Headquarters. Philadelphia

Branch Offices. Day & Zimmermann has 150 offices worldwide.

Roots. Dodge & Day was founded in 1901 in Philadelphia when Charles Day partnered with Kern Dodge. John Zimmermann joined the company in 1908, and the company's name was then changed to Day & Zimmermann.

Areas of Expertise. The firm delivers design/build, EPC, modular construction, contract maintenance, and program management services.

Key Markets. Microelectronics, pharmaceutical, chemical, food and beverage, consumer products, pulp and paper, cogeneration, cryogenics, utility, and light and heavy industrial.