Major Dave McDowell

Assistant Sheriff

Major Dave McDowell is a law-enforcement professional with more than twenty-three years of experience. The last seventeen of those years he has served with the Calvert County Sheriff’s Office. He began his service with the Sheriff’s Office as a Deputy assigned to the Patrol Bureau in 1996. In 1999 he became a Criminal Investigator. His investigative duties included crimes against persons, property crimes, sex crimes and child abuse. In 2001 he became the first Criminal Intelligence Investigator in the Calvert County Sheriff’s Office. That same year he was promoted to the rank of Corporal. In 2003 he was promoted to the rank of Sergeant and assumed supervision of the Canine Unit, Intelligence Unit and Sex Offender Registry.


In 2005 he became the first 1st Sergeant in the agency’s history and assumed responsibilities of the Assistant Commander of the Patrol Bureau. In 2006 he was promoted to the rank of Lieutenant and became the Patrol Bureau Commander. In 2013 he was promoted to the rank of Captain and assumed the role of Chief Deputy. Later that same year he was promoted to the rank of Major and became the Assistant Sheriff.


Some of his major accomplishments include: Graduate of the Police Training Academy, Metropolitan Police Department, Washington D.C., Calvert County Sheriff’s Deputy of the year 1997, Maryland Sheriff’s Association Deputy of the year 2004, Graduate of the FBI National Academy in 2006, Session 225, attained a Master’s Degree in Management Science from the Johns Hopkins University in 2010, member of the Calvert County Sheriff’s Office Hostage Negotiations Team 1997 through 2013. He has received numerous certificates, awards and commendations throughout his career. He is currently a member of the Maryland Sheriff’s Association Board of Directors. He is a member of the Fraternal Order of Police, Johns Hopkins Alumni Association, and various other community and state organizations. He is an Associate Professor at the College of Southern Maryland, Department of Criminal Justice and the National Labor College, Department of Emergency Management. He is a certified instructor with the Maryland Police and Corrections Training Commission and Federal Law Enforcement Training Center.