One of the leading US electrical contractors, Mass. Electric Construction Co. (MEC) has worked on projects for the commercial and industrial (Boeing rocket manufacturing facility), power (Northeast Utilities underground transmission project), life sciences (Merck research center), and transportation industries (Amtrak). Services include design, construction, consulting, budgeting, procurement, testing and start-up, and maintenance. It also offers fire alarm, security system, and telecommunications cabling installation. The company has offices in about a dozen states across the US and in Puerto Rico. Established in 1928, MEC is a wholly-owned subsidiary of Peter Kiewit Sons'.