While athletes and most coaches come and eventually go, and even in some cases Athletic Directors, Mary Matthiessen was the constant in the Rattlers' Athletics Department for almost 3 decades overseeing administrative duties from 1983 to 2009. Amongst many responsibilities, she was accountable for eligibility records, scholarship allocations, and coordinating all team travel arrangements. Mary also volunteered for over 20 years on the Medicine Hat College (MHC) Rattlers Booster Club taking on executive roles of Treasurer and Secretary during that time.
The college recognized Mary's contributions in 1994-95 with an Outstanding MHC Employee Service Award. Mary was also instrumental in Co-Chairing 3 CCAA National Championships hosted by MHC, and contributing to the organization of many other CCAA and ACAC events staged by MHC. Mathiessen was a well-respected contributing member of the ACAC Conference Council as a delegate from MHC.