Mark D. O'Leary

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Education & Credentials

University Attended:
University of Minnesota, B.A., 1972
Law School Attended:
William Mitchell College of Law, J.D., 1986
Year of First Admission:
1986
Admission:
1986, Minnesota; 1987, U.S. District Court, Southern District of Texas; 1988, Texas; 1994, South Dakota; 1986, U.S. District Court, District of Minnesota; 1994, U.S. District Court, District of South Dakota; U.S. Court of Appeals for the Fifth Circuit; U.S. Court of Appeals for the Eighth Circuit
ISLN:
904707999

Areas of Practice (36)

  • Litigation
  • Business Contracts
  • Employment Contracts
  • Business & Commercial Litigation
  • Employment Law & Counseling
  • Insurance Law
  • Mechanical Products
  • Negligence
  • Non-Compete Covenants
  • Premises Liability
  • Product Liability
  • Professional Liability
  • Sexual Harassment
  • Partnership/Shareholder Disputes
  • Trade Secrets and Unfair Competition
  • Partnership/Shareholder Disputes
  • Nursing Home Liability
  • Personal Injury, Accidents, and Insurance Claims
  • Aircraft Accidents
  • Arson & Fraud
  • Automobile Accidents
  • Bad Faith
  • Complex Torts
  • Construction Defects
  • Defective Products
  • Farm Accidents
  • General Litigation
  • Insurance Claims & Litigation
  • Business Litigation
  • Nursing Home Injuries
  • Sexual Harassment & Discrimination Claims
  • Subrogation & Recovery
  • Truck/Semi-Tractor
  • Work Place Injuries
  • Workers' Compensation
  • Nursing Home Malpractice

Peer Reviews

4.9/5.0 (24 reviews)
Martindale-Hubbell® AV Preeminent Rating Badge
  • Legal Knowledge

    5.0/5.0
  • Analytical Capability

    4.9/5.0
  • Judgment

    4.9/5.0
  • Communication

    4.9/5.0
  • Legal Experience

    5.0/5.0
  • 5.0/5.0 Rated by a Attorney on 11/03/22 in Litigation

    Mark is a quality atty, and certainly meets the criteria to be rated AV.

  • 5.0/5.0 Rated by a Attorney on 11/04/20 in Litigation

    Mark O'Leary is a gentleman, highly ethical and an excellent lawyer.

  • 5.0/5.0 Rated by a Attorney on 11/04/20 in Litigation

  • 5.0/5.0 Rated by a Attorney on 11/04/20 in Litigation

    Mark is the consummate professional and does an excellent job of representing his clients.

  • 5.0/5.0 Rated by a Attorney on 11/04/20 in Litigation

  • 5.0/5.0 Rated by a Partner on 11/04/20 in Litigation

    Incredible lawyer. One of the premier litigators in our state.

  • 5.0/5.0 Rated by a Attorney on 11/04/20 in Litigation

  • 5.0/5.0 Rated by a Of Counsel on 10/28/20 in Litigation

    I have already rated and commented in a survey received a few days ago. Same opinion and same comments. He is one of the best attorneys in our state and region - and with 30 years of experience I think I should know.

  • 5.0/5.0 Rated by a Attorney on 10/28/20 in Business Litigation

    I have worked closely with Mark O'Leary over a period of about a year and a half now. on a long standing construction litigation claim. I am not a close friend - I live in a different city. Over 30 practice years I have seen many attorneys litigate i... Read more

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  • 5.0/5.0 Rated by a Shareholder on 10/27/20 in Litigation

    Mark is a trusted legal advisor and represents his clients with effectiveness and efficiency. He is a zealous advocate for clients while retaining the ability to work with any opposing counsel with ease.

Peer reviews submitted prior to 2008 are not displayed.

Other Legal Directories

Lawyers Client Review
5.0/5.0 (1 review)
 Client Champion

Mark O’Leary is exceptional! Great advisor and consummate professional. Highly knowledgeable and experienced in litigation matters. Dependable and fair. Mr O’Leary is personable and easily relatab...

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Client Reviews Write a Review

Location

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Mark D. O'Leary: Attorney at O'Leary Law Office
  • Sioux Falls, SD
    Trane Sales Office , 3500 South Phillips Avenue, Suite 120
    Sioux Falls, SD 57105