Corporate Status and Contact Information R.O.I. Syngineering is a California corporation with its principal office located at: 2955 E. Hillcrest Drive, Suite 122 Thousand Oaks, CA 91362 (Please call ahead if you'd like to stop by!) Our main telephone voice number is 805-370-1530 Our main fax number is 805-370-1533 Our departmental e-mail addresses are: Customer Service (for questions about purchased products) - custserv@roisyn.com Sales (for more information about our products and services) - sales@roisyn.com Accounting (regarding accounts receivable or payable) - accounting@roisyn.com     Return to Top of Page Return to Home Page