Assistant Chief Betsy Davis grew up in Silver Spring, Maryland, and attended Montgomery Blair High School. After graduating from high school, she attended Towson State University in Towson, Maryland, where she received her Bachelor of Science degree.

Betsy joined the Montgomery County Police Department in February of 1985 and started her career as a patrol officer working in the 3rd District. While assigned to the 3rd District she served in patrol, investigations, and with the Special Assignment Team. In 1992, she was promoted to Corporal and assigned to the 2nd District. In 1994, she was promoted to Sergeant and remained at the 2nd District until she became the Sergeant in charge of the Bethesda Investigative Section in December of 1998. She was promoted to Lieutenant in February of 2000, and served as the Deputy Commander of the Rockville District. In June of 2001, she was selected to head the 6th District Station until her promotion to Captain in April of 2002. She was then transferred and assigned as the Commander of the 2nd District where she served for three years. In May of 2005, she was assigned to the Personnel Division where she served until September of 2006, when she became Commander of the 3rd District.

In June, 2007 she had the honor of being selected by Chief J. Thomas Manger to serve as the department's newest Assistant Chief. 

Assistant Chief Davis is a life-long resident of Montgomery County, currently living in Silver Spring.