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Mark Tod Sullivan

Criminal defense Attorney at Modesto, CA

5.0   1 review

also known as Law Office Mar T. Sullivan

  • Licensed for 34 years
    State CA
    Acquired 1989
    Not Eligible to Practice Law (Not Entitled) No misconduct found

We have not found any instances of professional misconduct for this lawyer.

About Mark

Learn Mark’s areas of practice.

Practice area
  1. Criminal defense
    Certified Criminal Law Specialist

    34 years

Mark Sullivan is a Certified Criminal Law Specialist with over 28 years of criminal law experience. Mr. Sullivan began his legal career in 1987 when he was admitted to the State Bar of Michigan Bar. In 1989, he was admitted to the State Bar of California and has been continuously practicing law in California ever since. Mr.Sullivan served as a Stanislaus County Deputy District Attorney from 1991 to 2003 where he was assigned to drug, career criminal, domestic violence, gang and homicide units. In 2003, Mr. Sullivan founded the Law Office of Mark T. Sullivan, an exclusively criminal defense practice and began his career as a criminal defense attorney.  Mr. Sullivan uses his prior prosecutorial knowledge to his advantage in order to help his clients build defenses in their criminal cases. In 2006, Mr. Sullivan was designated as a Certified Criminal Law Specialist by the State Bar of California Board of Legal Specialization. Throughout his legal career, Mr. Sullivan has taken over 100 felony and misdemeanor cases to jury trial. Mr. Sullivan is a Death Penalty qualified criminal defense attorney and has been a part of legal teams that have successfully got the death penalty dropped against their clients.


​We specialize in the defense of persons charged with criminal street gang crimes and enhancements by utilizing private investigators experienced in the defense of gang cases as well as qualified gang expert witnesses to counter the prosecution's gang experts at trial.


​Mr. Sullivan uses his extensive legal expertise and knowledge in association with with licensed private investigators and expert witnesses to get you the best possible result. Our firm uses a wide variety of experts including DNA, Forensic Pathologist, Gang, Gun Shot Reside and Cell Phone Forensics. Mr. Sullivan has also taught criminal law classes at several colleges in the area.  ​




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Law Office of Mark T. Sullivan
1231 8th St.
Suite 275
Modesto, CA, 95354


5.0 / 5.0
  1 customer review
5 Star
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1 Star
Posted by anonymous | July 30, 2015
This review is from a potential client who consulted with this attorney.
| Consulted Attorney
One of a kind!
He looked at my case gave the best and FREE advice to help me with my situation. 1 Felony 2 Misdemeanor charge. I went to other lawyers they asked $$$$across the board. Thank You! Mr. Sullivan.


  • Free Consultation 60 minutes
Payment methods
Cash, Check


AVVO RATING 7.4 (Very Good)

Work Experience

  • Atrorney
  • Law Ofiice of Mark T. Sullivan
  • 2003 - Present
  • Senior Deputy
  • Stanislaus County District Attorney's Office
  • 1991 - 2003


  • Wayne State University Law School
  • JD - Juris Doctor
  • 1986
  • Wayne State University
  • B.A
  • 1982

Languages Spoken

  • English
  • Spanish

Attorney endorsements

Received (3)
Given (0)
Endorse Mark
Criminal defense Attorney | Jun 03
Relationship: Fellow lawyer in community
"I endorse Mark. He is a highly skilled attorney that is well respected in the legal community."
Criminal defense Attorney | Feb 06
Relationship: Fellow lawyer in community
"I endorse this lawyer. Mr. Sullivan has been a valuable resource on numerous occasions. He is very experienced, and enjoys a fine reputation among his peers. I would recommend Mr. Sullivan highly to anyone in need of a Criminal Defense attorney."
Criminal defense Attorney | Jan 30
Relationship: Fellow lawyer in community
"I endorse this lawyer. Mark is a highly experienced criminal defense lawyer and is certified for capital murder cases. I use Mark as a resource in my own practice."
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Mark Tod Sullivan
Criminal defense Attorney
Modesto, CA
Free Consultation