Art Henschen has joined Refuse Management Inc., Orlando, Fla., as executive vice president of operations.

Mike Nigro has been named president and chief operating officer of Dynamac Corp., Rockville, Md.

Clayton Group Services Inc., Novi, Mich., has named Philip J. Kaszar president and CEO, Alton Hobbs environmental services manager for its Atlanta office, Ronald H. Hill senior project manager for its Denver office and Daya Bettadapura senior project manager/senior engineer for its Los Angeles office.

Dvirka and Bartilucci, Woodbury, N.Y., has named Thomas McGovern project manager/engineer, Stefanos Eapen construction management director, Gabriella Circosta engineer and Sean Pepling senior geologist.

Jim Braselman has joined Tempe, Ariz.-based Essential Information Systems (EIS) as director of enterprise sales. Jerry Duke also has been named office manager for the EIS division of ESS' Houston office.

Minneapolis-based Aeromix Systems Inc. has named Guido Michelutti regional sales manager.

Earl Burrell, president and CEO of Resource Waste Services, Fort Worth, Texas, has been selected to serve the state on its Congressional Business Commission (CBC).

Jim Derouin, Steptoe & Johnson LLP, has been named a member of the Superfund Subcommittee of the Washington, D.C.-based U.S. Environmental Protection Agency's (EPA) National Advisory Council for Environmental Policy and Technology (NACEPT).

Waste consulting firm Reed, Stowe & Yanke LLC, Austin, Texas, has named Scott Pasternak manager and Nelisa Fullerton senior consultant.