Patricia Drummey Stiegel, PE
Associate Vice President
Trish specializes in the analysis, design, and construction of wastewater and water treatment facilities. She leads Hazen's Project Management Committee, and has extensive experience taking a project through the study and design phases. Trish has worked on numerous plant expansions and upgrades, as well as new construction. Her experience includes hydraulic analysis, biological nutrient removal processes, disinfection evaluations and design, master planning, pump station design, and wastewater reuse.
- Areas of Expertise
- UV disinfection
- Hydraulic analysis
- Wastewater reuse
- Deep bed filter design
- Professional Activities
- American Water Works Association (AWWA)
- Water Environment Federation (WEF)
- International Ultraviolet Association (IUVA)
- North Carolina Water for People (NCWFP)
- Education
- MS, Environmental Engineering, University of North Carolina at Chapel Hill
- BS, Civil Engineering, University of Notre Dame
- Certification/License
- Professional Engineer (PE)
