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Day & Zimmermann is a century-old, family-owned company whose 21,000 employees specialize in construction & engineering, staffing and defense solutions for leading corporations and governments around the world. Operating from more than 150 worldwide locations with 2.2 Billion USD in revenue, Day & Zimmermann is currently ranked as one of the largest private companies in the U.S. by Forbes. Founded in 1901 and headquartered in Philadelphia, PA, our first work was to develop "Betterment Reports" that helped modernize American factories. Today, we are still in the business of betterment -- maintaining the nation's power infrastructure, protecting American freedoms and driving technological advancements around the world. We do what we say.
Quanta Services (NYSE: PWR) is a full service engineering, procurement and construction (EPC) service provider based in Houston, Texas. Quanta was built on the vision of becoming the single-source solution to an array of complex market needs. This vision has allowed Quanta to acquire the best companies in the industry and become the leading integrated solutions provider serving the electric power and oil and gas infrastructure markets.
Zachry Holdings, Inc. has more than 85 years of experience in delivering on the engineering, construction and maintenance needs of the worlds most sophisticated customers in the power, refining and process sectors.
At Draper Aden Associates, Lasting Positive Impact® is more than a slogan, it represents and embodies our core culture and belief that each day gives us an opportunity to leave our mark on the world. With nearly 50 years of experience providing civil, environmental, geotechnical, solid waste, and structural engineering, surveying, and subsurface utility engineering, site planning and engineering, and construction inspection services throughout the Mid-Atlantic region, we more than just a set of plans; we are a way to achieve.