Boston-based environmental engineering firm GEI Consultants Inc. recently added four senior practice leaders and a marketing manager to its ranks.

Peter Heynen has joined GEI as a senior geotechnical leader in the Atlantic region, located in the Glastonbury, Conn. office. He has more than 35 years of engineering and management experience.  Heynen is a licensed professional engineer in Connecticut, Florida, New Hampshire, New Jersey, Pennsylvania, Rhode Island and Virginia. 

Todd Coffin has joined the firm as a senior practice leader and branch manager for the Portland, Maine office.  He is a licensed professional geologist in the state of New Hampshire and a certified geologist in the state of Maine. He brings with him more than 23 years of environmental consulting experience.

Rick Iger has been named an executive engineer located in GEI’s Bakersfield, Calif. office.  He comes to GEI after 35 years with the Kern County Water Agency.

David Johnson, P.G. has joined the Ontario, Calif. office as a principal hydrologist.  He has more than 22 years of experience in the fields of water resources, environmental and engineering consulting. He is a registered professional geologist in the state of California.

Joseph Barry serves as the New England regional marketing manager and is located at GEI’s corporate headquarters in Woburn. He has been a marketer within the engineering industry in Boston for more than 13 years.