          chmod a+x builder
+          ./builder build -p ${{ env.PACKAGE_NAME }}
 
   openbsd:
-    runs-on: ubuntu-22.04 # latest
+    runs-on: ubuntu-24.04 # latest
     steps:
-      - uses: actions/checkout@v4
-      - name: Build ${{ env.PACKAGE_NAME }} + consumers
-        id: test
-        uses: cross-platform-actions/action@v0.23.0
-        with:
-          operating_system: openbsd
-          architecture: x86-64
-          version: '7.4'
-          cpu_count: 4
-          shell: bash
-          run: |
-            sudo pkg_add py3-urllib3
-            python3 -c "from urllib.request import urlretrieve; urlretrieve('${{ env.BUILDER_HOST }}/${{ env.BUILDER_SOURCE }}/${{ env.BUILDER_VERSION }}/builder.pyz?run=${{ env.RUN }}', 'builder')"
-            chmod a+x builder
-            ./builder build -p ${{ env.PACKAGE_NAME }}
+    - uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: ${{ env.CRT_CI_ROLE }}
+        aws-region: ${{ env.AWS_DEFAULT_REGION }}
+    - uses: actions/checkout@v4
+    - name: Build ${{ env.PACKAGE_NAME }} + consumers
+      id: test
+      uses: cross-platform-actions/action@v0.23.0
+      with:
+        operating_system: openbsd
+        architecture: x86-64
+        version: '7.4'
+        cpu_count: 4
+        shell: bash
+        run: |
+          sudo pkg_add py3-urllib3
+          python3 -c "from urllib.request import urlretrieve; urlretrieve('${{ env.BUILDER_HOST }}/${{ env.BUILDER_SOURCE }}/${{ env.BUILDER_VERSION }}/builder.pyz?run=${{ env.RUN }}', 'builder')"
+          chmod a+x builder
+          ./builder build -p ${{ env.PACKAGE_NAME }}
diff --git a/.github/workflows/proof-alarm.yml b/.github/workflows/proof-alarm.yml
index 4e33d77f7..50e94db77 100644
--- a/.github/workflows/proof-alarm.yml
+++ b/.github/workflows/proof-alarm.yml
@@ -7,11 +7,11 @@ on: [push]
 jobs:
   check-for-changes:
 
-    runs-on: ubuntu-20.04 # latest
+    runs-on: ubuntu-24.04 # latest
 
     steps:
     - name: Checkout Sources
-      uses: actions/checkout@v1
+      uses: actions/checkout@v4
 
     - name: Check
       run: |