Daniel H. Oster graduated from the University of North Dakota School of Law in 1991.
After being an associate of Max D. Rosenberg, P.C. from 1991- 1994, Mr. Oster became a sole practitioner.
In 2000, he and Brenda A. Neubauer founded the law firm of Neubauer and Oster. After twelve years, he and Theresa L. Kellington founded Kellington & Oster, P.C.
Mr. Oster is licensed to practice law in North Dakota and the North Dakota Federal District Courts.