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Mark Beller
About Mark
Biography
Mark Beller is a veteran trial attorney and former prosecutor with the Maricopa County Attorney’s Office and the City of Scottsdale who has devoted his entire legal career to criminal law. With more than two decades of courtroom experience, he has built a reputation as a skilled, strategic, and relentless advocate for his clients.
Before entering private practice, Mr. Beller spent over a decade as a prosecutor, where he gained invaluable insight into how the State investigates crimes, builds cases, and seeks convictions. This insider knowledge allows him to anticipate prosecutorial strategies and develop effective, aggressive defense strategies designed to protect his clients at every stage of a case.
Mr. Beller graduated from the University of Arizona and earned his Juris Doctor from the Arizona State University College of Law. While in law school, he worked with both the Maricopa County Attorney’s Office and the Pima County Public Defender’s Office, giving him early exposure to both sides of the criminal justice system and helping shape his practical, balanced approach to criminal litigation.
After being admitted to the Arizona Bar, Mr. Beller served as a Deputy County Attorney with the Maricopa County Attorney’s Office for five years, where he prosecuted felony offenses and tried numerous cases. He was selected to serve in multiple trial divisions and was entrusted with mentoring and training new prosecutors, a responsibility given only to attorneys who demonstrate strong trial skills and sound judgment.
Mr. Beller later served as an Assistant City Prosecutor for the City of Scottsdale for six years, where he handled a high-volume caseload with a focus on DUI enforcement, juvenile offenses, commercial trucking violations, and retail liquor law cases. His prosecutorial experience includes cases ranging from misdemeanors to the most serious felony offenses, including DUI, drug crimes, aggravated assault, and homicide.
For the past 14 years, Mr. Beller has focused his practice on defending individuals accused of crimes and protecting their constitutional rights. He has represented clients in courts throughout Arizona and has handled thousands of criminal cases, including hundreds of jury and bench trials. He is known as a prepared, aggressive, and highly effective courtroom advocate who is not afraid to challenge the government’s case, expose weaknesses in the evidence, and fight for the best possible outcome.
At the same time, Mr. Beller understands that facing criminal charges can be one of the most difficult and stressful experiences a person can endure. He believes clients deserve not only a strong defense, but also clear communication, honesty, and respect. He takes the time to listen, to explain the process, and to make sure every client knows they have someone in their corner who truly cares about what happens to them.
By combining his extensive prosecutorial background, deep trial experience, and client-focused approach, Mr. Beller provides the kind of strong, strategic, and compassionate representation people need when their freedom, reputation, and future are at stake.
Practice Areas
2
Practice Areas
Criminal Defense
50%
25 years
DUI and DWI
50%
25 years
Fees and Rates
Cost
Payment Methods
- Cash
- Check
- Credit Card
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Chat withLicenses
Licensed in Arizona for 23 years
State: Arizona
Acquired: 2002
No misconduct found
Location
Weingart Law Firm
4500 S Lakeshore Dr #550, Tempe, AZ, 85282
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Mark Beller's Reviews
Avvo Review Score
42 Client Reviews
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Practice Areas
Showing 1 - 5 of 28 reviews | Case Results
Posted by Ryan | January 20, 2026 | Hired Attorney | Employment & Labor
Mark is amazing!
Mark is an amazing lawyer. He kept me informed throughout the process and put my mind at ease. He got me a great result and saved my job.
Posted by Alexa W | November 21, 2023 | Hired Attorney | Criminal Defense
Best lawyer ever
Thus was my court appointed lawyer and he worked for me as if I was paying him out if pocket he was fantastic! So personable and caring and really fought for me to get the best plea deal. I'm so happy with this lawyer and will totally pay for him if I need to in the future
Posted by Ben | August 03, 2022 | Hired Attorney | DUI & DWI
The best attorney in the Valley!
Mark is very detail oriented and hardworking for all of his clients. He kept me in the loop 24/7 throughout my case and whenever I had a question, he had an answer and an explanation ready for me. By his knowledge and expertise, you can tell that Mark has been in this business for awhile. I had my fi...
Posted by anonymous | July 22, 2019 | Hired Attorney | Criminal Defense
Open Container - dismissed
I had a great experience with Mark to dismiss all charges for an open-container violation. Mark was patient and strategic in his approach, but relentless in negotiations. His communication was great, and he provided me updates upon request. All charges were dropped with little to no time or effort r...
Posted by Jacob | August 06, 2018 | Hired Attorney | DUI & DWI
Phenomenal
Mark represented me on a complex case involving two super extreme DUIs with property damage and other related charges. The case was 5 or 6 years old and I had failure to appear warrants by the time I hired Mark. Mark knocked my case out of the ballpark. Another attorney had prepared me to do a yea...
Mark Beller's Lawyer Endorsements
"I endorse this lawyer. I have had the pleasure of both working with Mark (as a defense attorney) and against Mark (when he was a prosecutor) and he is an excellent lawyer and a tireless advocate for his clients."
"Mark is an amazing attorney with a lot of experience in Criminal Defense/DUI. He works hard for his clients. I endorse this lawyer."
"Mark is extremely dedicated to his clients. He is an excellent Attorney."
"I endorse this lawyer."
"I first met Mark when he was a prosecuting attorney for several DUI cases. He was very effective at his duties as a prosecutor and I have come to know his skills even more now that he is defending those cases. He is well liked by his clients because he is diligent and obtains some incredible results for his clients. I endorse Mr. Beller."
"I endorse this lawyer."
"I endorse this lawyer."
"I endorse this lawyer."
"Mark is an excellent criminal defense attorney. He gets great results by drawing on his experience working as a prosecutor for many years. He sees both sides of every case and creatively uses this insight to his advantage. I recommend and trust Mark. I endorse this lawyer."
"Mark is an extremely talented and skilled lawyer who gets great results. He is widely admired in the legal community for his DUI trial wins."
"Mark is a fantastic attorney with a lot of experience. He has achieved a long list of successful outcomes on many cases."
"Mark is an experienced and dedicated criminal defense attorney with the experience that few can match. Mark Beller is highly skilled and aggressive, yet compassionate towards his clients needs."
"I have worked with Mark on matters in the past. He is a talented attorney both in and out of court. Very knowledgeable, organized, and an aggressive and effective litigator. I strongly endorse him."
"I endorse this lawyer."
"Mr. Beller is highly experienced and knowledgeable about the law, procedure, and the intricacies within prosecutorial agencies relevant to achieving successful resolution. These are attributes that take time and continued dedication to acquire - Mr. Bellar has passed the test of time and is devoted to resolve his clients' case positively. I seek him out often on material issues. Mark is a skilled negotiator and adviser--I recommend Mr. Beller in any type of criminal case."
"I've known Mr. Beller for many years and hold him in high regard as a friendly and skilled attorney."
"I highly recommend Mark. He is an exceptional trial attorney who takes the time to fight hard for his clients. He is very knowledgeable both about the law and the realities of the criminal process, and is able to use his knowledge to benefit his clients."
"I endorse Mar. He is a highly skilled attorney that is well respected in the legal community."
"I endorse this lawyer. A highly skilled and respected lawyer in the community."
"Mark is not only a talented and experienced criminal law practitioner, his communication and negotiation skills are extraordinary."
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Experience
Honors
2017
Peer Review Rated, Martindale-Hubbell
2016
Nominated 10 Best Criminal Law Attorneys, American Institute of DUI Attorneys
2015
Top 100 DUI Attorneys in Arizona, National Advocacy for DUI Defense
2015
Nominated "10 Best Attorneys in Arizona, Amewrican Institute of Criminal Law Attorneys
2014
10 Best Attorneys in Arizona, American Institute of DUI/DWI Attorneys
2014
Recognized as One of Arizona's Finest Lawyers, Arizona's Finest Lawyers
2012
5 Year Service Award, City of Scottsdale
2005
Dedicated Service Award, Office of the Maricopa County Attorney
Work Experience
2012 - 2025
Defense Attorney, Private Criminal Defense Firm
2006 - 2012
Prosecuting Attorney, City Of Scottsdale
2002 - 2006
Prosecuting Attorney, Maricopa County Attorney's Ofc
2001 - 2002
Prosecution Intern, Maricopa County Attorney's Ofc
Associations
2015 - Present
National College of DUI DefenseMember
2014 - Present
Arizona Attorneys for Criminal Justice
2014 - Present
National Association of Criminal Defense Lawyers
2002 - Present
State Bar of ArizonaMember
Sample of Legal Cases
DUI in Scottsdale City Court
DUI charges dropped
DUI in West Mesa
DUI dismissed, plead to Reckless Driving
Marijuana For Sale
Probation with no jail
DUI in Yavapai County
Dismissal of all charges
DUI Trial in Scottsdale City Court
Not Guilty
DUI in City of Phoenix
Dismissed by Prosecution two days before trial.
Aggressive Driving in Pinal County
All criminal charges dismissed.
Education
2015
Aggressive Defense of Accused Impaired Driver Seminar
Cert.
2014
National College for DUI Defense
Metrology: Science as the Best Defense
2012
The Art and Science of DUI Defense
Cert.
2001
Arizona State University Sandra Day O'Connor College of Law
JD - Juris Doctor
1995
University of Arizona
BA - Bachelor of Arts
Speaking Engagements
2016
ABC News
DUI Checkpoints
2013
Valley Youth Conference
Understanding Your Rights When Stopped By Police
2005
Maricopa County Training and Development
Prosecutorial Hammers: Understanding Allegations in Plea Offers.
2005
Maricopa County Attorney Training and Development
Online Investigative Resources For The Criminal Justice System.
2004
Maricopa County Attorney Training and Development
Fundamentals of Plea Writing in RCC
Publications
2014
RLG Criminal Defense Blog
Breath vs. Blood in a DUI Investigation
2014
RLG Law Blog
DUis on Electric Bikes
2005
Maricopa County Attorney Training and Development
Guide to Maricopa Justice Courts
2004
Maricopa County Attorney Training and Development
Preliminary Hearing Essentials
Languages
English
Activity
Legal Answers