Atty. Gideon Cionelo
Gideon’s practice focuses on litigation. Before joining Osborn Maledon, Gideon clerked for Judge Jennifer G.
Profile Summary
About Gideon Cionelo at a glance
Gideon Cionelo is a business and litigation attorney based in Phoenix, Arizona, practicing at Osborn Maledon PA. They have 3+ years of legal experience, licensed to practice since 2023. Admitted to practice in Arizona (2023) and New Mexico (2024). Educated at Arizona State University (J.D., 2022). Recognitions include Best Lawyers in America — Commercial Litigation (2026). Serands clients in Phoenix, AZ and the surrounding metropolitan area.
Want to Get Service From This Attorney?
Sign up free and choose one of the two methods below.
Have a legal question? Sign up free, submit it through the Ask the Attorney module and receive a focused answer from a specialist.
- Free to ask a question
- Answers from specialist attorneys
- Optional private / anonymous question
Request an online video meeting or an in-person consultation at the attorney's office. Pick a time that works for you and share the details securely.
- Online video meeting
- In-person at the attorney's office
- Secure messaging and payment
About
- Gideon’s practice focuses on litigation
- Before joining Osborn Maledon, Gideon clerked for Judge Jennifer G. Zipps of the U.S
- District Court for the District of Arizona
- As a law clerk, he drafted civil orders and assisted in the administration of criminal and civil jury trials
- He also externed for Judge Daniel J. Kiley of the Maricopa County Superior Court and Judge Jennifer M. Perkins of the Arizona Court of Appeals
- His experience in trial and appellate courts provides him insight into how judges and juries decide legal and factual disputes
- He relies on this experience, and his prior work as a teacher and private investigator, when advocating for clients, explaining complex legal issues, uncovering facts in discovery, and preparing for trial
- Gideon graduated summa cum laude from the Sandra Day O’Connor College of Law at Arizona State University
- In law school, he was a teaching assistant, O’Connor Honors Fellow, Note and Comment Editor for the Arizona State Law Journal, and Center Scholar for ASU’s Center for Law, Science, and Innovation
- Outside the law, Gideon is involved in his community
- He runs a nonprofit that supports impoverished students in the Philippines and serves on the board of the Arizona Asian American Bar Association
Practice Areas Explained
Gideon Cionelo's Areas of Practice
Each practice area below reflects the types of cases Gideon Cionelo handles, with a brief overview of what that area of law covers.
Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.
Gideon Cionelo is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Arizona →
Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.
Gideon Cionelo is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Arizona →
Jurisdictional Context
Why local counsel matters in Arizona
Practicing law in Arizona. Legal matters in Arizona are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Phoenix are typically filed in the local municipal court or the appropriate Arizona state district court, depending on subject matter and amount in controversy. An attorney licensed in Arizona brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Arizona courts without local counsel or pro hac vice admission.
Looking for additional Arizona attorneys? Browse all attorneys in Phoenix or all attorneys in Arizona.
Frequently Asked
Common questions about Gideon Cionelo
Where is Gideon Cionelo's law office located?
What practice areas does Gideon Cionelo handle?
How long has Gideon Cionelo practiced law?
Where did Gideon Cionelo go to law school?
How can I contact Gideon Cionelo for a consultation?
What awards or recognition has Gideon Cionelo received?
Practice Areas
Education
Awards
Bar Admissions
Reviews
No reviews yet.