Walter Kiechel Jr., 91, a deputy assistant attorney general with the Department of Justice who became the environmental counsel for the International Paper company, died Aug. 28 at the Fairfax retirement home in Fort Belvoir. He had pneumonia.

The death was confirmed by his son Walter Kiechel III.

Mr. Kiechel worked at the Justice Department from 1953 to 1976, becoming deputy assistant attorney general of the lands and natural resources division. His work affected environmental regulations including land and water use.

From 1976 to 1986, he worked for International Paper in Alabama and New York. He returned to the Washington area in 1997.

Walter Kiechel Jr. was a native of Johnson, Neb., and a 1941 cum laude graduate of the University of Nebraska, where he was elected to the Phi Beta Kappa honor society.

He was a 1949 graduate of Yale Law School, where he was an editor on the law review. He received master’s and doctorate degrees in law from George Washington University in the early 1950s.

He was an Army Air Forces veteran of World War II. From 1949 to 1953, he served in the Air Force and was assigned to the office of the Judge Advocate General at the Pentagon. He later retired as a colonel in the Air Force Reserve.

Besides his son, of Hoboken, N.J., survivors include his wife of 68 years, Mary Hurst Kiechel of Fort Belvoir; two other children, M. Victoria Kiechel and Conrad D. Kiechel, both of Washington; and six grandchildren.

Adam Bernstein