TPF Contact:  

Cornerstone Systems
Karen Donohue
420 Exchange, Suite 150
Irvine, CA 92602
Tel: 877-451-2005
Fax: 972-868-9121
Email:kdonohue@csihome.com

Founded in 1990, Cornerstone Systems has established itself as a leader in large systems implementations, application development, network design, enterprise security and support services. Cornerstone holds the highest designations with its vendors, including having served as a longtime IBM Premier Business Partner. Our staff includes professionals from a wide variety of disciplines, industries and major corporations. Our technical personnel hold key certifications, and our commitment to continuing education ensures that we are at the forefront of new technologies. Our support staff remains on call on a 24 x 7 basis to respond timely and competently to our customer’s questions and issues.

Broad Capabilities
Cornerstone Systems comprises a number of interrelated functional disciplines. Our headquarters office in Irvine, California houses our Reseller Division, which sells IBM mainframes and other Large Systems, storage and related services. Our other major office, located in Valencia, California, houses our Services Division. This division offers a spectrum of capabilities, including Large System Services, Security, Integrated Systems, Application Development and Web Enablement.