A national architecture and engineering firm of 400+ professionals (formerly Harley Ellis Devereaux), headquartered in Royal Oak, Michigan. Its engineering group includes in-house fire protection engineering under a designated Fire Protection Leader, covering fire suppression, egress and water-supply design, emergency systems and building/fire-life-safety code compliance, integrated with its mechanical and plumbing design — fire and life-safety work that supports the professional design and approvals process rather than substituting for professional judgement.