Contact Information: Main Office: 1345 E Spur Ave Gilbert, AZ 85296 Phone: (480)-275-5077 Fax: (480)-275-5870 Dr. Gary E. Freeman, President freeman@r2d-eng.com Phone: (480)-225-5206 David L. Derrick, Vice President d_derrick@r2d-eng.com Phone: (601)-218-7718