diff --git a/.github/build-ci/data/standard.json b/.github/build-ci/data/standard.json
new file mode 100644
index 000000000..3aa9594d9
--- /dev/null
+++ b/.github/build-ci/data/standard.json
@@ -0,0 +1,6 @@
+{
+    "gcc_compiler": "gcc@13.2.0",
+    "intel_compiler": "intel@2021.10.0",
+    "oneapi_compiler": "oneapi@2025.2.0",
+    "target": "x86_64"
+}
diff --git a/.github/build-ci/manifests/gcc-no-access3.spack.yaml.j2 b/.github/build-ci/manifests/gcc-no-access3.spack.yaml.j2
new file mode 100644
index 000000000..efdb30782
--- /dev/null
+++ b/.github/build-ci/manifests/gcc-no-access3.spack.yaml.j2
@@ -0,0 +1,10 @@
+spack:
+  specs:
+  - access-cice @git.{{ ref }} ~access3 io_type=PIO
+  packages:
+    all:
+      require:
+      - '%{{ gcc_compiler }} target={{ target}}'
+  concretizer:
+    unify: false
+  view: false
diff --git a/.github/build-ci/manifests/intel-access3.spack.yaml.j2 b/.github/build-ci/manifests/intel-access3.spack.yaml.j2
new file mode 100644
index 000000000..aabde6b97
--- /dev/null
+++ b/.github/build-ci/manifests/intel-access3.spack.yaml.j2
@@ -0,0 +1,13 @@
+spack:
+  specs:
+  - access-cice @git.{{ ref }} +access3 io_type=PIO
+  packages:
+    access3-share:
+      require:
+        - '@2025.03.2:' #needs https://github.com/ACCESS-NRI/access3-share/pull/9 to work on github runner
+    all:
+      require:
+      - '%{{ intel_compiler }} target={{ target }}'
+  concretizer:
+    unify: false
+  view: false
diff --git a/.github/build-ci/manifests/intel-no-access3.spack.yaml.j2 b/.github/build-ci/manifests/intel-no-access3.spack.yaml.j2
new file mode 100644
index 000000000..3bb5a6f42
--- /dev/null
+++ b/.github/build-ci/manifests/intel-no-access3.spack.yaml.j2
@@ -0,0 +1,12 @@
+spack:
+  specs:
+  - access-cice @git.{{ ref }} ~access3 io_type=PIO
+  - access-cice @git.{{ ref }} ~access3 io_type=NetCDF
+  - access-cice @git.{{ ref }} ~access3 io_type=Binary
+  packages:
+    all:
+      require:
+      - '%{{ intel_compiler }} target={{ target }}'
+  concretizer:
+    unify: false
+  view: false
diff --git a/.github/build-ci/manifests/oneapi-access3.spack.yaml.j2 b/.github/build-ci/manifests/oneapi-access3.spack.yaml.j2
new file mode 100644
index 000000000..51674c80b
--- /dev/null
+++ b/.github/build-ci/manifests/oneapi-access3.spack.yaml.j2
@@ -0,0 +1,17 @@
+spack:
+  specs:
+    - access-cice @git.{{ ref }} +access3 io_type=PIO build_type=Debug
+    - access-cice @git.{{ ref }} +access3 io_type=PIO
+  packages:
+    access3-share:
+      require:
+        - '@2025.03.2:' #needs https://github.com/ACCESS-NRI/access3-share/pull/9 to work on github runner
+    gcc-runtime:
+      require:
+      - '%gcc target={{ target }}'
+    all:
+      require:
+        - '%{{ oneapi_compiler }} target={{ target }}'
+  concretizer:
+    unify: false
+  view: false
diff --git a/.github/build-ci/manifests/oneapi-no-access3.spack.yaml.j2 b/.github/build-ci/manifests/oneapi-no-access3.spack.yaml.j2
new file mode 100644
index 000000000..dfe967b29
--- /dev/null
+++ b/.github/build-ci/manifests/oneapi-no-access3.spack.yaml.j2
@@ -0,0 +1,16 @@
+spack:
+  specs:
+    - access-cice @git.{{ ref }} ~access3 io_type=PIO +openmp
+    - access-cice @git.{{ ref }} ~access3 io_type=PIO
+    - access-cice @git.{{ ref }} ~access3 io_type=NetCDF
+    - access-cice @git.{{ ref }} ~access3 io_type=Binary
+  packages:
+    gcc-runtime:
+      require:
+      - '%gcc target={{ target }}'
+    all:
+      require:
+      - '%{{ oneapi_compiler }} target={{ target }}'
+  concretizer:
+    unify: false
+  view: false
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 000000000..e9eaae839
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,40 @@
+name: Build
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+      - CICE6.*
+jobs:
+  pre-ci:
+    name: Pre-CI
+    runs-on: ubuntu-latest
+    outputs:
+      matrix: ${{ steps.set-matrix.outputs.matrix }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up matrix
+        id: set-matrix
+        # Find all relevant files under .github/build-ci/manifests
+        # then output them as a JSON array (minus the last comma)
+        run: |
+          files=$(find .github/build-ci/manifests/ -iname '*.j2' -printf '"%p",')
+          echo "matrix=[${files%,}]" >> $GITHUB_OUTPUT
+
+  ci:
+    name: CI
+    needs: pre-ci
+    strategy:
+      fail-fast: false
+      max-parallel: 5
+      matrix:
+        file: ${{ fromJson(needs.pre-ci.outputs.matrix) }}
+    uses: access-nri/build-ci/.github/workflows/ci.yml@v2
+    with:
+      spack-manifest-path: ${{ matrix.file }}
+      allow-ssh-into-spack-install: false  # If true, PR author must ssh into instance to complete job
+      spack-manifest-data-path: .github/build-ci/data/standard.json
+      spack-packages-ref: 498242a86ca5db015403ef80fc0161e44d41223c
+      # spack-config-ref: main
+      # spack-ref: main
diff --git a/configuration/scripts/cmake/CMakeLists.txt b/configuration/scripts/cmake/CMakeLists.txt
index 0f4930678..7d5b18423 100644
--- a/configuration/scripts/cmake/CMakeLists.txt
+++ b/configuration/scripts/cmake/CMakeLists.txt
@@ -102,7 +102,7 @@ if(CICE_ACCESS3)
     message(FATAL_ERROR "ESMF interface missing from Access3Share package")  
   endif()
 else()
-  find_package(MPI REQUIRED)
+  find_package(MPI REQUIRED COMPONENTS Fortran)
 endif()
 
 if(CICE_OPENMP)
@@ -130,9 +130,11 @@ set(CICE_CORE "${CMAKE_SOURCE_DIR}/../../../cicecore")
 set(ICEPACK "${CMAKE_SOURCE_DIR}/../../../icepack")
 
 add_fortran_library(cicelib mod STATIC)
+target_compile_definitions(cicelib PRIVATE FORTRANUNDERSCORE)
+target_link_libraries(cicelib PUBLIC MPI::MPI_Fortran)
 
 if(CICE_IO MATCHES "^(NetCDF|PIO)$")
-  target_compile_definitions(cicelib PRIVATE FORTRANUNDERSCORE ncdf)
+  target_compile_definitions(cicelib PRIVATE ncdf)
   target_compile_definitions(cicelib PRIVATE USE_NETCDF)
 endif()
 if(CICE_ACCESS3)