Sommeling has more than 35 years of experience in law enforcement. Prior to joining the commission, he served as Undersheriff in Ocean County for 11 years. Previously, he served in the Seaside Heights Police Department from 1955 to 1967, and the Dover Township Police Department from 1967 to 1981. For a time he was assigned to the Ocean County Prosecutor's Office and served as the Deputy Director of the Ocean County Narcotics Bureau.
From 1981 to 1989, Sommeling worked in casino surveillance departments in Atlantic City, culminating as the Director of Surveillance at Tropicana Atlantic City. He also served as chairman of the Dover Township Board of Adjustment and the Dover Township Municipal Utilities Authority and was a member of the Ocean County Utilities Authority and chaired its Administration Committee.
Sommeling holds a bachelor’s degree in criminal justice from The College of New Jersey (Trenton State College) and a master’s degree in administration from Rider University. He also received an associate’s degree from Ocean County College, a certificate in Police Science and Administration from Temple University, and completed post graduate courses at Cornell University and the University of Virginia. He received professional training at the New Jersey State Police Academy, the FBI National Academy, and the National Sheriff's Institute. He served in both the New Jersey National Guard and the United States Marine Corps Reserve.
After leaving the Commission at the end of 2010, Sommeling was reappointed as Undersheriff of Ocean County. He served as Acting Sheriff from December 14, 2012 to January 2014.