diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 045abcc4..6c8e52d9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,21 +11,22 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  BUILDER_VERSION: v0.9.64
+  BUILDER_VERSION: v0.9.72
   BUILDER_SOURCE: releases
   BUILDER_HOST: https://d19elf31gohf1l.cloudfront.net
   PACKAGE_NAME: aws-c-s3
   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_DEFAULT_REGION: ${{ secrets.AWS_DEFAULT_REGION }}
-  AWS_REGION: us-east-1
+  CRT_CI_ROLE: ${{ secrets.CRT_CI_ROLE_ARN }}
+  AWS_DEFAULT_REGION: us-east-1
   CTEST_PARALLEL_LEVEL: 2
 
+permissions:
+  id-token: write # This is required for requesting the JWT
+
 jobs:
   linux-compat:
-    runs-on: ubuntu-20.04 # latest
+    runs-on: ubuntu-24.04 # latest
     strategy:
       fail-fast: false
       matrix:
@@ -36,6 +37,10 @@ jobs:
           - manylinux2014-x86
           - 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: Checkout Sources
       uses: actions/checkout@v4
         # We can't use the `uses: docker://image` version yet, GitHub lacks authentication for actions -> packages
@@ -45,7 +50,7 @@ jobs:
         ./linux-container-ci.sh ${{ env.BUILDER_VERSION }} aws-crt-${{ matrix.image }} build -p ${{ env.PACKAGE_NAME }}
 
   linux-compiler-compat:
-    runs-on: ubuntu-22.04 # latest
+    runs-on: ubuntu-24.04 # latest
     strategy:
       fail-fast: false
       matrix:
@@ -56,52 +61,76 @@ 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 TODO: figure out why its not passing
     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 ${{ env.PACKAGE_NAME }} --compiler=${{ matrix.compiler }} --cmake-extra=-DASSERT_LOCK_HELD=ON --cmake-extra=-DAWS_ENABLE_S3_ENDPOINT_RESOLVER=ON
+    - 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 ${{ env.PACKAGE_NAME }} --compiler=${{ matrix.compiler }} --cmake-extra=-DASSERT_LOCK_HELD=ON --cmake-extra=-DAWS_ENABLE_S3_ENDPOINT_RESOLVER=ON
 
   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 }}" --cmake-extra=-DASSERT_LOCK_HELD=ON
+    - 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 }}" --cmake-extra=-DASSERT_LOCK_HELD=ON
 
   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
-      - 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 }} --cmake-extra=-DBUILD_SHARED_LIBS=ON --cmake-extra=-DASSERT_LOCK_HELD=ON
+    - 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 }} --cmake-extra=-DBUILD_SHARED_LIBS=ON --cmake-extra=-DASSERT_LOCK_HELD=ON
 
   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
-      - 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 }} --cmake-extra=-DBYO_CRYPTO=ON --cmake-extra=-DASSERT_LOCK_HELD=ON
+    - 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 }} --cmake-extra=-DBYO_CRYPTO=ON --cmake-extra=-DASSERT_LOCK_HELD=ON
 
   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')"
@@ -114,6 +143,10 @@ 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')"
@@ -122,6 +155,10 @@ 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')"
@@ -130,6 +167,10 @@ 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')"
@@ -141,6 +182,10 @@ 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: Checkout Sources
       uses: actions/checkout@v4
     - name: Build ${{ env.PACKAGE_NAME }} + consumers
@@ -154,6 +199,10 @@ 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: Checkout Sources
       uses: actions/checkout@v4
     - name: Build ${{ env.PACKAGE_NAME }} + consumers
@@ -165,17 +214,25 @@ 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 }}
 
   linux-debug:
-    runs-on: ubuntu-22.04 # latest
+    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
diff --git a/.github/workflows/codecov.yml b/.github/workflows/codecov.yml
index c50db378..8eff37f4 100644
--- a/.github/workflows/codecov.yml
+++ b/.github/workflows/codecov.yml
@@ -5,24 +5,29 @@ on:
 
 
 env:
-  BUILDER_VERSION: v0.9.55
+  BUILDER_VERSION: v0.9.72
   BUILDER_SOURCE: releases
   BUILDER_HOST: https://d19elf31gohf1l.cloudfront.net
   PACKAGE_NAME: aws-c-s3
   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_DEFAULT_REGION: ${{ secrets.AWS_DEFAULT_REGION }}
-  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:
   codecov-linux:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     steps:
-      - name: Checkout Sources
-        uses: actions/checkout@v4
-      - 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')"
-          chmod a+x builder
-          ./builder build -p ${{ env.PACKAGE_NAME }} --compiler=gcc-9 --cmake-extra=-DASSERT_LOCK_HELD=ON --coverage --coverage-exclude=source/s3_copy_object.c
+    - uses: aws-actions/configure-aws-credentials@v4
+      with:
+        role-to-assume: ${{ env.CRT_CI_ROLE }}
+        aws-region: ${{ env.AWS_DEFAULT_REGION }}
+    - name: Checkout Sources
+      uses: actions/checkout@v4
+    - 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')"
+        chmod a+x builder
+        ./builder build -p ${{ env.PACKAGE_NAME }} --compiler=gcc-9 --cmake-extra=-DASSERT_LOCK_HELD=ON --coverage --coverage-exclude=source/s3_copy_object.c