Hayward Baker Inc., the Odenton, Md.-based geotechnical contractor, has named Dan Cadenhead as senior vice president and head of its western-region business operations. He remains president of Anderson Drilling, a Lakeside, Calif., sister company acquired in 2006 by their parent firm, U.K.-based Keller Group plc. Cadenhead has been in that role since 1998. A past president of the International Association of Foundation Drilling, Cadenhead currently is an executive committee liaison with the California Dept. of Transportation.
Leonard Sequeira has joined Mark Thomas & Co., a San Jose, Calif., surveying and structural engineering firm, as principal and regional division manager for its Southern California operations. The move follows the firm's July 19 acquisition of Orange County, Calif.-based MTS Engineers, of which he had been president. The combined firm has 200 professional staffers.has been elevated to president and project manager of Washington Closure Hanford (WCH), overseeing its $2.3-billion River Corridor Closure project at the U.S. Energy Dept.'s Hanford nuclear-waste cleanup site in Washington state. Johnson has been closure director at WCH—a limited-liability firm owned by URS Corp., Bechtel National and CH2M Hill—since joining in 2010. Previously, she was infrastructure executive director at the Sellafield nuclear site in the U.K., responsible for critical nuclear safety-related infrastructure and support services, commercial fuel transport and security, among other things. Johnson also managed more than 1,900 employees and an annual budget of about $500 million. She replaces who has retired after a 45-year career in the nuclear sector.