Thomas John Nellessen

PRO

Thomas John Nellessen

4.8
Rating: 9.5

Licensed for 34 years

Divorce and separation Lawyer at Englewood, CO
Practice Areas: Divorce & Separation, DUI & DWI, Violent Crime

385 Inverness Parkway, Suite 250, Englewood, CO

Virtual Consultation Available

About Thomas

Biography

Representing criminal and DUI clients for over 25 years. Free consultations. Military discounts.

Tom Nellessen is a skilled Denver DUI Attorney who has been doing DUI cases for over 25 years.

The Nellessen Law Office handles domestic violence related offenses. Highly skilled attorney.

Practice Areas

3

Practice Areas

Divorce and Separation 80%

Dissolution of marriage cases can be extremely difficult to navigate around. The waters are vicious and attorneys only seem to care about "winning." Nobody wins in a divorce case. Compation, experience and knowledge work best in these matters.

35 years | 275 cases

80%
DUI and DWI 10%

DUI law is our main specialty at The Nellessen Law Office. We have been serving the Denver metropolitan area for over 25 years. We always give a free consultation and we are here to answer whatever questions that you might have.

35 years | 2,000 cases

10%
Violent Crime 10%

Domestic violence charges are very serious and should not be taken lightly. These kinds of cases will affect your life in much the same way as felony matter. Hire an attorney immediately if you are charged with a Domestic Violence related misdemeanor or felony.

35 years | 500 cases

10%

Fees and Rates

Cost

Hourly Rates

$ 450-450 per hour


Payment Methods

  • Check
  • Credit Card

Awards

Top Contributor
Top Contributor
2017 2016
Client's Choice
Client's Choice
2016

Licenses

Licensed in Colorado for 34 years

State: Colorado

Acquired: 1991

Active

No misconduct found

Location

Johnson Law Group

385 Inverness Parkway, Suite 250, Englewood, CO, 80112

johnsonlgroup.com/

Online Presence

Other places you can find Thomas online.

Thomas John Nellessen's Reviews

Avvo Review Score

4.8 /5.0

16 Client Reviews

Showing 1 - 1 of 1 review | Ethics & Professional Responsibility

Posted by Rosella | October 23, 2025 | Hired Attorney | Ethics & Professional Responsibility

My child safety was in this man’s hands and I was overcharged as if I would never realize and with no explanation or correction

I was handed over to Thomas at Johnson’s Law Group, where I was overcharged and billed for things that had nothing to do with my case. The invoices included wrong names and dates, and I never received any correction or explanation despite asking multiple times. After the original attorney left, I was... suddenly billed at a higher rate without any option or approval, which only added to the confusion and expense. The lack of accountability and transparency made the entire experience stressful and costly. I eventually had no choice but to hire another law firm to correct the mistakes and start over. I would not recommend Thomas or this firm to anyone seeking honest or professional representation.

See All Client Reviews

Thomas John Nellessen's Lawyer Endorsements

Endorse Thomas
Genet Johnson headshot
Genet Johnson

Unknown lawyer | Apr 09

Relationship: Worked together on matter

"There’s a reason clients come back to Attorney Nellessen, he doesn’t just handle cases, he builds trust. His sharp thinking and measured approach make every case stronger. A cornerstone of our litigation team at Johnson Law Group."

Maren Jori Skulborstad headshot
Maren Skulborstad

Family lawyer | Jul 02

Relationship: Supervised lawyer

"Tom is an extremely passionate about helping people both in his career and on his own free time. He is very knowledgeable, level headed, and takes the time to listen to his clients. Tom analyzes cases from the other prospective, looking at all sides of a case to avoid any surprises and holes in his theory. These attributes makes his advice and recommendations trustworthy and solid. It has been a pleasure working with Tom."

Chris Halsor headshot
Chris Halsor

Criminal defense lawyer | Oct 24

Relationship: Co-worker

"I have had the pleasure of working with Tom Nellessen. He is Of Counsel in the same firm where I work in a similar capacity. I have had many occasions to review cases with him. Tom has many years of experience and a really good feel for how to handle cases. He is well regarded by prosecutors, judges and other members of the defense bar. He works his cases to obtain just outcomes for his clients."

Mark S. Solomon headshot
Mark Solomon

DUI and DWI lawyer | Oct 10

Relationship: Fellow lawyer in community

"I have spent much time over the years speaking to Mr. Nellessen about many legal issues. He is a knowledgable, confident, experienced attorney worthy of the respect and esteem he commands in the legal community."

Malcolm Burns Seawell headshot
Malcolm Seawell

DUI and DWI lawyer | Oct 10

Relationship: Fellow lawyer in community

"I've known Tom professionally for 28 years, having first met him when I was a young DA in Douglas County. Tom was then and is today an extremely gifted advocate and leave no stone unturned in the pursuit of justice for his client. He has my highest endorsement."

H. Scott Aalsberg headshot
H. Aalsberg

DUI and DWI lawyer | May 24

Relationship: Fellow lawyer in community

"If your in trouble with the law you need a lawyer with knowledge, experience and the know how to get things done. You can find many lawyers to take your case but if you need to Win you only have one choice Thomas J. Nellessen, Esq. I endorse him."

Molly Falk Jansen headshot
Molly Jansen

Criminal defense lawyer | May 11

Relationship: Fellow lawyer in community

"I am honored to endorse Mr. Nellessen. He is one of the most professional, committed, and talented attorneys in our community. He is dedicated to forging strong client relationships and is committed to going above and beyond in representing his clients. He is highly respected for his litigations skills and I highly recommend him."

Robert Biondino Jr. headshot
Robert Biondino

DUI and DWI lawyer | May 11

Relationship: Fellow lawyer in community

"I endorse this lawyer. Tom know criminal law! He is honest, aggressive, and hard working. I've worked cases with him, and even after representing over 3500 clients, Tom taught me a few things about bettering myself as an attorney! I'd hire Tom for myself!"

H. Michael Steinberg headshot
H. Steinberg

Criminal defense lawyer | May 04

Relationship: Fellow lawyer in community

"Few individuals come close to approaching the kind of intelligence and integrity in the practice of Colorado criminal law than Tom Nellessen. Tom is well known and well respected for the lengths he will go to aggressively advocate for his clients. He is not only admired by his colleagues in his field - he is admired and respected by the many Colorado judges in the criminal courts all over Colorado. Tom is the man I choose to consult when I have a particularly difficult criminal question - his thinking is clear - his advice sound - his counsel wise. I wholly endorse Tom as a man of unquestionable character - and I endorse him without reservation.. H. Michael Steinberg"

Craig Noel Mastro headshot
Craig Mastro

Criminal defense lawyer | May 04

Relationship: Fellow lawyer in community

"Tom is a stellar courtroom attorney, blessed with skill, talent and personality which make him uniquely qualified for criminal defense. Importantly, I also know Tom to be a person of unassailable character. I would not hesitate to refer friends and family members to Tom, and I endorse him in the highest possible terms."

Robert Mark Grossman headshot
Robert Grossman

Criminal defense lawyer | May 04

Relationship: Fellow lawyer in community

"I endorse this lawyer. I have known and watched Tom represent clients sucessfully for 25 years. He is respected within the legal community by Judges, district attorneys and lawyers. His dedication to acheiving justice is always his focus. Tom gives his all helping people in need, and they are fortunate to have hired Tom to represent them."

Michael Aaron Goldstein headshot
Michael Goldstein

DUI and DWI lawyer | Dec 12

Relationship: Fellow lawyer in community

"Attorney Thomas Nellessen is a dedicated professional who will aggressively fight for his clients. He is highly respected by his colleagues as well as current and former clients. He is an asset to our legal profession."

Benjamin W. Hartford headshot
Benjamin Hartford

DUI and DWI lawyer | Feb 07

Relationship: Friend

"I endorse this lawyer. Tom is an experienced and well regarded trial lawyer who will both listen to you and work hard to achieve your goals as a client."

Christopher Daniel Leroi headshot
Christopher Leroi

DUI and DWI lawyer | Jan 03

Relationship: Fellow lawyer in community

"I endorse this lawyer. From Mr. Nellessen's detailed and thoughtful answers, he proves that he is an excellent attorney and that you would be well-served with his representation."

View All Endorsements
Robert Lawrence Barlow headshot
Robert Barlow

Insurance lawyer

Mark S. Solomon headshot
Mark Solomon

Criminal defense lawyer

Malcolm Burns Seawell headshot
Malcolm Seawell

Criminal defense lawyer

Chris Halsor headshot
Chris Halsor

Criminal defense lawyer

H. Scott Aalsberg headshot
H. Aalsberg

Criminal defense lawyer

Robert Biondino Jr. headshot
Robert Biondino

Criminal defense lawyer

Benjamin W. Hartford headshot
Benjamin Hartford

Criminal defense lawyer

H. Michael Steinberg headshot
H. Steinberg

Criminal defense lawyer

Molly Falk Jansen headshot
Molly Jansen

Criminal defense lawyer

Craig Noel Mastro headshot
Craig Mastro

Criminal defense lawyer

Robert Mark Grossman headshot
Robert Grossman

Criminal defense lawyer

Experience

Rating:  9.5 (Superb)

Honors

2020

Top 100 Trial Lawyers, National Trial Lawyers

2017

Distinguished, Martindale-Hubbell

2016

Notable, Martindale-Hubbell

2015

Notable, Martindale-Hubbell

Work Experience

1991 - 2024

Owner, Nellessen Law Office

Associations

2014 - Present

DUI Defense Lawyers Association

Member

2012 - Present

Douglas/Elbert County Bar Association

Member

1991 - Present

Colorado Bar Association

Member

1991 - Present

Colorado Criminal Defense Bar Association

Member

2019 - 2020

National Trial Lawyers Association

Member

Sample of Legal Cases

People V. Adrian V.

Not Guilty

People vs. Tracy E.

Not Guilty DUI, Not Guilty DWAI, Guilty Careless Driving

.366 BAC Dismissed

Cased Dismissed

People vs. Jason T.

Case Dismissed

People v. Daniel D.

Not Guilty on All Charges

See More Legal Cases

Education

1990

Northern Illinois University of Law

JD - Juris Doctor

Speaking Engagements

N/A

Looking for Conference

None at this time.

Publications

Languages

English

Activity

Top Contributor

Thomas earned significant contribution points in 2017.

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