Marine Corps Community Services | 19,974 followers on LinkedIn. #itmatterswhereyouwork | Investing in Marines for Duty, Home & Self MCCS exists to serve Marines and their families through our Mission, Vision, and Values that revolve around the Marine Corps ethos of Honor, Courage, and Commitment. Spread across 20+ military Installations and in deployed environments, our goal is to move with Marines throughout their career and into retirement. Our key mission is to enable Marines to adapt, thrive, and stay mission-ready with purpose-driven programs and solutions.