Join a People-First, Employee-Owned Firm That's Redefining Flexibility and Growth Senior Mechanical Design Engineer (MEP) - San Francisco, CA (Hybrid) Interface Engineering Inc. At Interface Engineering, we believe your career should be as dynamic and rewarding as the projects you support. As a 100% employee-owned firm, we're proud to offer our Collaboration from Home policy-giving you the flexibility of a hybrid schedule (2 days in-office per week minimum) while staying connected to a team th