Colin Proksel focuses his practice on complex litigation across a wide set of industries. He has a track record of success representing clients in both state and federal court, arbitration, mediation, and administrative proceedings.

Colin graduated with distinction from the University of Iowa College of Law. Before joining Osborn Maledon, he served as a law clerk to the late Honorable Arthur L. Alarcón on the U.S. Court of Appeals for the Ninth Circuit and by designation in the Sixth and Eleventh Circuits. He was also a litigator at major firms in Chicago, New York, and California.

Colin is a Director on the Maricopa County Bar Association Board of Directors and a member of the City of Phoenix’s License Appeals Board.

Representative Matters


  • Felarca v. Birgeneau, 891 F.3d 809 (9th Cir. 2018) – Obtained reversal of denial of summary judgment and remand with instruction to enter summary judgment in favor of major university in high-profile constitutional rights and tort action on.
  • Daisley v. Blizzard Music Limited (US) et al., 2:17-cv-01500 (C.D. Cal.) – Represented Robert Daisley, former bandmate of Ozzy Osbourne, in fraud and accounting action against music publisher


  • Arrowood Indemnity Co. v. Trustmark Ins. Co., No. 03-cv-1000, 938 F. Supp. 2d 267 (D. Conn. 2013), affirmed 560 Fed. App’x 75 (2d Cir. 2014) – Prevailed in two-week hearing, in which court rejected claims of a breach of fiduciary duty and bad faith and motion for contempt for alleged failure to comply with previously confirmed arbitration award.
  • Whalen v. Catholic Mutual Relief Society, DDV-2012-9756 (Mont. 1st Jud. Dist. Ct., Lewis and Clark County.) – Defended large provider of property and casualty coverage for Catholic Church entities in tort and coverage actions arising out of alleged clergy abuse.
  • Clarendon National Ins. Co. & Clarendon America Ins. Co. v. Trustmark Ins. Co., No. 09-cv-9896 (S.D.N.Y. Jan. 13, 2012) – Obtained a summary judgment against reinsurer in a matter relating to purported offsets.
  • Trustmark Ins. Co. v. Clarendon National Ins. Co., No. 09 C 6169 (N.D. Ill. Feb. 2010) – Represented reinsurer in action to disqualify arbitrator and for preliminary injunction.
  • Trustmark Ins. Co. v. John Hancock Life Ins. Co., Case No. 09-cv-3959 (N.D. Ill. Jan. 2010) – Represented plaintiff reinsurer in fraud suit regarding concealment of evidence material to adverse award in prior arbitration and motion to enjoin related arbitration.
  • Trustmark Ins. Co. v. Clarendon National Ins. Co., 09-C-1673, 2009 WL 4043110 (N.D. Ill. Nov. 20, 2009) – Defeated reinsurer’s attempt to reduce its obligations under an arbitration award for debts allegedly due to it from prior, unrelated matters.