Our Team


The firm’s Principal, William Bethurum IV PE is recognized as an expert in the design of large scale facilities. Mr. Bethurum has more than 28 years experience  throughout a wide variety of industries including oil & gas, industrial process and manufacturing, water/wastewater, advanced technology, governmental, commercial, mission critical facilities and data centers.

Returning to Southern California after college Mr. Bethurum began his career designing oil and gas facilities while studying finance at Cal State Long Beach where he was a member of Beta Gamma Sigma academic honor society with 4.0 GPA. During his first year out of college he was lead engineer on a $30M water processing project for a major Los Angeles refinery. After returning to Arizona in the mid ’90s he joined with former employer Jacobs Engineering to design local microelectronic facilities. He started Industrial Power Engineering Corp. (later renamed General Power Engineering) in 1996. A subsequent partnership with Day and Zimmermann Int’l. led to a lead engineering position at Intel Fab 12 and design of large scale microelectronic facilities including a $60M microelectronic facility for Motorola in Austin, TX. In 2006, partnering with local process engineer, RT Engineers, he engineered a $90M, 8MGD wastewater treatment facility expansion for the City of Surprise. In 2012 he completed a $50M mission critical facility located in Arizona and currently under construction. Major clients include or have included,

Motorola Phoenix, AZ/Austin, TX, Arco Los Angeles Refinery, TRW, Mobil Torrance Refinery, Southern California Gas Co., Maricopa County, Shutterfly, Southern California Edison, Medtronic, SAS, City of Surprise, City of Phoenix, ON Semiconductor, State of Arizona, Valero, WL Gore, Iridium, Nextel, Praxair, ASM, YMCA, Tokyo Electron, Hilton Worldwide, and many regional architects, private corporations, and investors.

By way of industry credentials, Mr. Bethurum is a graduate of Arizona State University and is a registered electrical engineer in the states of Arizona, California, Nevada, and New Mexico, and member of National Society of Professional Engineers, International Association of Electrical Inspectors (Associate), and Illuminating Engineering Society.

Personal interests include architectural design, construction, running and strength training, and golf. Married to wife Katrina with a family of four children, Jacob, Sydney, Isabella, and Gianna. Pets include (3) large dogs, (1) cat. Personal accomplishments include a solo descent of KT22 peak in Squaw Valley in near darkness at the age of 10. A former surfer, skater, and bass player. A life long LA Dodgers fan.

img_8852-eastEast Saile – I have close to 24 years experience as a technical designer, 8 of those years being with VoltaUS. I am hard-working, reliable, and determined with a semi-adventurous personality. In my spare time, I enjoy macro & landscape photography, off-roading, and jet-skiing.  I’m also a collector and an avid sports fan.



Jasmine Downing – I am originally from Milwaukee, WI. I take pride in adding some “Midwest flava” to the Valley of the Sun. My professional background consist of 18+ years experience in accounting, finance, and business management for various types of industries. Outside of VoltaUS, I teach & manage aspiring models and actors, while also modeling and acting myself.  Most people consider me a social butterfly because I enjoy the social scenes of good people, nice music, and deep conversations. I believe in doing what you love & live by the motto, “Make your next move your best move.”





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