Donald T. Rocen, 67, a lawyer who specialized in federal tax issues, died Oct. 13 at his home in Alexandria. He had pancreatic cancer, said his son, Jeff Rocen.

Since 2007, Mr. Rocen had worked in the Washington office of Miller & Chevalier, where he specialized in counseling large corporations and other businesses on federal tax issues.

For most of his legal career, Mr. Rocen worked for the Internal Revenue Service. He joined the IRS in Washington in 1971 and served in Denver from 1978 to 1982. He then returned to Washington, where he later became assistant to IRS Commissioner Lawrence B. Gibbs.

From 1989 to 2004, Mr. Rocen worked in the national tax office of Coopers & Lybrand, an accounting firm that became PricewaterhouseCoopers.

Mr. Rocen returned to the IRS in 2004 and was special counsel to the chief counsel and then deputy chief counsel for operations until his retirement in 2007.

He received the Treasury Department’s highest career service award, the Albert Gallatin Award.

Donald Theodore Rocen was born in Berwyn, Ill. He graduated from John Carroll University in University Heights, Ohio, in 1967 and from Northwestern University’s law school in 1970. He received a master’s degree in taxation law from Georgetown University’s law school in 1976.

He was a member of St. Mary Catholic Church in Alexandria. His avocations included crossword puzzles and gardening.

His first marriage, to Jean Hejtmanek, ended in divorce.

Survivors include his wife of six years, Virginia Voght Rocen of Alexandria; two children from his first marriage, Jeff Rocen of Baltimore and Amy Rocen of Los Angeles; four stepchildren, Lillie Tillar and Toby Voght, both of Virginia Beach, Stover Voght of Alexandria and Mary Carolyn Watson of San Antonio; a sister; and three grandchildren.

— Bart Barnes