diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 47ae7c4..7f4e32c 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -13,7 +13,7 @@ env:
 
 jobs:
   Compile_POT3D_with_GFortran:
-    name: "Build POT3D and validate"
+    name: "Build POT3D and validate with GFortran"
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
@@ -27,13 +27,6 @@ jobs:
           micromamba-version: '2.0.4-0'
           environment-file: ci/environment_gfortran.yml
 
-      - name: Verify Environment
-        shell: bash -e -x -l {0}
-        run: |
-          echo "Active Environment: $MAMBA_DEFAULT_ENV"
-          which gfortran || { echo "gfortran not found"; exit 1; }
-          which mpif90 || { echo "mpif90 not found"; exit 1; }
-
       # build and validation with GFortran's optimization
       - name: POT3D Build and validation with GFortran with optimization (MPI only)
         shell: bash -e -x -l {0}
@@ -42,7 +35,7 @@ jobs:
           cp src/mpi_c_bindings.f90 tests/pot3d/src/
           cp src/mpi_wrapper.c tests/pot3d/src/
           cd tests/pot3d
-          FC="gfortran -O3" ./build_and_run_gfortran.sh
+          FC="gfortran -O3 -march=native" ./build_and_run_gfortran.sh
 
       # build and validation without GFortran's optimization
       - name: POT3D Build and validation with GFortran without optimization (MPI only)
@@ -53,3 +46,38 @@ jobs:
           cp src/mpi_wrapper.c tests/pot3d/src/
           cd tests/pot3d
           FC="gfortran" ./build_and_run_gfortran.sh
+
+  Compile_POT3D_with_LFortran:
+    name: "Build POT3D and validate with LFortran"
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: ["macos-latest", "ubuntu-20.04"]
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Micromamba
+        uses: mamba-org/setup-micromamba@v2.0.2
+        with:
+          micromamba-version: '2.0.4-0'
+          environment-file: ci/environment_lfortran.yml
+
+      # build and validation with LFortran's optimization
+      - name: POT3D Build and validation with LFortran with optimization (MPI only)
+        shell: bash -e -x -l {0}
+        run: |
+          cp src/mpi.f90 tests/pot3d/src/
+          cp src/mpi_c_bindings.f90 tests/pot3d/src/
+          cp src/mpi_wrapper.c tests/pot3d/src/
+          cd tests/pot3d
+          FC="lfortran --fast" ./build_and_run_lfortran.sh
+
+      # build and validation without LFortran's optimization
+      - name: POT3D Build and validation with GFortran without optimization (MPI only)
+        shell: bash -e -x -l {0}
+        run: |
+          cp src/mpi.f90 tests/pot3d/src/
+          cp src/mpi_c_bindings.f90 tests/pot3d/src/
+          cp src/mpi_wrapper.c tests/pot3d/src/
+          cd tests/pot3d
+          FC="lfortran" ./build_and_run_lfortran.sh
diff --git a/ci/environment_lfortran.yml b/ci/environment_lfortran.yml
new file mode 100644
index 0000000..047eaab
--- /dev/null
+++ b/ci/environment_lfortran.yml
@@ -0,0 +1,8 @@
+name: c_mpi_lfortran_env
+channels:
+  - conda-forge
+dependencies:
+  - lfortran=0.49.0
+  - make
+  - cmake
+  - openmpi=5.0.6
diff --git a/tests/pot3d/build_and_run_lfortran.sh b/tests/pot3d/build_and_run_lfortran.sh
new file mode 100755
index 0000000..51b5719
--- /dev/null
+++ b/tests/pot3d/build_and_run_lfortran.sh
@@ -0,0 +1,19 @@
+set -ex
+
+if [[ "$(uname)" == "Linux" ]]; then
+  CC=gcc
+else
+  CC=clang
+fi
+
+cd src
+$CC -I$CONDA_PREFIX/include -c mpi_wrapper.c
+$FC -c mpi_c_bindings.f90
+$FC -c mpi.f90
+$FC -c psi_io.f90 --no-style-warnings --no-warnings
+$FC -c --cpp --implicit-interface pot3d.F90 --no-style-warnings --no-warnings
+$FC mpi_wrapper.o mpi_c_bindings.o mpi.o psi_io.o pot3d.o -o pot3d -L$CONDA_PREFIX/lib -lmpi -Wl,-rpath,$CONDA_PREFIX/lib
+cp pot3d ../bin/
+
+cd ..
+./validate.sh