Mr. Siegfried has 35 years of architectural experience . He joined Herring & Trowbridge in 1996,. Mr. Siegfried has led numerous projects ranging from master planning to design of office buildings, office warehouses, retail centers and professional and medical projects, as well as multi-unit, assisted living housing.

Most recently, Mr. Siegfried has been responsible for the design of Belvoir Corporate Office Buildings, and has been intimately involved in all phases of the Digital Realty Loudoun North Campus. Prior to this work, he was the Project Designer and Manager for the first of 15 projects in the 350-acre Atwater Office Park; the Diamond Shamrock Headquarters in San Antonio, a 210,000 sq. ft. corporate headquarters; Memorial City Medical Professional Building III, a 12 story, 300,000 sq. ft. medical office center with a seven level garage in Houston, TX; a 250,000 sq. ft. office & manufacturing warehouse for K*TEC Electronics; The Terrace, a 560 unit Retirement Living Community in Houston, TX; Reston Crescent Phase One, a six story, 195,000 sq. ft. office building in Reston, VA; and Westbrook Corporate Center, a three story 200,000 sq. ft. office building.

Mr. Siegfried received his Eidg. Fähigkeitszeugnis als Gelernter Hochbauzeichner (Hochbauzeichner Degree) from the Hochbauzeichner Schule in Zurich. He is a registered Architect in Switzerland.

Mr. Siegfried is also an accomplished competitive cyclist.