Hal Yoh is chair and chief executive officer of Day & Zimmermann (dayzim.com), a leader in construction & engineering, staffing and defense solutions for leading corporations and government agencies around the world. He is the third generation of the Yoh family to lead Day & Zimmermann—a family-owned business and former recipient of the U.S. National Family Business of the Year award.

As chairman and chief executive officer since 1999, Hal has helped shape the strategic growth that the company has achieved over the last few decades. He began his career with Westinghouse Electric Corporation as a design engineer and project manager. In 1986, Hal rejoined Day & Zimmermann and held a range of progressive leadership roles including business area manager for the engineering and construction division and president of an affiliate company. In 1993, he was named senior vice president of Day & Zimmermann International, Inc. and in 1994, Hal served as president of the process and industrial division, overseeing the design and construction of plants for customers.

Hal is active in many industry and professional associations. He currently serves as a board member of the National Defense Industrial Association (NDIA) of which he was also past Chair. He is a member of the steering committee for the Defense Industry Initiative on Business Ethics & Conduct, the Business Roundtable, and previously served on the Board of Directors for Teleflex (NYSE:TFX) and as past Chair of the Construction Industry Institute (CII). In 2013, Hal was inducted into the National Academy of Construction.

As a strong proponent of civic and community service, Hal was recently appointed Chair, Philadelphia Airport Advisory Board, and currently serves as a Trustee of the Franklin Institute, and an executive committee member and past chair of the Greater Philadelphia Chamber of Commerce. He also has served as a past board member of WHYY, as well as on numerous boards and committees for Duke University.

Hal is a graduate of Duke University with a Bachelor of Science degree in Mechanical Engineering and Material Sciences, and he holds a Master of Business Administration from The Wharton School of Business at The University of Pennsylvania.