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Acentech, founded in 1948, is a multidisciplinary acoustical consulting firm with offices in Cambridge, Mass., Trevose, Pa. and Thousand Oaks, Calif. The company s consultants have expertise in all areas of acoustics, offering services to engineers, architects and designers. It specializes in architectural acoustics, audiovisual and sound system design, noise and vibration control, environmental and industrial acoustics, information technology infrastructure, product design and diagnostics and product noise and vibration control. The firm also designs masking systems, produces contract drawings and specifications suitable for bid by qualified sound system contractors, review and approves bid, shop drawing submittals and checkout installed systems.

With more than 93 years of growth, HNTB Corporation has become one of the most prominent engineering, architecture and planning firms in the United States. The employee-owned company, with more than 3,400 employees and 62 offices nationwide, serves clients in the transportation, architecture and federal markets with technical excellence and a commitment to performance providing work, on time, on budget and to the client's satisfaction. HNTB is a multidisciplinary firm known for its work in transportation, bridges, aviation, architecture, urban design and planning, environmental engineering, water and construction services. Founded in 1914, HNTB has designed movable bridges, the first modern turnpike and a significant portion of the U.S. interstate system. HNTB has a location in Boston.