ISI seeks an experienced Construction Mechanical Engineer with specialized expertise in boiler plants, steam systems, and high-pressure piping to support major infrastructure upgrades at the Loch Raven VA Medical Center. This role provides full-time onsite Owner’s Representative support during planning, construction, testing, and closeout of a new Boiler Plant. The Mechanical Engineer will oversee installation work, review technical documentation, support commissioning, and ensure all mechanical systems meet VA standards, industry codes, and project requirements.