Typical responsibilities include work performed directly or under supervision related to site selection, master planning, load calculations, utility assessments, energy modeling, commissioning and start‑up, design reports, code evaluations, plans, P&IDs, schedules, HAZOP reviews, installation details, and equipment/system selection and specification. The Mechanical Engineer IV leads design execution across all phases, including studies, conceptual and schematic design, design development, construction documentation, and construction administration.