SEARCH GET IN TOUCH MENU Company Profile Day & Zimmermann is a century-old, family-owned company specializing in construction & engineering, operations & maintenance, staffing, security and defense for leading corporations and governments around the world. Our vision is to accelerate the next generation of innovation. Chairman & CEO: Harold L. Yoh III Annual Revenue: $2.4 Billion Global Workforce: 41,000 Headquarters: 1500 Spring Garden Street, Philadelphia, PA 19130 Media Contact: Matt Rivera Our customer promise: We do what we say.® Global Workforce 41,000 Founded in 1901 $2.4 Billion Annual Revenue 150+ Worldwide Locations Footprint at 60% of the U.S. nuclear fleet Ranked in Top 100 Defense Companies #1 Ranked Operations & Maintenance Contractor for 10 consecutive years (ENR) Ranked #165 on the Forbes America's Largest Private Companies List Yoh Named to HRO Today's RPO Baker's Dozen list Our People are Our Future In a constantly changing world it’s not businesses, governments and institutions that will build the future. It’s the people behind them. For more than a century Day & Zimmermann has hired, placed and trained the people that helped bring big ideas to life. Our People The best way to learn about life at Day & Zimmermann is to hear from the people who are living it. Meet the people behind our success. LEARN MORE ABOUT LIFE AT D&Z “Day & Zimmermann really gave me the opportunity and encouragement to learn and grow in my career.” AMY WILLIAMS, DIGITAL MARKETING MANAGER © 2021 Day & Zimmermann. All rights reserved. Privacy Policy

SEARCH GET IN TOUCH MENU Leadership John McCormick President, D&Z Maintenance and Construction John McCormick is President of Day & Zimmermann’s Maintenance and Construction Group, a leading provider of total plant lifecycle solutions for the power and industrial markets. Prior to his current position, Mr. McCormick served as president of Day & Zimmermann NPS®, and earlier, as vice president of fossil operations for this division. Mr. McCormick’s career spans more than 35 years and includes executive positions and plant management roles. He most recently served as Senior Vice President of River Management, Safety, Training and Environmental at Tennessee Valley Authority (TVA). Previously, he was the Senior Vice President of Fossil Power Group Operations at TVA. Prior to joining TVA, he spent 25 years working at Exelon Power where he was the Director of Operations and held general manager positions at multiple generating stations. Mr. McCormick holds a B.S. in Mechanical Engineering from Widener University and an Associate Degree in Power Plant Technology from the Williamson College of Trades. He has served on the board of several non-profit and professional organizations. He is former President of the Board of Directors for the National Hydropower Association and is a board member for the Greater Chattanooga United Way. Thought Leadership READ MORE 5.17.2017 Refuse to Lose: Lessons on Winning from the Chicago Cubs If you are a baseball fan like I am, you may be watching the defending world champion Chicago Cubs ... Read Blog Post © 2021 Day & Zimmermann. All rights reserved. Privacy Policy