About Onello Law Group

Jason Onello, Esq.

Founder / Attorney

Onello Law Group was founded in 2017 by Jason Onello, Esq. Mr. Onello is lead attorney in all cases that come through his office and is always available for his clients; he is a litigation attorney with years of practice experience, primarily in Family Law, Personal Injury, and Probate litigation. Mr. Onello is known to be a highly technical attorney in the courtroom; details matter to him. Mr. Onello received awards for his legal writing in law school; it’s his passion and foundation for his practice. The entire office knows and appreciates what its founder wants: open communication, realistic expectations, and results-driven effort. In addition to his District Court caseload, Mr. Onello is also an appellate attorney, having succeeded on several appeals and “Writ Petitions” in front of the Nevada Appellate Courts. When Mr. Onello is not in the courtroom or in his office (which is rare), you can find him dangling from a rope hundreds of feet off the ground at Red Rock National Park or its surrounding area. Mr. Onello was born outside of Buffalo, New York; he is a big ice hockey fan, and enjoys the outdoors. He loves John Candy movies and listening to Jim Croce by a campfire.

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Leslee Carrescia, Esq.

Attorney

Ms. Carrescia is an Associate Attorney at Onello Law Group, with a focus on family law and criminal defense.  Ms. Carrescia combines strong advocacy with a practical, steady approach, guiding clients through difficult situations with clarity and care. After earning her juris doctorate in Las Vegas, Nevada, Ms. Carrescia clerked for the Eighth Judicial District Court, gaining valuable experience in a wide range of legal matters.  Ms. Carrescia made her way to the courtroom through years of foundational professional experience, particularly in aviation. As a commercial pilot and flight instructor, she developed a high degree of focus and quick thinking; Ms. Carrescia is trained to be “calm under pressure,” which is benefit shared with her clients in the courtroom. Originally from Illinois, Ms. Carrescia moved to Las Vegas over a decade ago; she is proud to call it “home.”  On the rare occasion that Ms. Carrescia is away from her desk or not in a courtroom, she enjoys spending time with friends, neighbors, and family—and rarely misses a chance to enjoy comfort food and country music.

Brian Garner

High Asset Divorce – Financial Analyst

Brian serves as the High Asset Divorce Financial Analyst at Onello Law Group, where he works alongside the firm’s attorneys on matters involving complex marital estates, business interests, and intricate financial portfolios. His role centers on untangling the financial side of divorce — tracing assets, reviewing account statements and tax records, organizing disclosures, and helping build a clear picture of the marital estate. Brian brings a meticulous, methodical approach to every file, ensuring that no account, asset, or obligation goes overlooked. Clients appreciate his responsiveness and his ability to translate dense financial information into terms that are easy to understand.

Before joining the firm, Brian spent years working in loans, finance, and banking, where he developed a sharp eye for the details that often determine outcomes in high-stakes matters. That background gives him a strong command of balance sheets, loan documents, valuations, and the regulatory frameworks that govern financial institutions — skills that translate directly into the divorce context, where hidden or misunderstood assets can significantly impact a client’s future. He is equally comfortable analyzing a stack of financial records as he is coordinating the logistics of a complex case. Around the firm, Brian is known for his steady demeanor, thoroughness, and willingness to dig into whatever challenge comes across his desk.

Rebecca Jimenez

Lead Paralegal

Rebecca serves as the Lead Paralegal at Onello Law Group, where she plays a central role in case management, client communication, and ensuring matters move efficiently from intake through resolution. With a background in business management and over two years with the firm, Rebecca brings both organizational strength and a practical, solutions-driven approach to her work.

Born and raised in Las Vegas, Rebecca has also spent significant time in Brazil visiting family, which has shaped her appreciation for different cultures and perspectives.

Rebecca is drawn to the legal field for its problem-solving demands. She excels at working through complex situations and takes pride in being a reliable point of contact for clients, making sure they feel heard and supported throughout the process.

Outside of the office, Rebecca enjoys attending live music events, reading, and weightlifting. She has a broad taste in music—from classic rock to alternative—and is always up for a great meal, especially sushi or Korean barbecue.