Colin D. O’Sullivan - Phoenix, AZ
Attorney at Suzuki Law Offices, L.L.C.
Criminal defense Lawyers in Phoenix, AZ
2929 E. Camelback Rd #224 Phoenix, AZ 85016
- Free Consultation
- 1 Super Lawyers®
-
11
Years
Experience
Phoenix Criminal defense Lawyer
Updated: 09/15/2026
Areas of Practice
- Criminal defense
- Felony
- 2nd Degree Murder
- Robbery
Attorney Information
Overview
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 hundreds 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 to Robbery. 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, Aggravated Assault, Kidnapping, Burglary and Robbery. 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.
Awards and Honors
Awards
Other Sources of Feedback About Colin D. O’Sullivan
Included on the 2025 Southwest Super Lawyers list
Education
Legal Education
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The University of Arizona James E. Rogers College of Law,
Tucson,
Arizona
Juris Doctor
Non Legal Education
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University of San Diego
B.B.A.
Honors: cum laude
Major: Business Administration and Marketing
Current Employment Position(s)
-
Partner
Past Positions
- Maricopa County Public Defender’s office
Bar Admissions
- Arizona
- U.S. District Court District of Arizona
Other Affiliations
- Arizona State Bar Association (Member)
Photo
Contact
2929 E. Camelback Rd
#224
Phoenix, AZ 85016
Phone Number: 602-635-1369
Email: Send a message
Hours: 24/7
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