Vapor Power International. The company makes boilers powered by water tube steam generators with multiple coils that can easily be switched from a gas source to an oil fuel source. The company's products, which also include steam generators and thermal fluid heaters, are typically used in industrial, commercial, marine, and military settings. The firm has served customers such as Bethlehem Corporation, Heidtman Steel Products, and Penn State University. Pittsburgh-based investment firm TAG Equity acquired Vapor Power International in 2009.

SGPA Planning and Architecture (SGPA) offers design, engineering, and planning services for retail shopping and mixed-use centers, senior housing facilities, municipal projects, and such specialty projects as laboratory improvements. The designing company serves clients throughout California through its offices in San Diego and San Francisco. SGPA was established in 1970.

Pribuss Engineering is an air-conditioning, heating, plumbing, and fire sprinkler system contractor for both residential and commercial clients needing to build new systems or remodel, alter, or improve existing ones. The mechanical construction firm handles a large part of its work in-house, only subbing out about 5%. Stanford University engineering graduate Rudy Pribuss started the company in 1968.

PCL Construction Enterprises is the contractor to contact for commercial and civil construction concerns. The company, along with primary subsidiaries (PCL Construction Services, PCL Civil Constructors, PCL Construction Resources, PCL Industrial Services, Teton Industrial Construction, and Nordic PCL Construction) is the US arm of employee-owned PCL, one of the largest general contracting groups in Canada. With projects completed in nearly every state in the US, the company is active in the commercial, institutional, multi-family residential, heavy industrial, and civil construction sectors. PCL first entered the US construction market in 1975.

Greenman-Pedersen, Inc. (GPI) offers engineering and design work for building, infrastructure, power, transportation, and telecommunications projects throughout the eastern US. Its technical capabilities include civil, structural, mechanical, and electrical engineering, as well as surveying, fire protection, building design, land planning, and environmental permitting. The firm and its group of five subsidiaries has worked for government agencies, institutions, industrial firms, and corporations. The company was founded in 1966 by A. Beecher Greenman and Herbert M. Pedersen and has more than 20 offices in 10 states.

Graycor translates blueprints into buildings. The company builds industrial, commercial, health care, and educational facilities in the US, Canada and Mexico. Through its four subsidiaries Graycor offers construction management, maintenance, and design/build services on projects ranging from industrial plant additions to office towers and shopping malls. It provides such trade services as carpentry and concrete and steel work. It also offers blasting, refractory relining, and other maintenance services for power utilities and automotive, food, metals, and waste management companies. Chairman and CEO Melvin Gray and his family own Graycor. Clients have included ArcelorMittal, Motorola, Toyota, and Lafarge.

Engelberth Construction has spent more than thirty years building its business, but it doesn't take nearly as long in the business of building. Specializing in commercial construction the company offers construction management, design/build, general contracting, and additional services for educational, commericial, multi-family residential, and industrial clients. Engelberth Construction works primarily in the New England region (Vermont and New Hampshire) of the US. Otto Engelberth founded Engelberth Construction as a small two-person, home-based construction business in 1972.

Panattoni Construction, Inc. (PCI) is in the business of building businesses. The design/build general contractor specializes in commercial and industrial construction projects, which include manufacturing and distribution facilities, master-planned business parks, and office and retail buildings. The company provides construction management services for such clients as Clorox, Amazon.com, PetSmart, and Whirlpool.The company's project portfolio ranges from smaller 2,500 sq. ft offices to large warehouses spanning more than one million sq. ft. PCI operates from 20 offices in Arizona, California, Colorado, Florida, Georgia, Illinois, Indiana, Missouri, Nevada, New Jersey, Oregon, Tennessee, Texas, and Washington.

ABCO was founded in 1949 by Jules Gottleib; his son-in-law, Michael Senter, runs the company as CEO. ABCO Refrigeration Supply keeps the northeast chilled. Through about 15 locations in Connecticut, Delaware, Massachusetts, New Jersey, New York, and Pennsylvania, ABCO Refrigeration Supply Corp. distributes air-conditioning and refrigeration equipment, parts, and supplies. ABCO offers more than 250 brands of heating, ventilation, air conditioning, and refrigeration products including DuPont, Maytag, Mitsubishi Electric, and Honeywell. ABCO provides online ordering and tracking for its contractor customers. ABCO Refrigeration Supply Corp. also sells to home owners. About half of its proceeds come from customers in the New York metropolitan area.

Athena Engineering specializes in the installation and design of heating, cooling, ventilation, lighting, building automation, and other systems services for the commercial, food processing, health, and telecommunications industries. Athena also offers general construction, energy management, and environmental systems services. The company mostly works for both public and private entities in Southern California. In addition to being privately owned, Athena Engineering is one of the top women/minority-owned companies in the region. Athena Engineering was founded in 1984.

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