Colman Headquarters PO Box 216 47092 SD Hwy 34 Colman, SD 57017 Voice: 1-800-234-1960 605/534-3535 Fax: 605/256-1690 Pipestone Service Center PO Box 336 1102 7th St. SE Pipestone, MN 56164 Voice: 507/825-3342 Fax: 507/825-4835 Brandon Service Center PO Box 857 108 N. Heritage Rd. Brandon, SD 57005 Voice: 605/582-2185 Fax: 605/582-3165 Don Marker General Manager Joel Brick Wireless Technical Director Deb Sommers Director of Customer and Employee Relations Edie Larsen Executive Assistant Betty VanDerWerff Director of Finance and Accounting Ted Smith Director of Engineering and Operations Carrie Law Director of Communications and Government Relations Brenda Schelhaas Manager of Customer Services Carol Ackerman Manager of Marketing Justin Moose Manager of Information Technology Dave Ossefoort Manager of Purchasing & Materials Ray DeJong Operations Manager (Minnehaha County) Mark Wiese Operations Manager (Pipestone & Rock County) Robin Savage Operations Manager (Moody, Lake & Brookings County)