Judge Kleinschmidt started his legal career in 1966 as an associate with a large law firm in Phoenix, where he became a partner. In 1971, he became an Assistant Federal Public Defender for the District of Arizona. In 1977, he was appointed to the Maricopa County Superior Court where he served for five years, two as the Presiding Civil Judge.
In 1982, he was appointed to the Arizona Court of Appeals for Division One. Judge Kleinschmidt served as the Chief Judge of Division One from 1994 through 1996, and he remained with the Court of Appeals until 2000.
Since joining Schneider & Onofry as of counsel in 2000, Judge Kleinschmidt has worked on several complex cases and served as a private mediator, arbitrator, special discovery master, and appellate consultant.