Mark Hoffman 
Sales Manager - Midwest Division
Phone: (605) 330-6586
Fax: (605) 334-3656
Mobile: (605) 595-5218
Sales Region: SD, ND & NE
Industry Experience: 11 years
Education: BS in Civil Engineering from South Dakota State University

Kevin Jellema
Special Product Sales - Midwest Division
Phone: (605) 330-6585
Fax: (605) 334-3656
Mobile: (605) 359-7845
Sales Region: Midwest Region - Special Products
Industry Experience: 20 years
Education: Numerous certifications, training and experience relating to aggregates used in construction, architectural and decorative applications.

Monte Kerzman

Quality Control Manager / Sales - Midwest Division

Phone: (605) 330-6583

Fax: (605) 334-3656

Mobile: (605) 310-4564

Sales Region: IA, MN, MO, KS

Industry Experience: 12 years

Education: Numerous certifications, training, and experience relating to aggregates used in the construction industry and BS in Special Education from Northern State University

Tim Cheever
Sales Manager - Mountain Division
Phone: (303) 286-2242
Fax: (303) 289-1348
Mobile: (303) 941-5095
Sales Region: Front Range - Mountain Division
Industry Experience: 18 years
Education: BS Business Administration from University of South Dakota

Matthew Noteboom, P.E.

Sales Director - Mountain Division

Phone: (303) 286-2245

Fax: (303) 289-1348

Mobile: (303) 941-9620

Sales Region: Front Range - Mountain Division

Industry Experience: 8 years

Education: BS Civil Engineering from South Dakota State University

                  MS Civil Engineering from Colorado State University

Brian Phelps 
General Manager - Jasper Stone
Phone: (605) 330-6587
Fax: (605) 334-3656
Mobile: (605) 595-3422
Industry Experience: 2+ years
Education: 24+ years of business, marketing and project management experience