Erin N. Threet, P.E.

Lewisburg, PA Office Manager

Ms. Threet is a Project Manager in HRG’s Water & Wastewater Service Group. She has over 10 years of experience serving a diverse client base throughout central Pennsylvania.  In her role as a Project Manager, Ms. Threet provides water and wastewater facilities planning assistance; design and permitting of collection, conveyance and distribution systems and storage and treatment systems for municipal and private utility projects; and contract administration services during the construction phase of projects. Ms. Threet also manages HRG’s Lewisburg, Pennsylvania office. In this capacity, she is responsible for managing the day-to-day operations of the office and business development initiatives.


Office: 570.524.6744
Cell: 570.713.9482
LinkedIn: Erin N. Threet, P.E.


  • B.S., Civil Engineering, Bucknell University


  • Professional Engineer, PA


  • Bucknell Engineering Alumni Association
  • Central Pennsylvania Water Quality Association
  • Pennsylvania Water Environment Association
  • Pennsylvania American Water Works Association
  • Society of Women Environmental Professionals
  • Water Environment Federation


  • Water and wastewater facilities planning
  • Water distribution system planning, design, and permitting
  • Water storage and treatment systems planning, design, and permitting
  • Water distribution system extensions and replacements
  • Water system modeling
  • Wastewater collection and conveyance systems planning, design, and permitting
  • Studies, reports, and investigations of water, wastewater, and environmental issues
  • Municipal/authority retainer engineer services