diff --git a/makeUMPIRE b/makeUMPIRE
new file mode 100755
index 0000000..de3c951
--- /dev/null
+++ b/makeUMPIRE
@@ -0,0 +1,233 @@
+#!/bin/sh
+#------------------------------------------------------------------------------
+# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+#  \\    /   O peration     |
+#   \\  /    A nd           | www.openfoam.com
+#    \\/     M anipulation  |
+#------------------------------------------------------------------------------
+#     Copyright (C) 2025 OpenCFD Ltd.
+#------------------------------------------------------------------------------
+# License
+#     This file is part of OpenFOAM, distributed under GPL-3.0-or-later.
+#
+# Script
+#     makeUMPIRE
+#
+# Description
+#     Build script for UMPIRE
+#
+# ----------------------------------------------
+# NO USER-CONFIGURABLE SETTINGS WITHIN THIS FILE
+#------------------------------------------------------------------------------
+# Dynamic library ending (default is .so)
+[ "$(uname -s)" = Darwin ] && EXT_SO=.dylib || EXT_SO=.so
+
+# Short-circuit test for an installation
+if [ "$1" = "-test" ]
+then
+    [ "$#" -eq 2 ] || { echo "${0##*/} -test : needs 1 argument"; exit 1; }
+    dir="${2%/}" # <- *_ARCH_PATH
+    [ -d "$dir/include/umpire" ] || exit 2
+
+    package="umpire"
+    libStatic="libumpire.a"
+    for lib in \
+        "$dir/lib/$libStatic" \
+        "$dir/lib$WM_COMPILER_LIB_ARCH/$libStatic" \
+        ;
+    do
+        if [ -r "$lib" ]
+        then
+            echo "    $package include: $dir/include"
+            echo "    $package library: ${lib%/*}"
+            exit 0
+        fi
+    done
+    exit 2
+fi
+#------------------------------------------------------------------------------
+if :    # Run from third-party directory
+then
+    cd "${0%/*}" || exit
+    wmakeCheckPwd "$WM_THIRD_PARTY_DIR" 2>/dev/null || {
+        echo "Error (${0##*/}) : not located in \$WM_THIRD_PARTY_DIR"
+        echo "    Check your OpenFOAM environment and installation"
+        exit 1
+    }
+fi
+. "${WM_THIRD_PARTY_DIR:?}"/etc/tools/ThirdPartyFunctions
+. "${WM_THIRD_PARTY_DIR:?}"/etc/tools/CMakeFunctions
+#------------------------------------------------------------------------------
+# Obtain version from OpenFOAM etc/config.sh file:
+_foamConfig umpire
+
+PACKAGE="${umpire_version:-none}"
+
+# Hint for cmake findMPI
+if [ -d "$MPI_ARCH_PATH" ]
+then
+    export MPI_HOME="$MPI_ARCH_PATH"
+fi
+
+#------------------------------------------------------------------------------
+printVersions() { listPackageVersions umpire; exit 0; }
+printHelp() {
+    cat<<USAGE
+
+Usage: ${0##*/} [OPTION] [umpire-VERSION]
+options:
+  -force            Force compilation, even if include/library already exists
+  -gcc              Force use of gcc/g++
+  -cmake PATH       With cmake from the given path
+  -mpi-home PATH    With hint for MPI_HOME
+  -DNAME=VALUE      add cmake variable
+  -list             List available unpacked source versions
+  -help             Display usage help
+
+* Build UMPIRE
+      ${PACKAGE:-[unspecified]}
+
+USAGE
+    showDownloadHint umpire
+    exit 0  # Clean exit
+}
+#------------------------------------------------------------------------------
+exportCompiler minimal  # Minimal compiler info for CMake/configure
+
+unset optForce
+
+# Parse options
+while [ "$#" -gt 0 ]
+do
+    case "$1" in
+    '') ;;      # Ignore empty
+    -h | -help*) printHelp;;
+    -list)      printVersions;;
+    -gcc)       useGcc  ;;
+    -force)     optForce=true ;;
+
+    -cmake)
+        [ "$#" -ge 2 ] || die "'$1' option requires an argument"
+        CMAKE_PATH="${2%%/}"
+        shift
+        ;;
+    -mpi-home) # mpi with hint
+        [ "$#" -ge 2 ] || die "'$1' option requires an argument"
+        export MPI_HOME="${2%%/}"
+        case "${MPI_HOME:-none}" in (false|none) unset MPI_HOME;; esac
+        shift
+        ;;
+
+    umpire/* | sources/umpire* | umpire-[0-9]* | umpire-git*)
+        PACKAGE="${1%%/}"
+        ;;
+    -D[A-Z]*=* | [A-Z]*=*)  # cmake variables
+        addCMakeVariable "$1"
+        ;;
+    *)
+        die "unknown option/argument: '$1'"
+        ;;
+    esac
+    shift
+done
+
+if [ -z "$PACKAGE" ]
+then
+    die "The UMPIRE package/version not specified"
+elif _foamIsNone "$PACKAGE" || _foamIsSystem "$PACKAGE"
+then
+    echo "Using none/system (skip ThirdParty build of UMPIRE)"
+    exit 0
+fi
+
+# Known build issues for mingw (various things)
+case "$WM_COMPILER" in
+(Mingw*)
+    if [ "$optForce" = true ]
+    then
+        echo "Warning: umpire - not tested with $WM_COMPILER"
+    else
+        echo "Skipping umpire - not tested with $WM_COMPILER"
+        exit 0
+    fi
+    ;;
+esac
+
+#------------------------------------------------------------------------------
+#
+# Build UMPIRE
+#   *PACKAGE : name-version of the package
+#   *SOURCE  : location of original sources
+#   *PREFIX  : installation directory
+
+PKG_SOURCE="$(findSourceDir "$PACKAGE")"
+PACKAGE="$(basename "$PACKAGE")"
+PKG_PREFIX="$installBASE/$PACKAGE"
+export GIT_DIR="$PKG_SOURCE/.git"
+
+echo
+echo ========================================
+echo "Build umpire library $PACKAGE"
+echo
+
+if [ -z "$optForce" ] \
+&& [ -f "$PKG_PREFIX/include/umpire/Umpire.hpp" ] \
+&& {
+    [ -r "$PKG_PREFIX/lib/libumpire.a" ] \
+ || [ -r "$PKG_PREFIX/lib$WM_COMPILER_LIB_ARCH/libumpire.a" ]
+}
+then
+    echo "    UMPIRE already built : $PKG_PREFIX"
+else
+    # CMake options often lag the configure ones
+    echo "Starting build: $PACKAGE (using cmake)"
+    echo
+    (
+        PKG_BUILD="$buildBASE/$PACKAGE"
+        cd "$PKG_SOURCE" || exit
+
+        applyPatch "$PACKAGE" "$PKG_SOURCE"
+
+        # Remove any existing build folder and recreate
+        rm -rf "$PKG_PREFIX"
+        rm -rf "$PKG_BUILD"
+        mkdir -p "$PKG_BUILD"
+
+        # With MPI?
+        # -DENABLE_FIND_MPI=ON
+
+        cmake=$(findCMake)
+
+        # By default installs into lib64/,
+        # but libcamp installs into lib/ so use that here as well !
+        #
+        # Also note that the umpire currently (2025-04-03) doesn't properly
+        # handle a relative directory for CMAKE_INSTALL_LIBDIR
+        # (https://github.com/LLNL/Umpire/issues/952)
+
+        libdir="$PKG_PREFIX/lib"
+
+        cd "$PKG_BUILD" && set -x && \
+        ${cmake:?} \
+            -DCMAKE_INSTALL_PREFIX="$PKG_PREFIX" \
+            -DCMAKE_INSTALL_LIBDIR="$libdir" \
+            -DCMAKE_BUILD_TYPE=Release \
+            -DCAMP_ENABLE_TESTS=OFF \
+            -DENABLE_ASTYLE=OFF \
+            -DENABLE_DOCS=OFF \
+            -DENABLE_DOXYGEN=OFF \
+            -DENABLE_EXAMPLES=OFF \
+            -DENABLE_FORTRAN=OFF \
+            -DENABLE_TESTS=OFF \
+            ${WM_QUIET:+-DCMAKE_RULE_MESSAGES=OFF} \
+            "$PKG_SOURCE" \
+        && make -j $WM_NCOMPPROCS all \
+        && make install \
+        && echo "Built: $PACKAGE"
+    ) || {
+        echo "Error building: $PACKAGE"
+        exit 1
+    }
+fi
+
+# -----------------------------------------------------------------------------