Greeley and Hansen, A TYLin Company
At the core and center of every thriving community is wise management of water infrastructure, which is vital to public health and essential to its welfare and growth. We collaborate with our client partners to elevate communities and create better urban environments that improve public health, safety, and welfare. Our passionate and dedicated professionals provide personal, customized service to deliver the integrated, full suite of world class consulting, engineering, and construction management capabilities in infrastructure to serve and propel our clients and communities forward.
Greeley and Hansen was recently acquired by TYLin, expanding its water and wastewater capabilities across the Americas.
Join us at WEFTEC 2023
WEFTEC is the world's most comprehensive gathering of water quality professionals and thought leaders, featuring the sector's leading conference program and a variety of valuable networking opportunities.
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![elevating]()
September 30 - October 4
Our thought leaders will be sharing their insights throughout the conference. Plan to attend one or all of the following sessions:
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![w11 mbr]()
W11 Design and Implementation of Membrane Bioreactors in Water Recycling
Val Frenkel, PhD, PE, D.WRE (Workshop Chair)
Sunday, October 1
8:30 am - 5:00 pm
Room S405 - Level 4 -
![hands in a circle]()
Learning Exchange: People of Color and Its Allies
Walt Walker, PE, ENV SP (Facilitator)
Monday, October 2
1:30 - 3:00 pm
Room N229 – Level 2 -
![environmental hands holding earth]()
Mobilizing Indiana’s First Regional CAP with a Climate-forward Community
Maithilee Das Lappin, PE, ENV SP (Speaker)
Monday, October 2
2:00 - 2:30 pm
Booth 4431 - South Hall A -
![ozonation]()
Ozonation: Water Reuse on a New Level
Val Frenkel, PhD, PE, D.WRE (Asst. Moderator)
Monday, October 2
3:30 - 5:00 pm
Room S402a - Level 4 -
![water droplet]()
Industrial Water: From Linear to Circular Economy
Val Frenkel, PhD, PE, D.WRE (Speaker)
Saritha Sathyanarayanan, PhD, PE (Speaker)Tuesday, October 3
9:00 - 9:30 am
Booth 7739 - North Hall B -
![lead service line]()
Utilizing Data for Lead Service Line Inventory
Marianne Bain (Speaker)
Tuesday, October 3
11:00 - 11:30 am
Booth 4431 - South Hall A -
![membrane filtration]()
Industrial and Oilfield Wastewater: Application of Membrane Filtration and Zero Liquid Discharge (ZLD)
Val Frenkel, PhD, PE, D.WRE (Asst. Moderator)
Tuesday, October 3
3:30 - 4:30 pm
Room S502 - Level 5 -
![protester]()
Intentional Integration of Social Equity into Climate Planning
Walt Walker, PE, ENV SP (Speaker)
Maithilee Das Lappin, PE, ENV SP (Speaker)Wednesday, October 4
8:30 - 10:00 am
Room S402a - Level 4 -
![bogata]()
Anaerobic Digesters Success Stories From Start to Finish
Fernando Sarmiento, PE, PMP, BCEE (Speaker)
Val Frenkel, PhD, PE, D.WRE (Co-Author)
Alejandro Montes (Co-Author)Wednesday, October 4
10:30 - 11:00 am
Booth 7739 - North Hall B -
![raindrops]()
Water Reuse: Plan It Properly
Val Frenkel, PhD, PE, D.WRE (Facilitator)
Wednesday, October 4
10:30 - 11:30 am
Room S401a - Level 4
Water Insights
To join our thought leaders for the monthly Water Webinar Series, please register with Deborah Veal to receive updates on upcoming webinars.
Join our team
Greeley and Hansen, A TYLin Company, offers challenging opportunities for engineering, architecture and other business professionals who have an interest in working together with a team of talented individuals and our client partners to create better urban environments. Our more than 100-year history of success has been fueled by the talent and dedication of our team members who are genuinely passionate about solving the most complex water, wastewater, stormwater and related infrastructure challenges to elevate communities through making them more inclusive and resilient.
We recognize that our ongoing success is driven by our dedicated and highly valued staff. In turn, we strive to provide challenging and rewarding work, attractive benefits, and an exceptional workplace environment where people can collaborate, connect, and maximize personal and professional career growth. We are committed to creating a workplace that allows our dedicated professionals to reach their full potential in an atmosphere that is inclusive, supportive, and encourages creativity.
With nearly 25 years of expertise in the water industry, Mike is a visionary leader committed to client service and developing innovative solutions that address the water, wastewater, stormwater, and solid waste challenges of the communities we serve.
