40 Under 40
January 01, 2007
Appeared in Building Design & Construction
David P. Callan, 31
VP and director of sustainable design and high-performance building technology
Syska Hennessy Group, Chicago
PE, CEM, LEED AP
MS CE, Illinois Institute of Technology
BS AE, Drexel University
Youngest principal at the 650-person firm.
Responsible for design and analysis of high-performance mechanical and electrical building systems.
Relocated to Chicago in 2006 to open the firm's “Center of Excellence,” which focuses on high-performance building technology.
Responsible for projects totaling $1.1 billion in construction value during his decade with the firm.
Recently helped land a major $700 million sustainable healthcare project.
Wrote the GSA's Facility Standards PBS P100 mechanical engineering chapter, 2005 edition.
GSA Design Excellence national peer reviewer.
OFF THE CLOCK
Favorite book: The Fountainhead, by Ayn Rand.
Used to perform in a folk group with his parents and twin brother. Currently plays guitar in several Irish music groups.
SECRET LIFE : Member of the Polar Bear Club, the famous bathers who take a frigid dip every New Year's Day.