AttorneyMark D. O'Leary● 19 total views
MO

Mark D. O'Leary

O'Leary Law Office·Sioux Falls, SD·38 years licensed

Mark D. O'Leary is a lawyer in Sioux Falls, SD who works for O'Leary Law Office. Practice areas include Aviation, Construction, Insurance. Court admissions include Eighth Circuit Court of Appeals, Federal. Licensed in Texas since 1988. Graduated from William Mitchell College of Law in 1986.

Claim profileContact attorney
Law school
Class of 1986
Bar admission
1988
State Bar of TX · No. 15252400
Office
3500 S Phillips Ave Ste 118
Sioux Falls, SD 57105
Disciplinary
None on record
Clean since admission
MO

Mark D. O'Leary

O'Leary Law Office
Sioux Falls, SD·38 years licensed
Claim profileContact attorney

Mark D. O'Leary is a lawyer in Sioux Falls, SD who works for O'Leary Law Office. Practice areas include Aviation, Construction, Insurance. Court admissions include Eighth Circuit Court of Appeals, Federal. Licensed in Texas since 1988. Graduated from William Mitchell College of Law in 1986.

Law school
Bar admission
1988
State Bar of TX · No. 15252400
Office
3500 S Phillips Ave Ste 118
Sioux Falls, SD 57105
Disciplinary
None on record
Clean since admission
Case data

Case data

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Practice & jurisdiction
Practice areas
  • Aviation
  • Construction
  • Insurance
  • Litigation: Commercial
  • Litigation: Personal Injury
  • Workers' Compensation
Courts admitted
  • Eighth Circuit Court of Appeals
  • Federal
  • Federal Court
  • Minnesota District Court
  • South Dakota District Court
  • South Dakota State Courts
  • Supreme Court
  • Texas Eastern District Court
  • Texas Southern District/Bankruptcy Court
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Last refreshed Jun 2026