Tomas Carlsson to boost slumping results at $6.1B constructor; industry loses bridge innovator Cliff Freyermuth, architect Michael Quinn and PR strategist Bruce Ross.
Structural engineer John V. “Jack” Christiansen, a leader in the design of thin-shell concrete structures, died on Aug. 16 on Bainbridge Island, Wash. He would have turned 90 on Sept. 28.