TULSA, Okla.--(BUSINESS WIRE)--Gateway Mortgage Group, a privately held mortgage company offering originations, servicing and correspondent lending, has announced the addition of Barbara Niedt as a new regional sales manager of Correspondent Lending to serve the Colorado, Utah and Wyoming markets. “Throughout my career, I have gained a solid understanding of the many aspects of mortgage lending and its secondary market,” Niedt said. “Gateway is expanding its presence in several key markets and