Devoted Health’s new headquarters has been completed at the Watch Factory in Waltham at 221 Crescent St. Devoted Health is a new health care company serving seniors, launching Medicare Advantage Plans in 2019.

Vantage Builders completed the 20,000-square-foot office space with architects Fusion Design. The offices have an open floor plan and seating, with glass-encased conference rooms and “huddle” rooms for impromptu meetings. Vantage Builders was hired for the project by the building owners, Berkeley Investments Inc.