Earl M. August, 54, a senior scientist with the National Cancer Institute and SAIC in Frederick, died Nov. 21 at Howard County General Hospital in Columbia.

According to his companion, Doris Lefkowitz, he had cardiovascular disease.

For the past year, Dr. August had worked with SAIC and the National Cancer Institute.

From 1994 until 2011, he was a senior scientist at Boehringer Ingelheim Pharmaceuticals in Ridgefield, Conn., a director at Repligen Corp. in Waltham, Mass., and a research scientist with Phytera Inc. in Worcester, Mass.

He was a scientist in the developmental therapeutics program at the National Cancer Institute in Bethesda from 1990 to 1994.

Earl Michael August was born in Chicago and moved to the Washington area as a child. He graduated from Frederick Douglass High School in the Upper Marlboro area in 1976 and from George Washington University in 1980.

He received a doctorate in biological chemistry from the University of Illinois College of Medicine in Chicago in 1985 and did postdoctoral study at the Yale Medical School’s Department of Pharmacology from 1985 to 1990.

Dr. August, who lived in Frederick, wrote more than 30 articles and chapters in scientific books and was a member of several scientific editorial boards.

His marriages to Elizabeth Scanlon August and Lori Patnude ended in divorce.

Survivors include his companion of one year, Doris Lefkowitz of Ellicott City; and two children from his first marriage, Micaela August and Cameron August, both of Southington, Conn.

— Bart Barnes