Harold L. Yoh, III
Chairman and CEO

Hal Yoh is Chairman 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. Headquartered in Philadelphia, PA and ranked as one of the largest private companies in America by Forbes, the company operates from more than 150 worldwide locations with a workforce of over 50,000. Day & Zimmermann is a former recipient of the U.S. National Family Business of the Year award. Since becoming Chairman and CEO in 1999, Mr. Yoh has continued the company’s dedication to its values-based culture and promise to its customers – We do what we say.

Mr. Yoh is active in many industry and professional associations including roles as past Chairman and current board member of the National Defense Industrial Association (NDIA), past Chair of the Construction Industry Institute (CII), and member of the steering committee for the Defense Industry Initiative on Business Ethics & Conduct. He is a member of the Business Roundtable and previously served on the Board of Directors for Teleflex (NYSE:TFX). In 2013, Mr. Yoh was inducted into the National Academy of Construction, and he was awarded ‘Master Entrepreneur’ for Greater Philadelphia as part of Ernst & Young’s Entrepreneur of the Year program. 

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

Mr. Yoh 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.