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About me

I earned my Bachelor of Arts degree from the University of Delaware, where I majored in Criminal Justice and participated in the Honors Program. I later attended the University of Baltimore School of Law where my concentration was litigation and advocacy. I studied under Professor Byron Warnken, who was my instructor for Criminal Law, Constitutional Criminal Procedure I and II.

Graduating cum laude and winning an award for academic excellence, I earned my JD while ranking in the top 20% of my class. After participating in the University’s Clinical Program, I became licensed to practice law, serving as a public defender in Baltimore City. While working for the Office of the Public Defender, I also worked in the private sector for Towson attorney Richard Karceski, handling criminal matters. I was admitted to the Maryland Bar in December of 2007.

Following law school, I served as a law clerk to the Honorable Joseph F. Murphy, Jr. When I began my clerkship, Judge Murphy was the Chief Judge of the Maryland Court of Special Appeals. During the course of my clerkship, Judge Murphy was appointed to Maryland's highest Court, the Maryland Court of Appeals. While working on both courts, I was responsible for conducting legal research and drafting appellate opinions, some of which have been published and now serve as Maryland law.

Before entering private practice, I spent over two years working as an Assistant State’s Attorney for Howard County. I became a skilled trial lawyer by handling a variety of criminal and traffic cases for the State of Maryland. I have successfully handled countless DUIs, driving while suspended, assaults, drug possession, theft charges, domestic violence and many other cases involving possible incarceration. In November of 2008, I successfully completed the Trial Advocacy Program sponsored by the Maryland State’s Attorneys Association and now apply those skills to defend individuals charged.


Practice areas


  1. Criminal Defense: 50%
    2 years
  2. DUI & DWI: 50%
    2 years



Retainer (sometimes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

12 total 

Are you an attorney? Endorse this lawyer

  • Monica Marie Guilarte

    I endorse this lawyer. Ms. Kirby is aggressive, professional, and knowledgable. Clients that use her services are in good hands without a doubt.


    Monica Guilarte Debt collection Attorney
    Relationship: Fellow lawyer in community

  • David Zwanetz

    I endorse this lawyer no doubt. Colleen is a compassionate and zealous advocate for her clients- both human and canine. I tried cases against Collen when she was an Assistant State's Attorney, have seen her try cases now as private defense, and have worked alongside her in her capacity as an advocate against breed specific dog legislation. She is a consummate professional and will go to the ends of the earth for her clients.


    David Zwanetz Criminal defense Attorney
    Relationship: Fellow lawyer in community

Contact info

Colleen Kirby Attorney at Law

6011 University Blvd
Suite 100
Ellicott City, MD, 21043


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Top 40 under 40National Trial Lawyers Association2014
Top 100 Trial LawyersNational Trial Lawyers Association2013
Top 40 under 40National Trial Lawyers Association2013
Top 100 Trial LawyersNational Trial Lawyers2013
Top 100 Trial LawyersNational Trial Lawyers2013
Mt. Royal Scholarship AwardUniversity of Baltimore School of Law2006
Mt. Royal Scholarship AwardUniversity of Baltimore School of Law2006
Work experience
TitleCompany nameDuration
OwnerLaw Office of Colleen M. Kirby, Esq., Ltd.2014 - Present
Associate AttorneyPrice Benowitz, LLP2011 - 2013
Assistant State's AttorneyHoward County State's Attorney's Office2008 - 2010
Law Clerk, Maryland Court of AppealsHon. Joseph F. Murphy, Jr.2007 - 2008
Rule 16 AttorneyOffice Of The Public Defender Maryland2006 - 2007
law clerkLaw Office of Richard Karceski2005 - 2007
Association namePosition nameDuration
National Trial Lawyers AssociationTop 100 Trial Lawyers2014 - Present
National Trial Lawyers AssociationTop 40 Under 402013 - Present
Maryland Criminal Defense Attorneys' AssociationMember2011 - Present
Maryland State Bar AssociationMemberN/A
Howard County Bar AssociationMemberN/A
School nameMajorDegreeGraduated
University of Baltimore School of LawLawJD - Juris Doctor2007
University of DelawareCriminal JusticeBA - Bachelor of Arts2004