NOTK is privileged to represent a wide diversity of outstanding clients, from Fortune 100 companies to small family businesses, to governmental offices and agencies, to non-profit organizations, and individuals.

A representative sample of the firm's clients includes:

Aeromet • Aircraft Fueling Systems • Air Liquide America • American Digital Systems • Arrow Magnolia International LP • Baldwin Steel Company • Blue Cross Blue Shield of Oklahoma • Carter Excavating • Catholic Charities • Cintas Corporation • Community Care of Oklahoma • ConocoPhillips • Cyntergy • Dillon International • DP Manufacturing • Flintco • Ford Investment Enterprises • Ford Motor Company • Kaiser Francis Oil Company • Mazzio's • McDonald’s Restaurants • MidFirst Bank • Mother Nature's, Inc. • NORDAM Group • Norris, a Dover Resources Company • Oklahoma National Bank • Orkin Exterminating Co. • Rib Crib • Rollins, Inc. • Rogers County Rural Water District No. 3 • Sequoyah Memorial Hospital • Southern Star, Incorporated • Sonic • Tulsa National Bank • Triad Eye Clinic • Tulsa County Court Clerk's Office • Tulsa County District Attorney's Office • Tulsa Winch • Tyson Foods, Inc. • United Ford of Tulsa • U. S. Cellular • Willbros USA