diff --git a/definition-files/omb/Singularity.omb-5.7-ubuntu-18.04-openmpi-4.0.4 b/definition-files/omb/Singularity.omb-5.7-ubuntu-18.04-openmpi-4.0.4
new file mode 100644
index 0000000000000000000000000000000000000000..20a48a2020e6e13de4b2d45156984e66d9e31ed6
--- /dev/null
+++ b/definition-files/omb/Singularity.omb-5.7-ubuntu-18.04-openmpi-4.0.4
@@ -0,0 +1,115 @@
+Bootstrap: shub
+From: mkandes/naked-singularity:ubuntu-18.04-openmpi-4.0.4
+
+%labels
+
+    APPLICATION_NAME OSU Micro-Benchmarks
+    APPLICATION_VERSION 5.7
+    APPLICATION_URL http://mvapich.cse.ohio-state.edu/benchmarks
+
+    AUTHOR_NAME Marty Kandes
+    AUTHOR_EMAIL mkandes@sdsc.edu
+
+    LAST_UPDATED 20210305
+
+%setup
+
+%environment
+
+    # Set OMB major and minor version numbers, root and
+    # installation directories
+    export OMB_ROOT_URL='http://mvapich.cse.ohio-state.edu/download/mvapich'
+    export OMB_MAJOR='5'
+    export OMB_MINOR='7'
+    export OMB_VERSION="${OMB_MAJOR}.${OMB_MINOR}"
+    export OMB_ROOT_DIR='/opt/omb'
+    export OMB_INSTALL_DIR="${OMB_ROOT_DIR}/${OMB_VERSION}"
+
+    # Set paths to OSU Microbenchmarks binaries
+    export PATH="${OMB_INSTALL_DIR}/collective:${PATH}"
+    export PATH="${OMB_INSTALL_DIR}/one-sided:${PATH}"
+    export PATH="${OMB_INSTALL_DIR}/pt2pt:${PATH}"
+    export PATH="${OMB_INSTALL_DIR}/startup:${PATH}"
+
+%post -c /bin/bash
+
+    # Set operating system mirror URL
+    export MIRRORURL='http://us.archive.ubuntu.com/ubuntu'
+
+    # Set operating system version
+    export OSVERSION='bionic'
+
+    # Set system locale
+    export LC_ALL='C'
+
+    # Set debian frontend interface
+    export DEBIAN_FRONTEND='noninteractive'
+
+    # Set Mellanox OFED version, operating system, and hardware platform
+    export MLNX_ROOT_URL='http://www.mellanox.com/downloads/ofed'
+    export MLNX_OFED_VERSION='4.7-3.2.9.0'
+    export MLNX_OS_VERSION='ubuntu18.04'
+    export MLNX_PLATFORM='x86_64'
+
+    # Set OpenMPI major, minor, and revision numbers, root and
+    # installation directories
+    export OMPI_ROOT_URL='https://download.open-mpi.org/release/open-mpi'
+    export OMPI_MAJOR='4'
+    export OMPI_MINOR='0'
+    export OMPI_REVISION='4'
+    export OMPI_VERSION="${OMPI_MAJOR}.${OMPI_MINOR}.${OMPI_REVISION}"
+    export OMPI_ROOT_DIR='/opt/openmpi'
+    export OMPI_INSTALL_DIR="${OMPI_ROOT_DIR}/${OMPI_VERSION}"
+
+    # Set paths to OpenMPI binaries and libraries
+    export PATH="${OMPI_INSTALL_DIR}/bin:${PATH}"
+    export LD_LIBRARY_PATH="${OMPI_INSTALL_DIR}/lib:${LD_LIBRARY_PATH}"
+
+    # Upgrade all software packages to their latest versions
+    apt-get -y update && apt-get -y upgrade
+
+    cd /tmp
+
+    # Set OMB major and minor version numbers, root and
+    # installation directories
+    export OMB_ROOT_URL='http://mvapich.cse.ohio-state.edu/download/mvapich'
+    export OMB_MAJOR='5'
+    export OMB_MINOR='7'
+    export OMB_VERSION="${OMB_MAJOR}.${OMB_MINOR}"
+    export OMB_ROOT_DIR='/opt/omb'
+    export OMB_INSTALL_DIR="${OMB_ROOT_DIR}/${OMB_VERSION}"
+
+    # Download, build, and install OSU Microbenchmarks
+    wget "${OMB_ROOT_URL}/osu-micro-benchmarks-${OMB_VERSION}.tar.gz"
+    tar -xf "osu-micro-benchmarks-${OMB_VERSION}.tar.gz"
+    cd "osu-micro-benchmarks-${OMB_VERSION}"
+    ./configure --prefix="${OMB_INSTALL_DIR}" CC='mpicc' CXX='mpicxx'
+    make
+    make install
+
+    # Reorganize OSU Microbenchmarks directory structure
+    cd "${OMB_INSTALL_DIR}"
+    mv libexec/osu-micro-benchmarks/mpi/collective ./
+    mv libexec/osu-micro-benchmarks/mpi/one-sided ./
+    mv libexec/osu-micro-benchmarks/mpi/pt2pt ./
+    mv libexec/osu-micro-benchmarks/mpi/startup ./
+    rm -rf libexec
+
+    cd /tmp
+
+    # Remove OMB build directory and source tarball
+    rm -rf "osu-micro-benchmarks-${OMB_VERSION}"
+    rm "osu-micro-benchmarks-${OMB_VERSION}.tar.gz"
+
+    # Cleanup
+    apt-get -y autoremove --purge
+    apt-get -y clean
+
+    # Update database for mlocate
+    updatedb
+
+%files
+
+%runscript
+
+%test