MACTEC Engineering and Consulting (MACTEC) has promoted Allen J. Ikalainen, Jeff R. Keaton, Michael D. Sufnarski, and Nelson Walter to vice president.

Snapshot bios:

Allen J. Ikalainen, P.E.

Ikalainen is based in the firm’s Wakefield, MA office and spearheads operations for three of MACTEC’s New England offices. He has more than 30 years experience in both the private sector and the U.S. Army Corps of Engineers. His background includes program/project management and engineering assignments related to remediation of contaminated sediments, waste site cleanup, and dredge/fill issues. Ikalainen has a M.S. in environmental engineering from Northeastern University and a B.S. in civil engineering from Worcester Polytechnic Institute.

Jeff R. Keaton, Ph.D.

Keaton is based in MACTEC’s Los Angeles office and joined the firm in 2005. For almost 40 years, he has provided consulting engineering geology services for a variety of clients and projects on five continents. Keaton specializes in quantifying hazardous natural processes for siting and design. Keaton is licensed as a geologist and engineer in several western states, including Alaska. He earned his Ph.D. in geology from Texas A&M University, his M.S. in engineering (soil mechanics) from UCLA, and his B.S. in geological engineering from the University of Arizona.

Michael D. Sufnarski, P.E.

Sufnarski joined MACTEC in 2003 and has served as operations manager and business unit leader of the engineered construction group. He was promoted to Charlotte office manager in April 2008. Sufnarski has more than 17 years experience in both the public and private sectors. He served for over a decade as a commissioned officer in the U.S. Army Corps of Engineers, leading disaster-recovery and rebuilding efforts in the wake of hurricanes Katrina, Rita, and Wilma. Recently, Sufnarski managed three nuclear safety-related projects involving geotechnical, geophysical, environmental, and laboratory testing services. Sufnarski is a registered Professional Engineer in both North Carolina and Texas, and is LEED™ accredited. He holds a B.S. in civil engineering from the United States Military Academy at West Point and a M.S.E. in environmental and water resources engineering from the University of Texas at Austin.

Nelson Walter, P.E., LEP, LSP

Based in Portland, ME and with MACTEC since 1986, Walter previously served as senior principal project manager. He is an environmental and site specialist who has been able to bring regulatory closure to several of the nation’s most complex remediation projects. Walter’s technical background includes expertise in chemical and radiological contamination. He has managed multimillion-dollar projects from site investigation through engineering study to joint MEC-MDC design/build and cleanup. Walter holds a B.S. in chemical engineering from Rensselaer Polytechnic Institute. He is a frequent contributor at events related to chemical and radiological programs and trends.

MACTEC (, based in Alpharetta, GA, is a consulting, engineering, and construction firm focused on five strategic business lines: Industrial/Commercial, Federal, Municipal, Energy, and Transportation. With annual revenues of more than $490 million, MACTEC’s 3,000-plus employees work from more than 80 offices nationwide.