Colleen K. O'Brien: Lawyer with Semmes, Bowen & Semmes A Professional Corporation

Colleen K. O'Brien


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Experience & Credentials

Practice Areas

  • Business Litigation
  • Eminent Domain & Condemnation Proceedings
  • Life & Health Insurance & ERISA Claims
  • Litigation
  • Maritime
  • Products Liability
  • Toxic Torts & Environmental
  • Transportation
University University of Delaware, B.A. in English, cum laude, 2003
Law SchoolUniversity of Baltimore School of Law, J.D., magna cum laude, 2011 Heuisler Honor Society
Admitted2011, Maryland; 2013, U.S. Court of Appeals for the Fourth Circuit; 2012, U.S. District Court for the District of Maryland

Affiliations, Associations & Special Achievements

•Maryland State Bar Association
•Maryland Defense Council (MDC)
•DRI (Defense Research Institute)

•Women in the Law Committee

•Faculty Coordinator and Speaker Liaison (2013 Seminar)
•Life, Health, Disability and ERISA Committee

•Paper: Beneficiary Designations-Show Me the Money!!: Presented at the Life, Health, Disability & ERISA Claims Seminar in Chicago, IL (April 25, 2012)
•Senior Editor, The University of Baltimore Law Review
•Regional Champion (Washington, D.C. Region), ABA's National Appellate Advocacy Competition (2010)
•President, Moot Court Board (2010-2011)
•Law Scholar, Constitutional Law (2009)
•Research Assistant, Constitutional Law (2009)



Colleen K. O'Brien is an associate in the Firm's Litigation Department. Her practice generally focuses on civil litigation in the areas of insurance defense, products liability, negligence based torts, toxic torts, business litigation, and life, health and ERISA claims. Prior to joining Semmes, Bowen & Semmes as an associate, Colleen interned for the Honorable George L. Russell III at Baltimore City Circuit Court. She was also a summer associate and law clerk with the Firm.

Affiliations, Associations & Special Achievements

• Maryland State Bar Association

• Maryland Defense Council (MDC)

• DRI (Defense Research Institute)
Women in the Law Committee
- Faculty Coordinator and Speaker Liaison (2013 Seminar)
Life, Health, Disability and ERISA Committee
- Paper: "Beneficiary Designations-Show Me the Money!!": Presented at the Life, Health, Disability & ERISA Claims Seminar in Chicago, IL (April 25, 2012)

• Senior Editor, The University of Baltimore Law Review

• Regional Champion (Washington, D.C. Region), ABA's National Appellate Advocacy Competition (2010)

• President, Moot Court Board (2010-2011)

• Law Scholar, Constitutional Law (2009)

• Research Assistant, Constitutional Law (200


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Rooker-Feldman Doctrine Requires Remand of Part of Plaintiff’s Class Action Complaint, but Remaining Counts Will Remain in Federal Court
Colleen K. O'Brien, July 14, 2015
Murray v. Midland Funding, LLC, Civ. No. JKB-15-0532 (June 23, 2015), was removed from State to Federal court under the Class Action Fairness Act (“CAFA”), codified at 28 U.S.C. § 1332(d) and § 1453. The Plaintiff filed a Motion to Remand, which was granted in part and denied...

Following Griffin, Maryland High Court Expands on Techniques to Authenticate Social Media Evidence
Colleen K. O'Brien, May 29, 2015
In a trilogy of cases, Albert Sublet IV v. State, Tavares D. Harris v. State, and Carlos Alberto Monge-Martinez v. State (Maryland Court of Appeals, April 23, 2015), Maryland’s highest court addressed the authentication of social media evidence and confirmed that the current rules of evidence...

Defendant Land Owner’s Property Did Not Have Any “Hidden Engine of Destruction,” But Factual Dispute Over Plaintiff’s Status as Licensee or Trespasser Leads to Reversal of Trial Court Grant of Summary Judgment to Defendant
Colleen K. O'Brien, May 1, 2015
In Toomer v. William C. Smith & Co., Inc., 13-CV-1210 (District of Columbia Court of Appeals, Mar. 26, 2015), Plaintiff Toomer filed a negligence suit for injuries sustained while climbing a fence owned and maintained by the Defendant property manager. The trial court granted summary judgment...

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Office Information

Colleen K. O'Brien

25 S. Charles Street, Suite 1400
BaltimoreMD 21201


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