Mannatech, Incorporated announced it has promoted David Johnson, Chief Accounting Officer, to Chief Financial Officer as it continues to build an executive team dedicated to supporting its independent sales Associates. In his new role, Johnson will lead the company's accounting, finance and treasury teams. Johnson joined the company in July 2013 and brings more than 22 years of experience to the company. He is responsible for reporting financial results to shareholders, Associates and management with a focus on improving the financial operations of the enterprise through continuous dedication to tight expense control.

At the same time, the company has also promoted Diane Barton, Assistant Controller, to Controller. Through her promotion, Barton will have an expanded role in SEC reporting, accounting policy development, risk management and international accounting functions. Barton has more than 30 years of accounting experience with public and private companies and joined the company in 2006 as Accounting Systems Liaison.