Executive Board
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Executive Board

Jennifer Lopez

Past President

In 2013, Jennifer started her journey as a Wastewater Operator for Carson City Water Resource Reclamation Facility. She holds a Bachelor’s degree in Biology from the University of Nevada, Reno and is a licensed Wastewater Treatment Plant Operator Grade IV in the state of Nevada as well as a Professional Operator from the ABC. She has developed math training to assist with certification preparation and has been the treatment plant’s lead expert on process control analysis. She also represents the Professional and Technical Committee for Northern Nevada for the Nevada Water Environment Association.

Charlie Lee, P.E.


Charlie is registered as a Professional Engineer in Nevada and has previously worked for a land development firm, general contractor and state regulatory agency. He currently works at Clark County Water Reclamation District in Development Services. He was first exposed to NWEA while working at the Nevada Division of Environmental Protection and has developed a great respect for the many dedicated professionals he has met there. He comes from an eclectic background and enjoys a great many things from sports to music to movies to tech. He and his lovely wife have a beautiful son, with a daughter on the way.

Krishna Pagilla


Dr. Krishna Pagilla is a Professor and Environmental Engineering Program Director at the University of Nevada, Reno. He is also the Director of Nevada Water Innovation Campus at UNR. Dr. Pagilla’s expertise is in the field of water quality, water resource recovery, water reuse and environmental biotechnology. He researched and published over 200 works on those subjects in leading publications. Among his numerous awards for professional achievements, he received the Thomas R. Camp Applied Research Award (2013) and Fair Distinguished Engineering Educator Award (2013) from the Water Environment Federation (WEF).

Jake Jacobson

Executive Secretary

Jake moved to Nevada in 2008 and became active with the NWEA Executive Board attending meetings and co-established the collection system committee and workshops. Jake also created a local PWO based collections systems supergroup comprised of collection system supervisors and leads from all municipalities in the southern valley. This group would meet once a month and discuss miscellaneous topics from operations practices, exchanging org charts, vital emergency contact information for SSO’s, understanding available mutual resources, and lessons learned.

Keli Callahan


Keli has been a member of NWEA since 2005, and has served as President, YP (South) Chair and Technical and Professional Development Committee Chair. Keli is a 2013 graduate of WEF’s Water Leadership Institute. Keli is a Vice President with Carollo Engineers and manages Carollo’s Nevada operations. Since joining Carollo in 2001, she has been involved in numerous projects including planning, design and construction of water and wastewater infrastructure and treatment facilities. She has a B.S. in Civil Engineering from Fresno State...

Clayton Coon

PWU Representative

Clayton is happily married with one toddler and a brand new baby. While building his family he is also doing whatever he can to build his career in wastewater. Clayton started with City of Henderson in 2008, during that time he have worked in process control, collections, reuse discharge, solids handling, and expanded his experiences for anything else that may come his way. For two years he was the safety officer for the department. Currently he is also the head of the tool committee for the department. Clayton has participated in Operators Challenge for the...

Nikita Lingenfelter

WEF Delegate

Nikita is an enthusiastic member of the NWEA board. She has been working for the Nevada Division of Environmental Protection for almost 10 years. She started working for the Bureau of Air Pollution Control - Carson City Office in 2016. She transfered to the Bureau of Water Pollution Control - Las Vegas Office in 2014. She has a wonderful husband, two beautiful daughters, and a super sweet schnoodle named Oreo. In her free time, she likes to travel, read, and eat chocolate covered strawberries.

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