Chief Katherine Perez began her professional career in Hartford, Connecticut as a patrol officer in 1983, advancing through the department, serving as Commander of the Investigative Services Bureau and the Support Services Bureau before retiring in April of 2004. She became the Chief of Police in District Heights, Maryland upon her retirement from the Hartford Police Department. In 2006 she was appointed to the position of Independent Juvenile Justice Monitor for the State of Maryland with the State Attorney General's Office.

After a nationwide search, Perez was chosen to start the first Bowie Police Department on September 11, 2006. Under her leadership the Bowie Police Department grew to 52 sworn members and 6 civilians personnel. In late 2010, Katherine Perez accepted a position as Assistant Chief over the Law Enforcement Unit of the Federal Reserve Police Board of Governors of the Federal Reserve System.

Assistant Chief Perez holds Bachelor's and Master's degrees from Trinity College (Hartford, Connecticut).

Assistant Chief Perez is married to Major Allan G. Grines (US Army Ret.) and has five children.