William H. Hover, P.E.

Bill, a Senior Principal, is currently serving as GZA's Director of Risk Management.

A resident of East Walpole, MA, Bill is a licensed professional engineer in CT, SC, VT, ILL and NY.  His areas of specialization are dam engineering, foundation engineering, civil engineering and braced excavations. 

He received a Bachelor of Science degree in Civil Engineering from Northeastern University and a Master of Science in Engineering from the University of Connecticut and has over 25 published papers in the proceedings of various professional societies.

Kim E. Anderson, Ph.D., CHMM

Dr. Anderson has been employed by GZA for over 16 of his 43 years of consulting, industry and governmental employment.  He has previously served as the Regional Operations Officer of the Great Lakes Region for over a decade while also serving as the Director of Toxicology.  He previously served on the Board of Directors.

Ernest Hanna, P.E.

Ernie Hanna, a Principal, has been with GZA for almost 30 years and is currently working out of GZA's Philadelphia office.  His areas of specialization are geotechnical engineering, the use of geotextiles and trenchless technologies. He earned his Bachelor of Science in Biology/Geology at the University of Rochester (Rochester, NY) and his Master of Science degree in Civil and Environmental Engineering from the University of Wisconsin - Madison.  He is a professional engineer licensed in NJ, NY and PA.

John P. Hartley

John previously served as the Regional Operating Officer for GZA’s New England Region, was a member of our Executive Team and has served two consecutive 3-year terms on GZA’s Board of Directors.  His career at GZA began in 1985 and he now holds the positon of Senior Principal.

Kenneth R. Johnston

Ken, a Principal, currently serves as GZA’s Chief Administrative Officer and serves on the Executive Committee.  Prior to his current role, he served as GZA’s Director of Risk Management, responsible for risk management, contracts, and real estate and, before that, Vice President of Operations.  An 18-year employee of the firm, he is responsible for all administrative tasks facing GZA including all of our real estate interests, purchasing, and overseeing the marketing department.  He works very closely with the CEO on many administrative and operational issues as they arise.

Jeffrey D. Rowell, P.E.

Jeff Rowell has been with GZA for over 23 years and he is an Associate Principal in GZA’s Bedford, New Hampshire office.  He also leads the Institutional Client Focus Group.

His areas of specialization include property condition assessments, asbestos, lead and mold management, site investigations, and remedial design and construction support services. 

He received his Bachelor of Science in Civil Engineering and a Master’s degree in Geotechnical/Environmental Engineering from the University of Massachusetts – Lowell.

Robert J. Palermo, P.E.

Mr. Palermo has been with GZA for over 36 years, during which time he has been involved in some of the largest and most complex projects ever completed by GZA across the country.  As GZA’s client sector lead on Infrastructure projects and the technical practice lead for underground projects, he brings to bear his 40 years of engineering experience to conventional Design-Bid Build, Design-Build and Public Private Partnership projects. 

Anders B. Bjarngard, P.E.

Anders Bjarngard started with GZA in 1984 after completing his Bachelor of Science in Civil Engineering from the University of Massachusetts at Amherst.  In 1987, he took leave to complete his Master of Science in Geotechnical Engineering from Tufts University and rejoined GZA in 1989.  Since that time he has worked in several of GZA’s civil engineering disciplines but has focused primarily on geotechnical engineering, dam engineering and most recently waterfront engineering.

David M. Winslow, Ph.D., P.G.

Dr. Winslow has been with GZA since 2004 and is a Principal and Senior Vice President.  He presently manages the Northern New Jersey district office and provides senior management of environmental investigation and remediation projects.  He also serves as the co-lead for the Environmental Core Services Group within GZA. 


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