Executive Team

Our senior management team members average more than 22 years of industry experience and have provided innovative and proven engineering, construction
and operations on projects throughout the United States and abroad.

Johan Perslow, P.E., Chairman and CEO

With more than 40 years experience the engineering and construction business, Mr. Perslow has been the principal designer, consultant and construction manager for more than 700 water and wastewater projects. He has also been the lead designer on other kinds of engineering projects, including his design for the World Trade Center Memorial Complex. Mr. Perslow founded PERC Water in 1998 to provide clients a guaranteed Total Solution™ for their water, wastewater treatment and water recycling infrastructure. He is based in our Costa Mesa office.


Nathan Owen, President

Mr. Owen joined PERC Water in 2006 and has a wide range of experience in the construction industry from project conception through project closeout. Since joining in 2006 he has been involved in all facets of the business. Mr. Owen has a degree in Technology Management and Building Construction from Utah Valley University. He is based in our Costa Mesa office.


Robert J. Nespeca, Vice President Infrastructure Concessions
Mr. Nespeca has more than 30 years experience in the operation and maintenance of water and wastewater industry facilities and has been with PERC Water since 2001. Mr. Nespeca manages and oversees the operating services division. He has a BA from St. John’s University and Wastewater Treatment Plant Operations degree from California State University’s School of Engineering. Bob is based in our Costa Mesa office.


Steven D. Owen, Vice President Infrastructure Development

Mr. Owen has worked in various senior management positions in the environmental, engineering and construction industry for the past 15 years and has been with PERC Water since 1997. He has been directly involved with the conceptual design phase of more than 50 water recycling facilities, and a key role on the design, build, operate team for 19 water recycling facilities in the southwest US. He has a degree in Business Administration & Management degree from the University of Phoenix. Mr. Owen is based in our Phoenix office.


Karen T. Sayles, Director of Finance

Ms. Sayles joined PERC Water in 2006 having worked for more than 13 years at a multi-office environmental consulting firm that serviced over 200 clients. She has extensive experience with revenue recognition and process documentation, and implementation within the project accounting realm. Ms. Sayles has a BS in Business Administration-Marketing from Cal State University of Long Beach and is based in our Costa Mesa office.


Larry Johnson, Director of Technical Services

Mr. Johnson joined PERC Water in 2002 and has more than 30 years experience in the wastewater industry. He assists in the construction completion of our facilities including testing equipment, QA/QC, control system functionality, and performance compliance testing. He has a Grade IV Wastewater Treatment Operator Certification in Arizona, California, and New Mexico. He is based in the Phoenix office.

Our Philosophy
Our History