
Credentials
Education
Recognition
Benchmark Litigation
Litigation Star, 2026
The Best Lawyers in America
Medical Malpractice Law - Defendants, 2026-2027
Colorado Super Lawyers
Super Lawyer, Personal Injury: Defense, 2026
Rising Stars, Personal Injury - Medical
Malpractice Defense, 2022-2023
Rising Stars, Business Litigation, 2019-2021
Rising Stars, International, 2018
5280 Magazine
Top Lawyer - Personal Injury: Defense, 2024
Colorado Lawyers Committee Team of the Year Award
Lobato Litigation, 2012
Bar and Admissions
Colorado
U.S. Court of Appeals, 10th Circuit
U.S. District Court, D. Colorado
U.S. District Court, D. Columbia
Legal Memberships
Gary McPherson Award for Outstanding Young Lawyer of the Year, 2016
Colorado General Counsel Mentoring Program, 2015 and 2017
American Bar Association, Former Delegate to the ABA House of Delegates, Litigation Section
Colorado Bar Association, Board of Governors, 2013-2019
Denver Bar Association
Faculty of Federal Advocates
Legal Aid Foundation of Colorado
Board of Trustees, 2017-2018
Associates Advisory Board, Co-Chair, 2015-2017
Community Activity
Colorado Lawyer Trust Account Foundation, Member of Board of Directors
Ray of Hope Cancer Foundation, Ex Officio Member of Board of Directors
Downtown Denver Leadership Program Alumni Association, Participant, 2012
Presentations
"From the Trenches: Fighting Junk Medicine," Claims and Panel Attorneys of American Excess Insurance Exchange.
"National Counsel, National Solutions," Medical Professional Liability Association's Claims Defense Forum.
"The Unwavering Collateral Source Rule," Colorado Defense Lawyers Association's Annual Conference.
"Living With & Mitigating the Threat of Medical Malpractice," University of Northern Colorado School of Nursing.
"An Examination of the Collateral Source Rule," MedStar Defense Counsel's Virtual Retreat.
Clarissa Collier is a first-chair trial lawyer and litigator who defends her clients in high-stakes catastrophic injury cases, including in the transportation, healthcare, and automobile manufacturing industries. Clarissa has won multiple jury verdicts and played key roles in numerous trials and arbitrations. She is well equipped to guide clients through every critical strategic decision before and during trial in order to achieve successful results for her clients.
Clarissa has also argued and briefed several appeals in the Tenth Circuit Court of Appeals, Colorado Court of Appeals, Minnesota Court of Appeals and the Wyoming Supreme Court.
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. She has also responded to federal and state government investigations, including investigations initiated by the U.S. Departments of State, Justice, and Treasury.
Cases
Won case-ending summary judgment for the largest and busiest hospital in the Washington D.C. area in a $190 million medical malpractice case in the Superior Court of the District of Columbia.
Won case-ending summary judgment for the largest and busiest hospital in the Washington D.C. area in a $190 million medical malpractice case in the Superior Court of the District of Columbia.
Secured a zero-dollar walkaway settlement from a plaintiff in Boulder County who demanded $10 million in a civil case following a high-profile alleged criminal assault.
Solo-chaired a fraud and negligent misrepresentation jury trial in federal court in Colorado arising from a business dispute.
Investigations
Represented a major brewing company in response to a Alcohol and Tobacco Tax and Trade Bureau investigation.
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.
Pro Bono
Successfully represented a terminally ill client in guardianship proceedings by obtaining appointment of guardians for the client's four minor children before his death.
Favorably settled a negligence case for nuisance value for a state sanctioned rodeo. The settlement allowed the rodeo to remain in business.
Represented a school district on a pro bono basis in a high-profile lawsuit challenging the constitutionality of the Colorado school finance system.

Clarissa Collier is a first-chair trial lawyer and litigator who defends her clients in high-stakes catastrophic injury cases, including in the transportation, healthcare, and automobile manufacturing industries. Clarissa has won multiple jury verdicts and played key roles in numerous trials and arbitrations. She is well equipped to guide clients through every critical strategic decision before and during trial in order to achieve successful results for her clients.
Clarissa has also argued and briefed several appeals in the Tenth Circuit Court of Appeals, Colorado Court of Appeals, Minnesota Court of Appeals and the Wyoming Supreme Court.
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. She has also responded to federal and state government investigations, including investigations initiated by the U.S. Departments of State, Justice, and Treasury.
Credentials
Education
Recognition
Benchmark Litigation
Litigation Star, 2026
The Best Lawyers in America
Medical Malpractice Law - Defendants, 2026-2027
Colorado Super Lawyers
Super Lawyer, Personal Injury: Defense, 2026
Rising Stars, Personal Injury - Medical
Malpractice Defense, 2022-2023
Rising Stars, Business Litigation, 2019-2021
Rising Stars, International, 2018
5280 Magazine
Top Lawyer - Personal Injury: Defense, 2024
Colorado Lawyers Committee Team of the Year Award
Lobato Litigation, 2012
Bar and Admissions
Colorado
U.S. Court of Appeals, 10th Circuit
U.S. District Court, D. Colorado
U.S. District Court, D. Columbia
Legal Memberships
Gary McPherson Award for Outstanding Young Lawyer of the Year, 2016
Colorado General Counsel Mentoring Program, 2015 and 2017
American Bar Association, Former Delegate to the ABA House of Delegates, Litigation Section
Colorado Bar Association, Board of Governors, 2013-2019
Denver Bar Association
Faculty of Federal Advocates
Legal Aid Foundation of Colorado
Board of Trustees, 2017-2018
Associates Advisory Board, Co-Chair, 2015-2017
Community Activity
Colorado Lawyer Trust Account Foundation, Member of Board of Directors
Ray of Hope Cancer Foundation, Ex Officio Member of Board of Directors
Downtown Denver Leadership Program Alumni Association, Participant, 2012
Presentations
"From the Trenches: Fighting Junk Medicine," Claims and Panel Attorneys of American Excess Insurance Exchange.
"National Counsel, National Solutions," Medical Professional Liability Association's Claims Defense Forum.
"The Unwavering Collateral Source Rule," Colorado Defense Lawyers Association's Annual Conference.
"Living With & Mitigating the Threat of Medical Malpractice," University of Northern Colorado School of Nursing.
"An Examination of the Collateral Source Rule," MedStar Defense Counsel's Virtual Retreat.
Cases
Won case-ending summary judgment for the largest and busiest hospital in the Washington D.C. area in a $190 million medical malpractice case in the Superior Court of the District of Columbia.
Won case-ending summary judgment for the largest and busiest hospital in the Washington D.C. area in a $190 million medical malpractice case in the Superior Court of the District of Columbia.
Secured a zero-dollar walkaway settlement from a plaintiff in Boulder County who demanded $10 million in a civil case following a high-profile alleged criminal assault.
Solo-chaired a fraud and negligent misrepresentation jury trial in federal court in Colorado arising from a business dispute.
Investigations
Represented a major brewing company in response to a Alcohol and Tobacco Tax and Trade Bureau investigation.
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.
Pro Bono
Successfully represented a terminally ill client in guardianship proceedings by obtaining appointment of guardians for the client's four minor children before his death.
Favorably settled a negligence case for nuisance value for a state sanctioned rodeo. The settlement allowed the rodeo to remain in business.
Represented a school district on a pro bono basis in a high-profile lawsuit challenging the constitutionality of the Colorado school finance system.

