Construction management firm J. Calnan & Assoc. Inc. has completed the corporate headquarters for Biogen IDEC at The Weston Corporate Center in Weston.

J. Calnan & Assoc. completed the 100,000-square-foot corporate headquarters for the biotechnology company in 14 weeks. Highlights include new executive offices with high-end finishes, open office areas and workstations as well as three telepresence and video conference rooms, according to a statement.

The project team included Boston Properties, landlord; Vanderweil Engineers, mechanical, electrical plumbing and fire protection engineering; Nelson, architecture; and Office Environments, audio-visual and furniture.