Roy Bartholomew Sonora CA

Director of Engineering for On Guard Security Systems Inc.


Roy Bartholomew Sonora CA works at On Guard Security Systems Inc. in Modesto, California. He was born and reared in the San Francisco Bay Area, the youngest of seven siblings of French-speaking Cajun parents.

Roy Bartholomew also owns By Referral Only Electric. After 35 years in the engineering field, he has developed a select and in-demand skill set and good connections with local and national business owners.

In addition to his full-time job and business endeavors, Mr. Roy Bartholomew Sonora CA is well-known in the engineering world for delivering high-quality engineering, design, and consulting services for Biodomes and other engineered ecosystems. He currently resides in Northern California, is married, and has one son.