Dennis A. Wichern - Oberheiden, P.C.
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Dennis A. Wichern

Former Special Agent-in-Charge (DEA)

DEA, Chicago Field Office
DEA Compliance

Phone: (888) 680-1745

Dennis A. Wichern is the former Special Agent-in-Charge of the Chicago, Illinois regional office of the United States Drug Enforcement Administration (DEA).

DEA Service. Until recently, Special Agent Wichern headed the DEA’s Chicago office supervising close to 600 agents, special agents, diversion investigators, attorneys, and staff employees of the DEA. In that capacity, Mr. Wichern was the top federal DEA agent for one of the central regional offices covering full responsibility for all civil and criminal operations and investigations in the states of Illinois, Indiana, Wisconsin, Missouri, and North Dakota. Previously, Mr. Wichern served as Assistant to the Deputy Administrator (the second-in-command of the United States Drug Enforcement Administration worldwide operations) at the DEA Headquarters in Arlington, Virginia; Assistant Special Agent-in-Charge in Indiana; Section Chief in Virginia; Group Supervisor in Missouri; and, earlier in his career, as a DEA Special Agent in Missouri.

Healthcare & Pharmacy Consulting. Mr. Wichern’s primary consulting focus are (1) establishing effective compliance programs for healthcare business owners, physicians, and pharmacies in the areas of drug diversion, risk mitigation, opioid prescriptions, overdose prevention, and drug and chemical investigations as well as (2) assisting those medical providers and pharmacies under audit by commercial insurance carriers, the Office of Inspector General (OIG), the FBI, the DEA, the Medicaid Fraud Control Unit (MFCU), the Attorney General’s Office, or the Department of Justice for alleged fraud or violations of the Controlled Substances Act (“opioid indictments”). Mr. Wichern offers clients 30 years of federal law enforcement experience and, with it, a clear understanding of and working relationships with all major federal agencies, the U.S. Sentencing Commission, Assistant United States Attorneys, U.S. Attorneys, and other Department of Justice officials.

Education. Mr. Wichern is a Certified Public Accountant (CPA) and he holds a Master of Arts in Business and Finance from Webster University, Webster Groves, Missouri as well as a B.S. from Southeast Missouri State University at Cape Girardeau, Missouri.

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