Jason A. Marquez

Jason A. Marquez

3.5
Rating: 8.8

Licensed for 17 years

Divorce and separation Lawyer at Denver, CO
Practice Areas: Divorce & Separation, Criminal Defense, Child Custody ... +3 more

950 South Cherry Street, Suite 508, Denver, CO

About Jason

Biography

Practice Areas

Fees and Rates

Cost

Free Consultation

$0 first 60 minutes

Hourly Rates

$ 250-350 per hour

Retainer

Always


Payment Methods

  • Cash
  • Check
  • Credit Card

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Licenses

Licensed in Colorado for 17 years

State: Colorado

Acquired: 2008

Active

No misconduct found

Location

Márquez Law

950 South Cherry Street, Suite 508, Denver, CO, 80246

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Jason A. Marquez's Reviews

Avvo Review Score

3.5 /5.0

21 Client Reviews

Showing 1 - 3 of 3 reviews | Communication Style

Posted by anonymous | January 21, 2026 | Hired Attorney | Child Custody

Deeply Disappointed

We retained Jason Marquez based on his strong initial presentation and positive Google reviews. At the outset, he indicated that achieving a 50/50 parenting schedule and joint decision-making authority was realistic. Unfortunately, after working with him for approximately five to six years, we were d...eeply disappointed with the level of advocacy, professionalism, and follow-through provided. While Mr. Marquez was capable of drafting emails and filing motions, his courtroom advocacy consistently fell short. During hearings, he failed to adequately challenge inaccurate claims made by the opposing party, did not contest evidence he later acknowledged was flawed or misused, and did not meaningfully advocate when a judge relied on incorrect information to modify our parenting time. Our original custody schedule was every Tuesday and every other weekend—yet under his representation, our Tuesdays were actually taken away. Aside from securing a 50/50 schedule during the summer months, there was little substantive progress toward the goals we were initially told were achievable. Communication and timeliness were also major issues. On one occasion, Mr. Marquez stated an important email would be handled within a couple of days, but no action was taken for nearly two weeks despite multiple follow-ups. A “final” version of that email was not provided until more than a month later, causing unnecessary delays. He later admitted that he should have met with us in person or by phone rather than relying on prolonged email exchanges, stating that the back-and-forth had left him confused about our objectives. By the end, it was clear he no longer understood what we were trying to accomplish. He repeatedly stated that his email inbox functions as his to-do list, meaning clients must send multiple reminder emails just to ensure tasks are addressed. Billing practices further compounded these concerns. We were charged full amounts for work that did not meet promised timelines or outcomes. Commitments outlined in his own contract were not consistently honored, yet billing continued regardless. We were left responsible for costs associated with delays and unmet assurances, including a closing letter that lacked a file he had promised would be included. Additionally, Mr. Marquez represented my mother in her divorce case, and her experience closely mirrored ours—minimal courtroom advocacy, little strategic effort, and substantial fees despite limited progress. Taken together, these experiences raise serious concerns about consistency, accountability, and overall value. We were also troubled by aspects of his professional conduct. He routinely ended calls by referring to us as “kids,” which felt dismissive, disrespectful, and indicative of how little he valued his clients. Given the length of representation and the significant financial investment, we expected far more proactive advocacy, transparency, and strategic leadership. Unfortunately, our experience did not meet those expectations. I would not recommend Mr. Marquez to anyone seeking meaningful progress in a custody case. With a caseload of 90+ clients, it became clear that our matter was lost in the shuffle.

Jason Marquez

Replied last February 09, 2026

Thank you for taking the time to share your feedback. We appreciate you sharing your perspective and are sorry to hear that your previous 5 start review has changed. Because confidentiality is important to us, we are unable to address specifics in a public forum. The outcomes in your cases are very aligned with Colorado law and the facts despite our extraordinary efforts to secure outcomes to the contrary. We would welcome the opportunity to discuss your concerns directly. Please feel free to contact our office.

Posted by Jon | March 08, 2018 | Hired Attorney

Excellent Service.

I am very happy with the service I received from Jason. He went above and beyond to be available and help me understand the dynamics of the law as it related to my personal case. His expertise was very valuable to me in making decisions for resolving the matter at hand.

Posted by Connie | October 09, 2014 | Divorce & Separation

Honest and Caring Guidence

I was afraid to get a divorce at first even though I had to leave my husband. Jason talked with me about my options, and was very clear about the bumpy road ahead. I decided it was time to file for divorce after my initial consultation, I’m grateful for Jason’s guidance and his honesty through the wh...ole process. He made me feel confident about proceeding and in the end I couldn’t have dreamed of a better result. Thank you so much!

See All Client Reviews

Jason A. Marquez's Lawyer Endorsements

Endorse Jason
Jane Grace Michalakes headshot
Jane Michalakes

Family lawyer | Aug 24

Relationship: Fellow lawyer in community

"I endorse this lawyer. Mr. Marquez is one of the hardest working attorneys I know."

Brianne Nicole Falgien headshot
Brianne Falgien

Family lawyer | Oct 29

Relationship: Fellow lawyer in community

"I endorse this lawyer."

Denise M. Minish headshot
Denise Minish

Divorce and separation lawyer | Oct 21

Relationship: Fellow lawyer in community

"I endorse this lawyer."

Dianne A. Van Voorhees headshot
Dianne Van Voorhees

Family lawyer | Oct 18

Relationship: Fellow lawyer in community

"I endorse this lawyer. Jason is sharp and organized.He works hard and gives back to the community."

Nathan F. J. Bucar headshot
Nathan Bucar

Family lawyer | Oct 17

Relationship: Fellow lawyer in community

"I endorse this lawyer."

Lauren M. Hulse headshot
Lauren Hulse

Divorce and separation lawyer | Aug 19

Relationship: Opposing Counsel on matter

"I endorse this lawyer."

Heather M. Coleman headshot
Heather Coleman

Divorce and separation lawyer | Oct 04

Relationship: Worked for lawyer

"I endorse this lawyer."

Kathryn Mccord Beck headshot
Kathryn Beck

Family lawyer | May 05

Relationship: Worked together on matter

"I endorse this lawyer. I have had the pleasure of working with Jason as a lawyer, and as a mediator. I have directly observed his skill and compassion as he seeks out the best possible outcome for his clients. He knows the law, and cares about people, to his client's great benefit."

Sara Michelle Cates headshot
Sara Cates

Unknown lawyer | Dec 02

Relationship: Worked together on matter

"I endorse this lawyer."

Sergei B Thomas headshot
Sergei Thomas

Family lawyer | Mar 16

Relationship: Fellow lawyer in community

"I endorse this lawyer."

Rachel L. Young headshot
Rachel Young

Unknown lawyer | Mar 16

Relationship: Worked for lawyer

"I endorse this lawyer."

Zachary Alexander Chapman headshot
Zachary Chapman

Divorce and separation lawyer | Mar 14

Relationship: Worked for lawyer

"I endorse this lawyer. Very knowledgeable and driven by positive outcomes for his clients."

Christopher Robert Basler headshot
Christopher Basler

Divorce and separation lawyer | Mar 02

Relationship: Worked for lawyer

"Jason is a hard working and efficient attorney who always zealously represents his clients. Jason is a technician in both negotiation and the court room which leads to very satisfied clients. He will fight tirelessly for you."

William Howard Van Horn headshot
William Van Horn

Divorce and separation lawyer | Dec 10

Relationship: Opposing Counsel on matter

"Mr. Marquez is very throrough and attentive to detail. He is a very zealous advocate of his clients. He is very competent and effective."

Michael Donivan Evans headshot
Michael Evans

Family lawyer | Oct 06

Relationship: Fellow lawyer in community

"I endorse this lawyer."

View All Endorsements
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Experience

Rating:  8.8 (Excellent)

Honors

2007

Oustanding Student Attorney Award, University of Denver Sturm College of Law

2007

Student Leadership Award, University of Denver Strum College of Law

Work Experience

2018 - Present

Managing Partner, Márquez Law

2008 - 2018

Senior Partner, Johnson Marquez Legal Group

Associations

2018 - Present

Law School...Yes We Can!

President

2017 - Present

Justice Sotoymayor Inn of Court

Member

2008 - Present

Rocky Mountain Children's Law Center

Guardian ad Litem

2008 - Present

Colorado Criminal Defense Bar Association

Member

2008 - Present

Colorado Bar Association

Member

2008 - Present

Colorado Hispanic Bar Association

Member

2008 - Present

Denver Bar Association

Member

2010 - 2014

Colorado Criminal Defense Institute

Board Member

2008 - 2010

Denver Bar Association, Metro Volunteer Lawyers

Volunteer Attorney

Education

2007

University of Denver Sturm College of Law

JD - Juris Doctor

2003

University of Colorado - Denver

MBA - Master of Business Administration

N/A

Westmont College

BA - Bachelor of Arts

Speaking Engagements

2015

Legal & Technology Expo

Technology in the Office and Courtroom

2015

Entertain & Ethics

Trying Cases with Technology

2013

Early Neutral Assessment

Early Neutral Assessment

2013

Colorado Bar Association

Technology in the Courtroom

2011

Collecting Attorney's Fees

Attorney's Liens and Judgments

Publications

Languages

English

Activity

Avvo Rating

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Avvo Rating Levels
10.0 - 9.0 Superb8.9 - 8.0 Excellent7.9 - 7.0 Very Good6.9 - 6.0 Good5.9 - 5.0 Average4.9 - 4.0 Concern3.9 - 3.0 Caution2.9 - 2.0 Strong Caution1.9 - 1.0 Extreme Caution