Janeen L. Birckhead is a U.S. military officer serving as the adjutant general of Maryland since April 2023. She is a major general of the Maryland Army National Guard. She was previously a senior advisor in the Bureau of Trust Funds Administration and the assistant adjutant general from June 2018 to April 2023.

The Adjutant General of Maryland is the head military official of the Maryland National Guard, the Maryland Defense Force, and any other military or paramilitary units that may be maintained by the State of Maryland. The adjutant general is responsible for the military department's budget and maintains all State-owned armories in Maryland.