Marriott International, the Bethesda, Md.-based hotel chain with 2008 revenues of $12.9 billion, promoted Carl T. Berquist to CFO and executive vice president. Berquist, 57, had been executive vice president of financial information and enterprise risk management. After joining the company in 2002, he led an initiative to expand effectiveness and transparency in financial analysis and reporting. Berquist succeeds Arne M. Sorenson, 50, Marriott's CFO since 1998, who was appointed president and COO.

Norfolk Southern, the Norfolk, Va.-based freight railroad with 2008 revenues of $10.7 billion, promoted Marta R. Stewart to treasurer and vice president. She succeeds William J. Romig, 64, who has retired. Stewart, 51, joined Norfolk Southern in 1983 as assistant manager of accounting systems. She served as manager of financial reporting and director of corporate accounting before being appointed controller and vice president in 2003. The company named C.H. "Jake" Allison, Jr., 45, to succeed Stewart as controller and vice president.

Armstrong World Industries, the Lancaster, Pa.-based producer of flooring and ceiling products with 2008 revenues of $3.4 billion, appointed William C. Rodruan interim CFO. He succeeds Nicolas Grasberger, 45, who becomes CEO and executive vice president of Armstrong Building Products. Rodruan, 54, is a 33-year veteran of the company. He has held management roles throughout Armstrong World Industries and most recently served as vice president of finance for the Americas division of Armstrong Flooring Products.