The MIT Plasma Science and Fusion Center is partnering with Commonwealth Fusion Systems to design and build SPARC, a device whose goal is to demonstrate net fusion plasma energy gain Q > 2 in a compact (R~1.8 m) D-T tokamak. The toroidal field coils will use REBCO high-temperature superconductors and R&D progress towards achieving B=12 tesla will be described. SPARC’s detailed design and mission are discussed, including the addition of an advanced long-leg divertor. The SPARC mission is fully aligned with a compact fusion pilot plant ARC, and additional fusion technology research efforts to support ARC will be described. While funded by the private-sector, SPARC provides diverse opportunities for collaborations with the US and international fusion community.