Contact Visit us Our office is located at: 12002 Charles Dr. Grass Valley, CA 95945 Contact us Send us a message Please enable JavaScript in your browser to complete this form.Name *Email *Comment or Message *Submit Call us Office hours: Monday - Friday, 8:00am - 5:00pm Ellie Williams/Office Assistant(530)272-2708 ext. 2 David Matson/President(530)272-2708 ext. 3 Peter Van Matre/Project Manager(530)272-2708 ext. 4 Karena Laubinger/Accounting Manager(530272-2708 ext. 5