Sharon Killoran, Legal Assistant

Sharon Killoran has worked in the legal field since 1982. She worked as a legal assistant for Doug Phillips, a well-respected workers’ compensation and social security disability attorney for 25 years. When Mr. Phillips passed away in 2008, Scott O’Sullivan offered Sharon a position at The O’Sullivan Law Firm and she appreciated the opportunity to work with a team of friendly, respected personal injury attorneys.

Sharon brings a wealth of knowledge and skills to the firm’s practice, helping with everything from medical records requests, writing settlement demands and bookkeeping. She finds the personal injury field very rewarding because she enjoys personally helping people through the difficult challenges they’re facing as a result of accidents.

While Sharon is kind and responsive to our clients’ needs, she is persistent and tireless when it comes to fighting for their rights. The O’Sullivan Law Firm is grateful for Sharon’s efforts on behalf of our clients.

Anna Grifa, Legal Assistant


Anna GrifaAnna Grifa has been working in the field of personal injury law for over a decade, serving as legal assistant to several firms in the Denver area before landing at The O’Sullivan Law Firm. She says her favorite aspect of this area of law is that she is able to help people who have been wronged through no fault of their own. She likes helping people put their lives back together.

Anna earned a bachelor’s degree in philosophy with a minor in political science from the University of Colorado at Denver. Throughout her career in the legal industry, Anna has assisted on all matters of claims related to bodily injury, UM/UIM, medical payments and property damage claims for automobile, motorcycle, bicycle and pedestrian accidents.

Born in Moscow, Anna is fluent in Russian and enjoys anything related to Zumba, yoga and camping, but most of her free time these days is spent keeping up with her family of rambunctious boys.

Brittany Ann Hansen, Paralegal

Brittany Ann Hansen is a paralegal with The O’Sullivan Law Firm. She has been working in the field of personal injury law for nearly five years and says her favorite part of personal injury is litigating unfair cases to provide clients with the best possible outcome.

Brittany earned her Paralegal Certificate with an associate degree in Applied Sciences from the Community College of Aurora. Her first job was with a high-volume law firm as a mail clerk where she earned promotions to become a litigation paralegal.

In her free time, Brittany revels in spending time with her two little girls, and she also enjoys football, boxing and softball.

Claudia Arellano, Legal Assistant


Claudia Arellano is a legal assistant with The O’Sullivan Law Firm. Previously, she worked for a high-volume law firm with the intake/investigator team but joined the O’Sullivan team where she found that the entire staff treats clients with more respect and provides higher quality service.

Claudia earned her associate degree in business from Red Rocks Community College and speaks Spanish fluently. She enjoys personal injury law because she has found that accident victims often don’t know critical information necessary to secure their rights and she enjoys helping them during what can be a stressful time.

Claudia has a son and the two of them enjoy hiking, football, swimming and trying new restaurants.