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Colin D. O’Sullivan is an Arizona native with deep roots in the legal community. He earned his Bachelor of Business Administration Degree in Business Administration and Marketing from the University of San Diego where he graduated Cum Laude. Following his undergraduate education, Mr. O’Sullivan received his Juris Doctor from the University of Arizona, James E. Rogers College of Law. While in law school, Colin took advantage of the February Bar Examination and took the bar exam early during his third year of law school. Mr. O’Sullivan graduated law school having already passed the bar exam which allowed him to begin practicing law immediately.
Mr. O’Sullivan worked for the Maricopa County Public Defender’s office for four years. Mr. O’Sullivan has extensive criminal defense experience having represented clients in thousands of felony matters and has handled all types of cases ranging from homicides to misdemeanors. He has extensive experience handling trials, evidentiary hearings, plea negotiations, oral arguments, and jury selection; conducting discovery analysis, legal research, investigation, and witness interviews; and writing motions and other legal pleadings.
As a trial attorney, Mr. O’Sullivan has tried felony jury trials ranging from 2nd Degree Murder and Sex Conduct With a Minor down to Robbery and Possession of Marijuana. He has received numerous favorable jury trial verdicts including obtaining not guilty verdicts on Aggravated Assault with a Deadly Weapon on Police Officers, Possession of Meth for Sale, Aggravated Assault with a Deadly Weapon, Molestation of a Child, Aggravated Assault, Kidnapping, Theft of Means of Transportation, Unlawful Use of Means of Tranportation, Burglary, Robbery and Possession of Marijuana. Mr. O’Sullivan’s oral advocacy and courtroom experience allows him to persuasively and passionately represent his clients.
Colin D. O’Sullivan is a member of the Arizona State Bar and is licensed to practice law in Arizona and the United States District Court of Arizona.
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Chat withState: Arizona
Acquired: 2015
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2929 E. Camelback Rd., Ste. 224, Phoenix, AZ, 85016
34 Client Reviews
Showing 16 - 20 of 34 reviews
Posted by Christen | April 13, 2022 | Hired Attorney | Criminal Defense
Colin O’Sullivan diligently advocated for my son, was attentive, prompt and effective.
Colin O'Sullivan diligently advocated for my son, was attentive, prompt and effective as his criminal defense attorney. On one matter he got him completely exonerated with charges dropped, and on another matter he negotiated a plea deal to protect him from an emotionally charged case with stacked evi...
Posted by anonymous | March 30, 2022 | Hired Attorney | Lawsuits & Disputes
Excellent Attorney
Colin was a great advocate for us during our situation. He helped us to remain calm, explained things in a way we could understand, and spoke up for us in court. We were able to leave with a positive outcome due to his expertise and client advocacy. Colin treated my family with respect and dignity d...
Posted by Fali | March 30, 2022 | Hired Attorney
Criminal case
Quick thinking, careful and thoughtful analysis. Able to analyze the case in detail. Strong affinity to strive for the greatest rights and interests for customers.
Posted by James | March 28, 2022 | Hired Attorney | Criminal Defense
Takes care of Bud and clients with care and concerns
Collin is very well educated and knowledgeable attorney. Collin knows the in and outs if the league system and he was prepared better than expected . He communicates and takes the best interest of his clients. If you want a great representation, and the best chance to get issues resolved and stay on ...
Posted by anonymous | October 01, 2021 | Hired Attorney | Lawsuits & Disputes
Great attorney! Effective, Hard-working, and results driven.
Colin was one of the friendliest attorneys that we met with before deciding which attorney to choose for our case. We debated picking one that seemed meaner who promised better results. In the end, Colin achieved great results (better than anyone suggested we could get) and was pleasant to work with ...
"Danny and I worked together at our previous firm. I observed Danny fight for his clients and not back down from prosecutors. He isn't afraid to advocate for his client in the courtroom and always has their best interests in mind. He can articulate the strengths and weaknesses of your case and won't sugar coat his advice. I endorse Danny for anyone looking for a criminal defense attorney that knows what they're doing!"
"Danny and I worked together for several years. Danny is a skilled and intelligent lawyer that truly cares about his clients. During my time working with Danny I was able to see first-hand his dedication to his cases and clients. I would highly recommend Danny to anyone looking to hire an attorney."
"Mr. O'Sullivan is a brilliant trial attorney. His knowledge of the law and compassion for clients is evident every time he steps in a courtroom. I fully endorse Mr. O'Sullivan."
Employment and labor lawyer
Criminal defense lawyer
Criminal defense lawyer
2022
Litigator Of The Year, American Institute of Trial Lawyers
2022
Client's Choice, Avvo
2021
Client's Choice, Avvo
2021
Top 40 Under 40, National Trial Lawyers Association
2021 - Present
Supervising Attorney, Suzuki Law Offices
2019 - 2021
Attorney, Suzuki Law Offices
2015 - 2019
Trial Attorney, Maricopa County Public Defender's Office
2022 - Present
American Institute of Trial LawyersMember
2021 - Present
National Trial Lawyers AssociationMember
2015 - Present
State Bar of ArizonaMember
Dismissed with Prejudice during trial
Not Guilty
Not Guilty
Not Guilty
Not Guilty
Not Guilty
Not Guilty
2015
JD - Juris Doctor
2011
BBA - Bachelor of Business Administration
2018
Advanced Trial Skills
2017
Trial Skills
English
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