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James J.L. Ahern
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About James
Biography
James J. L. Ahern is a Partner at Fuller & Ahern, P.C., where he represents clients in criminal defense, DUI/DWAI, domestic violence, assault and felony cases, as well as personal injury matters throughout Colorado. Known for his meticulous preparation, strategic courtroom advocacy, and strong communication with clients, Mr. Ahern is frequently trusted to handle high-stakes cases where experience and attention to detail matter.
Mr. Ahern earned his B.A. from the University of Colorado Denver, graduating cum laude and with distinction, and obtained his Juris Doctor from the University of Denver Sturm College of Law in 2010.
As a former Deputy District Attorney, Mr. Ahern gained extensive courtroom and trial experience early in his career. He conducted numerous felony and misdemeanor jury trials and successfully prosecuted a wide range of cases, including first-degree murder, arson, vehicular homicide, assault, domestic violence offenses, DUI, and marijuana cultivation/possession cases. This insider perspective gives him a significant advantage when defending clients becuase he understands how prosecutors evaluate cases, negotiate plea offers, and present evidence at trial.
Mr. Ahern entered private practice in 2012 when he joined Susan Fuller & Associates, P.C. In 2022, he became a Partner in the firm, now known as Fuller & Ahern, P.C. He has dedicated his practice exclusively to litigation and regularly represents clients facing DUI/DWAI charges, domestic violence allegations, and serious felony offenses. He also handles personal injury claims, including motor-vehicle collisions and premises-liability cases.
Mr. Ahern’s work has been repeatedly recognized by national legal organizations:
The National Trial Lawyers: Top 40 Under 40 (2014–2021), honoring exceptional young trial lawyers for superior results and leadership.
The National Trial Lawyers: Top 100 Criminal Defense Lawyers (2017–present), an invitation-only distinction awarded to the premier criminal trial attorneys in each state.
Super Lawyers Colorado Rising Stars (2016–2021), an honor reserved for only 2.5% of Colorado attorneys who demonstrate excellence in the practice of law.
Clients appreciate Mr. Ahern’s responsiveness, thorough communication, and ability to break down complex legal issues into clear, actionable advice. Whether negotiating a dismissal, litigating a contested hearing, or preparing a case for trial, he is committed to achieving the best possible outcome and guiding clients through every stage of the process with professionalism and compassion.
Mr. Ahern is licensed to practice in all Colorado state courts and represents clients throughout the Denver Metro area and the State of Colorado.
I pride myself on attention to detail and zealous, aggressive advocacy for every client.
Practice Areas
4
Practice Areas
Criminal Defense
60%
DUI and DWI
15%
Personal Injury
15%
Family
10%
Fees and Rates
Cost
Payment Methods
- Cash
- Check
- Credit Card
Licenses
Licensed in Colorado for 15 years
State: Colorado
Acquired: 2010
No misconduct found
Location
Fuller & Ahern, P.C.
(303) 841-7620
Fax
19751 E Mainstreet Ste 270, Parker, CO, 80138
sfullerlaw.com/Attorneys/James-J-Ahern.shtmlJames J.L. Ahern's Reviews
Avvo Review Score
71 Client Reviews
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Practice Areas
What Clients Mention
Showing 16 - 20 of 20 reviews | Practice Area Knowledge
Posted by anonymous | July 21, 2016 | Hired Attorney | Divorce & Separation
Best Prepared Lawyer Ever
James was incredible in our family's divorce case. He was fair, compassionate, and above all, very well prepared and knew the law and the facts of the case inside and out. I've never been more impressed with an attorney than I was with James. I highly recommend him as an attorney and, if the ne...
Posted by Heather | May 02, 2016 | Hired Attorney | Divorce & Separation
Phenomenal Attorney - HIGHLY RECOMMEND
I was referred to James by a colleague that had just finished a divorce. In the first meeting with James he was extremely compassionate and exceptionally honest. My divorce was literally a combination of a poorly scripted Lifetime Movie and a Jerry Springer show, due to the volatility of my ex-spouse...
Posted by Lori | April 01, 2016 | Hired Attorney | DUI & DWI
Legal Services for DUI
James Ahern represented me on a DUI case. He attended all of my court hearings where I received the best case scenario for my sentence. Without the legal services of James I would be in a much worse predicament and he helped with my stress level and walking me through what to do within each step as...
Posted by Gary | October 16, 2013 | Criminal Defense
Case Dismissed!!!!
I hired James Ahern to represent me in a misdemeanor criminal defense matter in early 2013. His previous experience as a deputy district attorney was invaluable to me as he shredded the prosecution's case during the hearing. Case dismissed! James was knowledgeable, quick, passionate and very articula...
Posted by Loretta | October 10, 2013 | Divorce & Separation
The Best Divorce Attorney in Parker, CO
I hired Mr. Ahern as my divorce attorney. Mr. Ahern was always right there when I needed help. He was advising me on how to handle those extremely different divorce situations that were brought on me by my ex-husband. He was very persistent, confident, and knowledgeable throughout my divorce process,...
James J.L. Ahern's Lawyer Endorsements
"I endorse this lawyer. Just look at his reviews!!"
"I have seen James in court and have had the privilege of getting to know him over the past several years while practicing in the same area and field of law. What I have observed is James has terrific skills in the courtroom and has the respect of his colleagues and the court. I endorse him for anyone looking for a great litigator."
"James and I were opposing counsel on a divorce case with complex child related issues. He was tenacious, but fair and professional, which is what you expect from a seasoned advocate."
"James is trial tested attorney. Knowledgeable, aggressive, and treats his Client's with the respect they deserve. I enthusiastically endorse this lawyer."
"James is truly one of the best and brightest. James is on my short list of lawyers who I contact when I need expert advice. He cares about his clients, knows the law, and is masterful in the court. I can recommend James without any reservations."
"I endorse this lawyer."
"James Ahern is a natural trial attorney that is respected among professionals state wide. Mr. Ahern is detail oriented and provides highly effective advocacy in the fields of Criminal Defense and Domestic Relations. I would recommend Mr. Ahern to any person seeking the services of an aggressive attorney in the Denver Metro area."
"I have both worked with Mr. Ahern as well as been opposing counsel on matters with him. Mr. Ahern is a talented courtroom advocate with a passion for his clients, the law, and obtaining excellent outcomes. I endorse him wholeheartedly."
"James is a fantastic attorney, and I can say that as both having worked with him as a colleague and opposing counsel on a matter. He is a zealous advocate and shrewd negotiator. I highly recommend him."
"I've been fortunate enough to work with Mr. Ahern on various aspects of cases (including trial) and he is one of the best attorneys I've seen in litigation. He is great at handling cases and judges and juries are always impressed his knowledge of the law and how well he presents his arguments. I would recommend Mr. Ahern without reservation or qualification."
"Mr. Ahern is one of the best attorney's I know. His professionalism and knowledge of the law are impressive. I would hire him personally if I was in trouble with the law and needed an advocate. He is an attorney who truly cares about his clients. He has my endorsement."
"Top-notch attorney. Highly respected in the legal community."
"James Ahern and I had the pleasure of working together while we were at the District Attorney's office. I am not exaggerating when I say that he is one of the best trial advocates I have ever seen. Some of the most fun I had was doing trials with this man. We always tried to push each other to higher levels of artful advocacy. His knowledge of the law, care for his clients and trial skills are top notch. If you are looking for zealous advocacy, James knows no other way."
"I fully endorse this lawyer. I have tried many cases with Mr. Ahern while with the District Attorney's Office and in private practice. Mr. Ahern's trial skills are second to none. Whether facing criminal charges, a domestic relations matter, or a personal injury case James is absolutely the right man for the job. I have handed multiple sensitive criminal matters with Mr. Ahern, all of which resulted in superior results. James is absolutely a rising star in our legal community."
"Mr. Ahern's answers on Avvo are well-articulated, intelligent, and show good common sense. He is affiliated with Susan Fuller who is also an excellent attorney. I have been a judge, magistrate, prosecutor, defense attorney, general practitioner, and law professor over the past 24 years and would not hesitate to refer to Mr. Ahern."
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Experience
Honors
2021
Top 40 Under 40, National Trial Lawyers
2021
Top 100 Trial Lawyers, National Trial Lawyers
2021
Rising Star, SuperLawyers
2020
Top 40 Under 40, National Trial Lawyers
2020
Top 100 Trial Lawyers, National Trial Lawyers
2020
Rising Star, SuperLawyers
2019
Top 40 Under 40, National Trial Lawyers
2019
Top 100 Trial Lawyers, National Trial Lawyers
2019
Rising Star, SuperLawyers
2018
Top 40 Under 40, National Trial Lawyers
2018
Top 100 Trial Lawyers, National Trial Lawyers
2018
Rising Star, SuperLawyers
2017
Rising Star, Super Lawyers
2017
Top 100 Trial Lawyers, National Trial Lawyers
2017
2017 Colorado Rising Stars, SuperLawyers
2016
2016 Colorado Rising Stars, SuperLawyers
2016
Rising Star, Super Lawyers
2015
Top 40 under 40, National Trial Lawyers Association
2015
Top 10 Attorney Award, National Academy Of Personal Injury Attorneys
2014
2014 Avvo Clients' Choice Award, Avvo
2014
Top 40 under 40, National Trial Lawyers Association
2007
Academic Dean's List with Distinction, University of Colorado
2007
Cum Laude, University of Colorado
Work Experience
2022 - Present
Partner, Fuller & Ahern, P.C.
2012 - 2022
Attorney, Susan Fuller & Associates, P.C.
2010 - 2012
Deputy District Attorney, 4th Judicial District Attorney's Office
Associations
2016 - Present
Colorado Trial Lawyers AssociationMember
2014 - Present
National Trial Lawyers AssociationMember
2014 - Present
National Trial Lawyers Association - CriminalMember
2014 - Present
National Trial Lawyers Association - Motor VehicleMember
2012 - Present
Douglas/Elbert County Bar AssociationMember
2010 - Present
Colorado Bar AssociationMember
2009 - Present
Phi Delta Phi International Legal Honor SocietyAlumni
2010 - 2012
El Paso County Bar AssociationMember
Education
2010
University of Denver Sturm College of Law
JD - Juris Doctor
2007
University of Colorado
BA - Bachelor of Arts
Languages
English
Activity
Legal Answers
Legal Answers
Q&A
Pawning stolen jewelry a larceny charge?
01 Oct 2013
Q&A
How to handle Municipal Court Summons and Complaint for CRS 42-4-1409(3) town of Parker, County of Douglas, State of Colorado?
22 Sep 2013