Overview
Rayner advises and defends employers in a wide range of employment law matters at both the trial and appellate levels.
She represents clients in single-plaintiff lawsuits and complex class and collective actions involving claims under Title VII, the ADA, ADEA, FLSA, FMLA, Title IX, the Rehabilitation Act, and the Colorado Anti-Discrimination Act, among other federal and state laws. Rayner has experience handling matters before administrative agencies and in state and federal courts, offering clients strategic guidance through every stage of litigation.
Rayner counsels employers across industries on compliance with workplace laws and defends against claims involving discrimination, retaliation, wage and hour violations, and leave and accommodation disputes. Her experience includes navigating both administrative proceedings and high-stakes litigation, with a focus on clear, business-aligned legal solutions.
Rayner began her legal career as a law clerk for the Honorable Brian D. Boatright on the Colorado Supreme Court. She then practiced at an international law firm, where she focused on civil litigation and developed significant experience in appellate advocacy.
Rayner earned her B.A. in Political Science from the University of Colorado and graduated first in her class from the University of Alabama School of Law, where she served as an Articles Editor for the Alabama Law Review. Her strong academic foundation and practical litigation skills make her a valuable partner to employers navigating complex legal issues.
Honors & Recognition
- Recognized in The Best Lawyers in America® "Ones to Watch" for Litigation - Labor and Employment and Mass Tort Litigation/Class Actions - Defendants (2021-2026)
Credentials
Clerkships
- Hon. Brian D. Boatright, Colorado Supreme Court
Education
University of Alabama
- J.D., summa cum laude, 2014
- Order of the Coif
- Hugo Black Scholar
- Articles Editor of the Alabama Law Review
University of Colorado
- B.A., 2010
Media
News
Events
Legal Analysis
Constangy Streaming
- Alexandra "Sasha" Thaler, Partner - Boston, MADarrick L. McDuffie, Partner - Atlanta, GARayner Mangum, Senior Counsel - Denver, CO
- Rayner Mangum, Senior Counsel - Denver, CO
Professional & Civic Associations
Civic
- Big Brothers Big Sisters
Professional
- Colorado Bar Association
- American Bar Association, Labor & Employment Law Section
Services
Admissions
- Colorado, 2014
- U.S. District Court - CO
- U.S. Court of Appeals, Tenth Circuit
"Excellence is never an accident. It is always the result of high intention, sincere effort, and intelligent execution."
Aristotle




