Steven T. Mandelaris

Bar Admissions

  • Colorado, 2006
  • U.S. District Court for the District of Colorado
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Mr. Mandelaris’ practice focuses on litigation and appeals involving the defense of police officers, sheriffs and governmental officials in disciplinary across Colorado in state and federal courts, and administrative tribunals.  Mr. Mandelaris’ practice also focuses on complex civil litigation involving workers’ compensation, first and third party insurance coverage, personal injury, wrongful death, dram shop liability, criminal defense, and actions for divorce, custody and the modification and enforcement of judgments in domestic relation cases. Mr. Mandelaris has litigated cases throughout Colorado involving catastrophic personal injury, medical malpractice and insurance bad faith and had tried numerous cases to verdict.

Prior to joining Elkus, Sisson & Rosenstein, Mr. Mandelaris gained significant experience as an associate at a Denver law firm handling personal injury and workers compensation claims. Mr. Mandelaris is member of the Colorado Bar Association, Denver Bar Association, Denver Bar and the Colorado Trial Lawyers Association. Steven was admitted to the Colorado Bar in 2006 after having graduated in the top 20% of his class at the University Of Denver Sturm College Of Law. Mr. Mandelaris received his Bachelor of Arts in Supply Chain Management from the Eli Broad College of Business at Michigan State University. Mr. Mandelaris directed procurement, logistics and materials management within multinational automotive and telecommunications companies prior to transitioning into law.

Areas of Practice



  • Complex Civil Litigation
  • Workers’ Compensation
  • Third Party Insurance Coverage
  • Personal Injury
  • Criminal Defense

Bar Admissions

  • Colorado, 2006
  • U.S. District Court for the District of Colorado


  • Michigan State University, 1998
  • University of Denver, J.D., 2006

Dedicated to Justice

With over 15 years of experience, Elkus and Sisson, P.C. strives to give each of our clients the personalized attention they would get from a smaller firm with the experience and knowledge that a collaborative firm has to offer.

No matter what your legal issue, our responsibility is to provide you with individualized attention to help guide you through the legal process while keeping your goals in mind. Do not hesitate to contact us regarding your legal concerns and to learn how we can assist you in finding solutions to your legal issues.

Don Sisson

Lead Counsel

Reid Elkus

Lead Counsel

Steve Mandelaris

Litigation and Appeals Attorney

Zachary Wagner

Complex Civil Litigation Attorney

Michael L Cheroutes Jr.

Family Law Attorney

Lucas Lorenz


Professionals of Elkus & Sisson, PC

Mr. Elkus’ representation of his clients range from individual and small businesses to very large corporations in several areas of the law. Having litigated a vast array of cases in matters including: complex security cases; breach of contract; breach of partnership matters; constructions defect, personal injury and criminal matters, Mr. Elkus provides confidence in every … Continue reading "Steven T. Mandelaris"
Donald Sisson is an accomplished lead counsel with many successful outcomes in various areas of practice including Complex Civil Litigation, Construction Law, Real Estate Litigation, Corporate Disputes, and Police Defense. Bringing confidence and poise to every case, Mr Sisson has provided numerous clients winning litigation practices. For the last several years, Mr. Sisson has represented … Continue reading "Steven T. Mandelaris"