Computer Methods is a software engineering firm located in the heart of Silicon Valley. A division of Physio Systems, Inc., the company was founded in 1986 and provides engineering services developing Windows, iOS, Android and Web applications for medical, scientific and small-business clients. We bring a unique set of skills and experiences to our project developments.

Computer Methods Office
David Lieberman

Dave Lieberman is the owner and CEO of Computer Methods. He graduated from the University of Michigan with Bachelors and Masters degrees in Electrical Engineering. For over 30 years, Mr. Lieberman served on Association Boards and worked closely with private security companies to enforce parking and HOA rules. In 2008, Computer Methods published, a 24/7 “Online Solution for Security Guards”. Mr. Lieberman holds a Visiting Professor appointment from DeVry University and teaches at the Newark Campus in Newark, CA. See Dave’s resume “here”.

Michael Arnold

Lieutenant Mike Arnold joined Computer Methods in 2008 after serving over ten years in the private security industry. As a senior software developer, Mike combines his extensive experience in the security industry with Microsoft .NET programming skills to apply state-of-the-art web technologies for private patrol applications. Mike has expanded his skill set to include iOS and Android application development in addition to PCB design and circuit board prototyping skills. See Mike’s resume “here”.


1660 W.Linne Rd.
Suite H
Tracy, CA. 95377


(510) 824-0252