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Clarissa M. Collier

Of Counsel

P. 303.244.0155 | F. 303.244.1879


Clarissa Collier represents sophisticated clients in high-stakes personal injury, healthcare professional liability and commercial litigation matters. She is an experienced and effective advocate for clients, including at trial, where she has established her skill to lead at any phase.

In addition to her litigation practice, Clarissa brings extensive experience handling white collar cases and investigations. She has conducted independent internal investigations to minimize clients’ legal exposure and has responded to federal and state government investigations.

Clarissa is listed as a Colorado Rising Star, and was the recipient of the prestigious Gary McPherson Award for Outstanding Young Lawyer of the Year in 2016.


Healthcare Professional Liability

  • Successfully represented Universal Health Services as second chair in a negligence jury trial involving alleged patient-on-patient sexual assault in a mental health facility. The case settled favorably after close of the evidence and prior to closing statements.

Commercial Litigation

Personal Injury

  • Favorably settled a string of premises liability cases for a franchisor of more than 350 fast food restaurants.
  • Favorably settled a negligence case for a de minimis amount for a state sanctioned rodeo.

Investigations & Compliance

  • Represented an oil and gas developer in responding to a multi-agency securities investigation involving the Securities Exchange Commission and several state securities boards and divisions.
  • Conducted an internal investigation for a Fortune 500 holding company for various life insurance companies and investment firms relating to a former employee's allegations of retaliation, discrimination and violations of the Securities Exchange Act.
  • Represented a major defense service contractor in voluntarily disclosing potential export controls and trade sanctions violations to the Departments of State, Commerce, and Treasury.
  • Represented a defense service contractor in response to a Department of Justice investigation involving alleged Foreign Corrupt Practices Act violations.

Other Representative Experience

Publications & Speaking Engagements


  • "An Examination of the Collateral Source Rule," presented at the MedStar Defense Counsel's Virtual Retreat (June 24, 2021))


  • 2014 Associates Campaign for Justice—"May I See Your ID?," The Colorado Lawyer, Vol. 43, No. 4 (April 2014).
  • "Exploring the Limits of the In Pari Delicto Defense," ABI Young and New Members Committee eNewsletter, Vol. 10, No. 2 (March 2012).

Other Experience

Holland & Hart LLP

Legal Memberships, Activities, and Honors

Colorado Rising Stars
     Business Litigation, 2019-2021
     International, 2018
Gary McPherson Award for Outstanding Young Lawyer of the Year, 2016
Colorado Lawyers Committee Team of the Year Award 
     Lobato Litigation, 2012
American Bar Association
     Delegate to the ABA House of Delegates 
     Litigation Section
Colorado Bar Association, Board of Governors
Denver Bar Association
Faculty of Federal Advocates 
Sam Cary Bar Association 
Legal Aid Foundation of Colorado
     Board of Trustees, 2017-2018
     Associates Advisory Board, Co-Chair, 2015-2017

Community Memberships, Activities, and Honors

Ray of Hope Cancer Foundation, Chair of Board of Directors
Downtown Denver Leadership Program 
     Alumni Association
     Participant, 2012

Personal Interests

Enjoying the great outdoors, listening to live music, traveling, and watching the Denver Broncos

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