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Jonathan Leinheardt is an accomplished trial attorney with extensive experience in the areas of elder law, civil and probate litigation, domestic relations, and criminal defense.
Mr. Leinheardt consistently achieves valuable results for his clients both in and out of the courtroom through passionate advocacy and care. His unique, dynamic experience investigating and prosecuting racketeering and organized crime as a Queens County (NYC) Assistant District Attorney, along with his vast trial and appellate experience, enables him to reach favorable outcomes for clients at all stages of representation in a variety of legal matters.
Since 2015, he has been a member of the Board of Directors of REACH Charter School in Denver, one of the first and only elementary schools in Colorado providing a fully inclusive learning experience for students with disabilities, as well as for their non-disabled peers. As Chair of the Board’s Governance Committee, Mr. Leinheardt manages the establishment of policies, practices, and procedures related to nonprofit organizations, monitors compliance with federal and state regulations by providing prudent and timely guidance to the board, and reviews and approves changes recommended by management, including issues regarding disclosures, policies and ethical considerations.
Mr. Leinheardt is now in his second year serving as Co-Chair of the Elder Law Section of the Boulder County Bar Association, and will continue focusing on the needs of older adults, people with disabilities, and at-risk individuals.
Mr. Leinheardt also enjoys coaching his son’s ice hockey team, the Colorado Ice Wizards, where he also serves as counsel to the Board of Directors.
5
Practice Areas
28 years
28 years
27 years
28 years
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Chat withState: Colorado
Acquired: 2003
No misconduct found
State: New York
Acquired: 1992
No misconduct found
250 Arapahoe, Suite 301, Boulder, CO, 80302
2 Client Reviews
Showing 1 - 1 of 1 review | Character & Conduct
Posted by Heather | January 17, 2026 | Hired Attorney | Probate
Jonathan is the lawyer you NEED!
If you want the absolute BEST attorneys your search ends here with Jessica Catlin and Jonathan Leinheardt at Strickler Catlin LLC. During what was undoubtedly one of the most difficult, devastating, challenging times of my life, this brilliant legal team proved to be invaluable. They are truly mast...
"I endorse this lawyer. He tenaciously represented a difficult client on a difficult case. While we were unable to reach a resolution, I respect his advocacy skills and legal acumen."
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2019 - Present
Partner, Stevens, Littman, Biddison, Tharp & Weinberg LLC
2007 - 2019
Associate, Stevens, Littman, Biddison, Tharp & Weinberg LLC
2004 - 2007
Associate, Stiner, Beck, Jonson & Nolan
1997 - 2003
Owner/Manager, Law Offices of Jonathan Leinheardt
1992 - 1997
Assistant District Attorney, Queens County District Attorney's Office
2017 - Present
Boulder County Bar AssociationCo-Chair of Elder Law Committee
2004 - Present
U.S. District Court District of Colorado
2003 - Present
Colorado Bar Association
1993 - Present
U.S. District Court Eastern District of New York
1993 - Present
U.S. District Court Southern District of New York
1993 - Present
U.S. Court of Appeals 2nd Circuit
1991
JD
English