John R. Posthumus
About John R. Posthumus
John R. Posthumus is a lawyer based in Denver, CO and has been recognized in The Best Lawyers in America® since 2018. John R. Posthumus is recognized in the following practice areas:
- Denver, Colorado
- Litigation - Intellectual Property
- Litigation - Patent
Current Firm: Polsinelli PC
Education: University of New Hampshire, Franklin Pierce School of Law, J.D., graduated 1991
Location: Denver, CO
Nearby Lawyers
Jason Moilanen is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. Jason, who practices law in Denver, Colorado, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jason is held by other top lawyers in the same geographic and legal practice area.
Daniel R. Coombe is a top attorney recognized by Best Lawyers in the practice area(s) of Insurance Law. Daniel R., who practices law in Denver, Colorado, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Daniel R. is held by other top lawyers in the same geographic and legal practice area.
Michael R. Greco is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Litigation - Labor and Employment. Michael R., who practices law in Denver, Colorado, has been recognized since 2019. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Michael R. is held by other top lawyers in the same geographic and legal practice area.
James G. Heckbert focuses his practice on claims involving personal injury and wrongful death, ski injuries, auto and truck collisions, construction site negligence, medical malpractice, gas explosions, and defective products. In a distinguished career spanning four decades, Mr. Heckbert has secured eight jury verdicts in excess of $1 million. He has obtained numerous other settlements and judgments for amounts also exceeding $1 million. Mr. Heckbert is a member of the Multi-Million Dollar Ad...
Amanda Tessar is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Intellectual Property and Litigation - Patent. Amanda, who practices law in Denver, Colorado, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Amanda is held by other top lawyers in the same geographic and legal practice area.
Alan C. Horowitz is a top attorney recognized by Best Lawyers in the practice area(s) of Health Care Law. Alan C., who practices law in Evergreen, Colorado, has been recognized since 2015. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Alan C. is held by other top lawyers in the same geographic and legal practice area.
Bill Groh is a trial-focused commercial litigator with LMB Partners in Denver, Colorado, representing clients in high-stakes disputes where precision, strategy, and decisive action matter. He handles complex cases involving contracts, business torts, intellectual property, fraud, and partnership conflicts, and is known for approaching litigation with a rigorous command of the facts and an unyielding commitment to advancing his clients’ positions. Bill’s practice centers on identif...
Tim Bounds is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Trusts and Estates and Trusts and Estates. Tim, who practices law in Denver, Colorado, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Tim is held by other top lawyers in the same geographic and legal practice area.
Hester M. Parrot has specialized in public finance law over the last 20 years, emphasizing charter school facility financings. She has extensive experience coordinating multidisciplinary financing teams to secure funding for charter schools’ permanent facilities in Colorado and throughout the country. She also assists other 501(c)(3) organizations and government entities—ranging from small towns and special districts to large cities, counties, and state-level issuers—achieve...
Harvey A. Steinberg, a managing partner in the Denver, Colorado law firm Springer and Steinberg, P.C., specializes in criminal law, white collar criminal defense, professional negligence law and personal injury law and appellate law. Mr. Steinberg has earned recognition as a skilled criminal defense trial attorney who has tried cases in federal, state and appellate courts, with reported cases. Over the course of a 30-plus year legal practice, he has regularly represented professional athletes...
Explore and Learn
2026 Best Lawyers Awards: Recognizing Legal Talent Across the United States
by Jamilla Tabbara
The 2026 editions highlight the top 5% of U.S. attorneys, showcase emerging practice areas and reveal trends shaping the nation’s legal profession.
Gun Rights for Convicted Felons? The DOJ Says It's Time.
by Bryan Driscoll
It's more than an administrative reopening of a long-dormant issue; it's a test of how the law reconciles the right to bear arms with protecting the public.
2026 Best Lawyers Awards in Canada: Marking 20 Years of Excellence
by Jamilla Tabbara
Honoring Canada’s most respected lawyers and spotlighting the next generation shaping the future of law.
How to Sue for Defamation: Costs, Process and What to Expect
by Bryan Driscoll
Learn the legal standards, costs and steps involved when you sue for defamation, including the difference between libel and slander.
Best Lawyers 2026: Discover the Honorees in Brazil, Mexico, Portugal, South Africa and Spain
by Jamilla Tabbara
A growing international network of recognized legal professionals.
How to Choose a Good Lawyer: Tips, Traits and Questions to Ask
by Laurie Villanueva
A Practical Guide for Your First-Time Hiring a Lawyer
Reddit’s Lawsuit Could Change How Much AI Knows About You
by Justin Smulison
Big AI is battling for its future—your data’s at stake.
Common-Law Marriage in Indiana: Are You Legally Protected?
by Laurie Villanueva
Understanding cohabitation rights and common-law marriage recognition in Indiana.
Unenforceable HOA Rules: What Homeowners Can Do About Illegal HOA Actions
by Bryan Driscoll
Not every HOA rule is legal. Learn how to recognize and fight unenforceable HOA rules that overstep the law.