Before coming to the Pacific Northwest, Professor Oltman was an instructor at the Indianapolis Law School in the areas of legal writing, advocacy, corporations, property, and criminal law. Later, he taught contracts and legal systems at Victoria University in Wellington, New Zealand. On his return to the U.S., he practiced law with Ashley, Foster, Pepper & Riviera, Seattle. He joined the faculty in 1974.
- Washington Community Property Deskbook (Supp. 1999) (with Thomas R. Andrews & Gary C. Randall).
- Washington Law of Wills and Intestate Succession (1985 & Supp. 1994) (with Mark Reutlinger).
- The Implied Termination of Community Property Agreements upon Permanent Separation, 14 U. Puget Sound L. Rev. 53 (1990).
- Divorced but Not Deceased: The Anomaly of the 'Surviving' Former Spouse, Washington State Bar News, Mar. 1986, at 27 (with Mark Reutlinger).
- The Statutory Community Property Agreement as a Will Substitute on the Death of the Second Spouse, 19 Gonz. L. Rev. 511 (1983/84) (with Mark Reutlinger).