Sheriff Dan T. Mack has been with the Hamlin County Sheriff's Office since 1976. He was a deputy sheriff with the department from 1976 until 1979 before he ran for Sheriff. He was elected into office the fall of 1979 and has held the position to this day. Sheriff Mack is a member of the South Dakota Sheriff's Association and was president during the year of 1986.  Sheriff Mack is also certified in HazMat Printing, does employment fingerprinting, civil fingerprinting, investigate crimes, investigate accidents, does office budget, works on execution of judgment and other law enforcement duties.   During his time off, Sheriff Mack likes to spend time fishing, camping, boating and being with family. 

Sheriff Mack and his wife, Louise, ran the sheriff’s office by themselves for many years.  Now, the Hamlin County Sheriff’s Office has three full-time deputies with the help of two communities in the county, Lake Norden and Castlewood. Louise works as a secretary and dispatcher for the department and keeps police reports, civil papers, and other law enforcement items in order.  Louise has been working with the department since 1980. 

Deputy Jeremy Steffensen has been with the sheriff's office since summer of 2003. He worked at the Estelline Police Department before becoming a full-time deputy sheriff with the Hamlin County Sheriff's Office.  Deputy Steffensen works on civil/criminal papers, traffic enforcement and 24-7 program.  During his off time, Deputy Steffensen likes to fish, hunt and spend time with the family.