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Meet Our Providers Leadership OSI Careers Walk-In Clinic Locations

Curt Kubiak, CEO

Curt has been the guiding force behind OSI’s business direction and development since 2007. During this time, Curt has been instrumental in OSI’s growth to include orthopedic surgery, spine surgery, podiatry, pain management, physical therapy, sports medicine, orthotics, imaging, and skilled nursing. Under Curt’s direction, recent OSI accomplishments include total hip, total knee, and ankle replacements at the OSI surgery center; bundled payments for orthopedic surgeries; the creation of Recovery Inn, a first-of-its-kind recovery facility dedicated to orthopedics; and a multi-year contract for athletic training services for the Appleton Area School District’s three high schools.

Curt holds a BS in Finance/International Business and Spanish from Marquette University and an MBA from the University of Wisconsin—Oshkosh. He is green belt certified in lean management and value stream mapping. His previous experience in the manufacturing and product realization industry brings a unique perspective on efficiency and process improvement to OSI. He is an active member of the community, who sits on the board of the Community First Fox Cities Marathon. He is also a member of the UW—Oshkosh MBA Advisory Board.

Tammy Williams, COO

Tammy became Chief Operating Officer at OSI in 2018. This position leads all internal operations including the Surgery Center, MRI, Concierges, Facilities Management, Recovery Inn, Community Programs, and Partner Relationships. With over 20 years of executive leadership experience, Tammy possesses a wealth of experience and knowledge including 15 years as President & CEO of Best Advantage Credit Union in Brillion and, most recently, her tenure as Chief Culture Officer and Executive Vice President Innovation & Culture at Verve, a Credit Union, in Oshkosh.

Tammy’s unique leadership and management background as well her effectiveness in team building and fostering collaboration will be a catalyst for individual and group excellence at OSI. A graduate of the Leadership Institute, Tammy earned a Bachelor of Science Degree in Business Administration and a Masters of Management Degree from the University of Wisconsin – Green Bay.