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About Me

Marci Gilligan’s practice includes Denver white collar criminal defense, criminal defense and related civil litigation in both State and Federal courts.

Within the practice of white collar defense, Ms. Gilligan has defended clients accused of securities fraud, bank fraud, wire fraud, tax fraud, mortgage fraud and violations of the Clean Water Act.  She has also represented clients before State and Federal grand juries and conducted internal investigations on behalf of corporations under criminal and regulatory investigation.  Most recently, Ms. Gilligan served as trial counsel in some of Colorado 's highest-profile white collar cases including the insider trading trial of the former CEO of Qwest Communications and the successful defense of a Vice President of Qwest Communications on securities fraud counts.

Beyond her white collar practice, Ms. Gilligan represents clients in State and Federal cases in all variety of misdemeanors and felonies including sophisticated drug conspiracies, property crimes, computer crimes, and crimes against persons.  Additionally, Marci Gilligan has briefed and argued direct appeals in criminal cases before the Tenth Circuit Court of Appeals.

Ms. Gilligan's civil experience includes representation of individuals in a wide range of State and Federal litigation involving matters from breach of contract to violations of the Air Carrier Access Act to the defense of complex securities litigation.  Ms. Gilligan also has experience in the representation of claimants in FINRA arbitration.


Practice Areas


  1. Criminal Defense: 50%
  2. White Collar Crime: 30%
  3. Securities & Investment Fraud: 20%

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Contact Info

RIdley McGreevy & Winocur PC

303 16th Street, Suite 200
Denver, CO, 80202



Professional Misconduct

We have not found any instances of professional misconduct for this lawyer.
Avvo Contributions
Legal Answers
Award NameGrantorDate Granted
Rising StarColorado Super Lawyers2012
Rising StarColorado Super Lawyers2011
Rising StarColorado Super Lawyers2010
Trial Advocacy AwardJames P. Mize2000
Work Experience
TitleCompany NameDuration
PartnerRidley, McGreevy & Winocur, P.C.2009 - Present
PartnerKamlet Reichert, LLP2008 - 2009
PartnerRichilano & Gilligan2006 - 2008
AssociationRichilano & Ridley2004 - 2006
AssociateLindquist & Vennum2000 - 2004
Association NamePosition NameDuration
American Bar Association, Criminal Justice Section,Committee on White Collar CrimeRocky Mountain Regional Co-Chair2009 - 2011
Faculty of Federal AdvocatesBoard of Directors2005 - 2007
University of KansasPaul E. Wilson Defender Project1999 - 2000
American Bar AssociationMemberN/A
Colorado Criminal Defense Bar Association (Arapahoe County chapter)MemberN/A
National Association of Criminal Defense LawyersMemberN/A
10th Circuit Criminal Justice Act PanelMemberN/A
Legal Cases
Case NameOutcome
Mail Fraud and Securities FraudAcquitted
Mortgage FraudDeclined Prosecution
Investigation of Computer CrimesDeclined Prosecution
See all Legal Cases 
School NameMajorDegreeGraduated
University of Kansas School of LawLawJD - Juris Doctor2000
University of KansasEnglishBA - Bachelor of Arts1996
Speaking Engagements
Conference NameTitleDate
University of DenverMoney Laundering2011
University of DenverRacketeering Influenced and Corrupt Organizations Act (RICO)2011