Legal Services

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Located in Sioux Falls SD, Mark O’Leary Law Office is engaged in the private practice of law throughout South Dakota, Minnesota and the Upper Midwest.

Mr. O’Leary limits his practice to a select number of individuals, business clients and insurers needing specialized civil trial expertise for litigation in State and Federal Courts. He is licensed to practice law in South Dakota, Minnesota, and Texas.

Mark has extensive experience in a wide variety of products liability, subrogation, employment, personal injury, general commercial litigation, insurance bad faith, and workers’ compensation claims.


In the area of litigation, O’Leary Law has extensive work in the follow areas:

  • 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

Personal Injury, Accidents, and Insurance Claims

In the areas of insurance claims, personal injury and accidents, Mr O’Leary is dedicated to the interests of his clients. Representative case work in this area includes:

  • Aircraft Accidents
  • Arson & Fraud
  • Automobile accidents
  • Bad Faith
  • Complex Torts
  • Construction Defects
  • Defective Products
  • Farm Accidents
  • General Litigation
  • Insurance Claims & Litigation
  • Nursing Home Injuries
  • Sexual Harassment & Discrimination Claims
  • Subrogation & Recovery
  • Truck/Semi-Tractor
  • Work Place Injuries
  • Workers’ Compensation

So whatever your legal needs are Mark O’Leary Law Office is here to serve you. Please contact us via phone or email.