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      Robert J. Weir, PE   President    
   |      As President of Entech, Bob guides our leadership team as we pursue our mission to help our clients make more informed decisions in the careful planning and management of their facilities, infrastructure, and resources to create a better-built environment. Bob’s corporate strategic focus is on operations management and the application of specific technologies for communication and project delivery. Formerly, as Entech’s Executive Vice President, Bob oversaw our civil and environmental resources group and provided a broad range of technical and project management services for our clients. In is 20+ years of experience in civil and environmental engineering, he focused primarily on water and wastewater engineering. Bob holds a Bachelor’s degree in Environmental Engineering and an Associate degree in Electrical Engineering from The Pennsylvania State University and is a registered Professional Engineer in Pennsylvania, New York, Ohio, North Carolina and West Virginia.    |   
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          Bryon A. Killian, PE   Executive Vice President Principal | Water/Wastewater    
  |      Bryon is the leader of our Civil, Water, Wastewater, and Environmental Services Group. Focused on the cost-effective and strategic management of water/wastewater infrastructure and environmental compliance, Bryon leads our clients through informed decision-making processes by overseeing the delivery of system evaluations, data analysis, environmental compliance management, and design services. Bryon holds a B.S. in Environmental Engineering from The Pennsylvania State University and is a Certified Wastewater Operator and a Registered Professional Engineer in Pennsylvania, New York, North Carolina, and Washington state.        |   
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      Stuart Heisey, PE   Principal | MEP Planning & Design Services    
  |      As Entech’s Director of the Facilities Business Unit, Stuart leads the firm’s Facilities Markets and its Planning and Design services. Stuart is responsible to champion all of Entech’s services into the Facilities three major market areas (Education, Government, Healthcare), while also leading the deployment of Facilities Planning and Design services into the firms other markets (Industrial, Municipal, Energy). Stuart’s oversight includes leading a multidisciplinary team that supports clients in assessing, planning designing, and constructing their infrastructure and buildings. In this role, he oversees strategy, proposals, personnel, production, and marketing support for all facility-related projects across Entech’s various markets.   Beyond his technical leadership, Stuart is actively involved in Entech’s strategic initiatives, contributing to information management, culture development, and operational excellence.   Stuart is a registered Professional Engineer in Pennsylvania, New Jersey, Maryland and West Virginia , and holds a B.S. in Engineering from Messiah College. He is also a LEED Accredited Professional through the U.S. Green Building Council.    |   
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      Bryan C. Haag, PE   Principal | Energy & Utilities    
  |      As Director of Entech’s Utility, Energy, and FCA Services, Bryan guides our clients through building and utility systems condition assessments, planning, and design projects. He also works with our clients to address energy and carbon reduction planning in conjunction with utility projects or as independent energy initiatives. Bryan graduated from Drexel University with a B.S. in Architectural Engineering, Mechanical Engineering Focus. He is a Registered Professional Engineer in Pennsylvania, Delaware, and Maryland, a LEED AP® certified professional, and a Certified Energy Manager.    |   
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      Tanner A. Sattler, PG   Principal | Oil & Gas    
  |      Leading Entech’s Oil & Natural Gas Services Team, Tanner provides expertise to our upstream, midstream, and downstream clients to support their strategic decision-making for natural gas infrastructure development through the delivery of environmental engineering services, permitting, hydrogeological specifications, routing studies, and pipeline design services. Tanner is a licensed professional geologist in Pennsylvania, holding an MS in Geology from West Virginia University and a BS in Earth Science from the Pennsylvania State University.    |   
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      Christopher M. Hannum, PE   Principal | Water/Wastewater    
  |      As Entech’s Civil Engineering Manager, Chris oversees the Water and Wastewater Engineering Department and manages personnel, design production and marketing support. With 25 plus years of engineering, water and wastewater experience, Chris focuses on project management, quality assurance and staff training, and helps clients make more informed decisions as they invest in their infrastructure systems.   Chris holds a B.S. in Mechanical Engineering from the Virginia Military Institute and a M.S. in Water Resources and Environmental Engineering from Villanova University. He is a registered professional engineer in the state of Pennsylvania, and a veteran of the United States Army.    |   
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      Matthew Quinn    Principal | Water/Wastewater    
  |      Matt helps oversee the design, permitting and construction of various water and wastewater projects. Matt has spent his entire career at Entech. Starting in 2009, as an intern while he was earning his Bachelor of Science in Civil Engineering from Penn State University, he has continually proven himself as an excellent leader, earning the trust of clients and co-workers alike. Matt brings energy and passion to each project, committed to delivering quality projects and results.      |   
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