A licensed nurse practitioner, Ruth Kostur serves as a senior oncology account specialist at Teva Pharmaceuticals, a leading therapeutic developer and producer of specialty and generic medicines. She also heads RGK, Inc., which she founded in Gunbarrel Park, Colorado, in 2018. In her leadership of RGK, Ruth Kostur focuses on the creation of foods that taste good and can be easily eaten, while still delivering essential nutrition.

Over the past few years, she has been in various roles in the pharmaceutical industry, working on the launch and commercialization of cancer treatments with companies such as Exelixis, Inc., and Onyx Pharmaceuticals. Previously, she provided education and clinical coordination in the field of oncology at Genentech BioOncology. Her past experience ranges from serving as a nurse practitioner at Mountain Blue Cancer Care Center to overseeing clinical trials at Quintiles Transnational Corporation.

Ruth Kostur belongs to professional organizations such as the American Society of Clinical Oncology and the American Society of Hematology. In her leisure time, she enjoys cooking, listening to music, reading, and telemark skiing. She has also earned several awards for participation in triathlons and cycling events.