Terry Barr

Terry Barr, PE, CFM, is a Regional Manager for HR Green’s Water Resources Practice in Texas. Terry is a professional engineer and certified floodplain manager with over 20 years of engineering experience in drainage analysis and design with a significant focus on regional stormwater planning. He has led several large-scale watershed planning efforts in the […]

Karam Qaddo

Karam Qaddo, PE, is an Area Manager for HR Green’s Transportation Business Unit. Karam has over 15 years of engineering experience in the municipal infrastructure industry. He has extensive design production experience in roadway, utilities, and drainage projects. He has a proven track record of successfully delivering urban renewal projects within tight deadlines while maintaining […]

Matthew Zeve

Matthew Zeve, PE, CFM, is a Business Development Manager at HR Green. He leads growth and expansion throughout the South Central U.S. with offices in Texas. As a professional engineer and certified floodplain manager with over 20 years of experience in drainage engineering and planning. He has worked on drainage feasibility studies, roadway drainage analyses, development impact […]

Derek St. John

Derek St. John, PE, CFM, is a Practice Leader for HR Green’s Water Resources Group in Texas. Derek is a professional engineer with more than 20 years of engineering experience in the infrastructure industry. His background is well balanced between technical excellence in the fields of flood control and drainage, as well as client and […]

David Greaney

David Greaney, PE, CFM, is a Project Manager for HR Green’s Transportation Business Unit in Texas. David has 9 years of experience in the municipal and TxDOT infrastructure industry performing both roadway and drainage design. He balances drainage analysis and design experience in the public sector with roadway design experience to develop high functioning transportation […]

Clayton McCormack

Clayton McCormack, PE, is a Senior Project Manager in the Water and Wastewater Practice for ISS, An HR Green Company. Clayton has extensive experience in the design of wastewater treatment facilities and systems, specializing in MBR, BNR, and biosolids processes. He has over 25 years of experience in designing and constructing a full range of […]

Devyn Brown

Devyn Brown is a Land Development Project Manager for ISS, An HR Green Company in Sarasota, Florida. Devyn has over 20 years of experience designing and constructing government infrastructure projects. She has supported the civil and site design, permitting, construction management, and regulatory compliance of numerous water, wastewater, and stormwater quality projects. She is proficient […]

Mark Mueller

Mark Mueller is a Lead Associate Engineer in Land Development for ISS, An HR Green Company in Sarasota, Florida. Mark has worked on various infrastructure projects throughout Sarasota County for the past 35 years. Mark’s responsibilities include project management, technical design expertise, funding assistance, management, and overall project coordination. In addition, he has a successful […]

Bill Huffman

Bill Huffman is a Construction Manager in the Water and Wastewater practice for ISS, An HR Green Company. Bill has more than 45 years of experience in designing and constructing civil engineering projects, with a particular focus on developing horizontal infrastructure such as roads, utilities, pipelines, landfills, and earthwork. He has extensive experience in earthwork […]

Brian Stahl

Brian Stahl is the Florida Regional Director for ISS, An HR Green Company. Brian is a professional engineer with over 35 years of experience in managing engineering planning, funding assistance, design, permitting, and construction services for wastewater treatment projects. His work spans municipal utilities, industrial clients, and federal government installations, and involves continuous direct contact […]