Stamford, Conn.-based Tronox Limited (NYSE:TROX) has a new CFO.

Tronox announced this week that it has hired former Rio Tinto business development officer Katherine C. Harper to become its new Chief Financial Officer. In a statement, company CEO Tom Casey expressed confidence that "her deep knowledge  in both sectors [the global mining and chemical industries], as well as her work in international financial markets will help drive Tronox's strategic vision of growth and profitability."

Tronox also announced the hire of a second Rio Tinto alumnus, Jean-Francois Turgeon, to become its executive vice president in charge of the titanium dioxide company's Mineral Sands and Pigment & Electrolytic Divisions.

Harper will join the company on Sept. 16, taking over responsibility for leading the company's global finance group, including treasury, financial planning & accounting, controller, risk management, compliance & audit, and investor relations functions. Turgeon will join later, on Jan. 1.

Tronox is a global leader in the production and marketing of titanium-bearing mineral sands and titanium dioxide pigment.