The Firm | Law Offices Of Parker & Irwin

Our Legal Team of Experts

At the Law Offices of Parker & Irwin, our attorneys provide aggressive, innovative, and thoughtful legal defense strategies to workers’ compensation cases. They adhere to client requirements, are responsive to their needs, and maintain open communication until a claim is resolved. Well-respected in the legal community for our professionalism, experience, and knowledge, we participate in corporate review meetings. Our policies and procedures are based on efficiency and cost-effectiveness. Our attorneys are featured speakers at seminars, routinely promote client education by conducting no-cost classes, and write articles on case law updates and issues of interest to the workers’ compensation community.

Paralegals

Administration

Legal Support

Scott M. Tilley

President
Managing Attorney

Inland Empire
Certified Specialist,

Workers’ Compensation Law,

The State Bar of California

Board of Legal Specialization.

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Mr. Tilley was born in Bellflower, California. He received his B.A. from the University of California, Irvine in 1996 and his Juris Doctorate from the University of California Los Angeles in 1999. He was admitted to the California State Bar in 2000. He is a Certified Specialist, Workers’ Compensation Law, The State Bar of California Board of Legal Specialization. He is a member of the American Bar Association, San Bernardino County Bar Association, and the California Workers’ Compensation Defense Attorneys’ Association.

Mr. Tilley has also served as a pro tempore Workers' Compensation Judge at the Workers' Compensation Appeals Board in Riverside, California.

Mr. Tilley has been practicing law with the Law Offices of Parker & Irwin since 2000 and became president of the firm in 2018.

Geoffrey H. Spencer

CFO
Managing Attorney

Orange County

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Mr. Spencer was born in Alexandria, Virginia. He received his B.A. from San Francisco State University in 1987. In 1990, he received his Juris Doctorate from Pepperdine School of Law and was on the Dean’s List and on scholarship. He was admitted to the California State Bar in 1990 and is a member of The Orange County Bar Association.

Mr. Spencer has been practicing law with the Law Offices of Parker & Irwin since 1990

Bruce A. Little

Board Secretary
Managing Attorney

Los Angeles County

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Mr. Little was born in Hollywood, California. He received his B.S. in 1986 from California State Polytechnic University in Pomona, California, and his Juris Doctorate from California Western School of Law in 1991. He was admitted to the California State Bar in 1991 and is admitted to practice before the United States District Court, Southern District of California. He was the recipient of the American Juris Prudence Award in Trial Practice.

Mr. Little has been practicing law with the Law Offices of Parker & Irwin since 2004.

Barry A. Saperstein

Shareholder
Managing Attorney

Northern & Central California

Certified Specialist,

Workers’ Compensation Law,

The State Bar of California

Board of Legal Specialization

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Mr. Saperstein was born in Jersey City, New Jersey. He received his B.A. in political science from the University of Southern California and his Juris Doctorate from the Thomas Jefferson School of Law in 1997. He was admitted to the California State Bar in 1999 and is admitted to practice before the United States District Court, Southern District of California, Central District of California, and Eastern District of Wisconsin and is a member of the San Bernardino County Bar Association.

He initially began his career in the criminal law arena. He has been practicing workers’ compensation defense, including 132a and serious and willful misconduct claims, since 2004. He is a Certified Specialist, Workers’ Compensation Law, The State Bar of California Board of Legal Specialization.

Mr. Saperstein has been practicing law with the Law Offices of Parker & Irwin since 2013.

Kellie Aden

Shareholder
Managing Attorney

San Diego County

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Ms. Aden was born in Phoenix, Arizona. She received her B.A. in oceanography from the University of San Diego in 1997 and her Juris Doctorate from Western State University College of Law in 2001, receiving the Witkins, International Law Association Honor Roll. She was admitted to the California State Bar in 2002. With over 12 years’ experience in workers’ compensation defense, Ms. Aden has appeared at judicial and administrative hearings in all Southern California venues as well as analyzed complex legal and factual issues in order to defend against claims and present defense strategies to clients

Ms. Aden has been practicing law with the Law Offices of Parker & Irwin since 2014.

Thomas L. Bolinger

Of Counsel

Adjunct Professor, Business Law

Point Loma Nazarene University

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Mr. Bolinger was born in Fullerton, California. He received his B.A. in 1978 from Point Loma Nazarene University and his Juris Doctorate from the University of San Diego in 1984. He was admitted to the State Bar of California in 1984. In 1978, he was listed in Who’s Who Among Students in American Universities and Colleges and is a member of Phi Delta Lambda Scholastic Honor Society, and The San Diego County Bar Association. Mr. Bolinger is also currently serving as the adjunct professor of business law at Point Loma Nazarene University in San Diego.

Mr. Bolinger has been practicing law with the Law Offices of Parker & Irwin since 1987 and served as president of the firm from 2012-2018. He has received an AV Preeminent Rating in the Martindale-Hubbell Attorney Directory.

John C. Martin

Of Counsel

Founder and Partner of

Lister, Martin & Thompson, LLC

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Mr. Martin Is admitted to practice before the California Supreme Court, the Federal District Court of Appeals, and the United States Supreme Court. A member of the panel of arbitrators at the WCAB, he is a trained mediator, and periodically serves as Judge Pro-Tem. He received a B.A. in International Relations from UCLA and his Juris Doctor degree in 1969 from Loyola University of Los Angeles.

Upon his discharge from military service after serving as a captain in the United States Marine Corps Reserve,

Mr. Martin entered private practice in the workers’ compensation field specializing in the defense of employers. Mr. Martin has served as a law instructor, panelist, and lecturer on topics ranging from ADR to ADA and FEHA as well as topics within the workers’ compensation field.

Mr. Martin joined our firm in 2024 as Of Counsel as he works toward his retirement from Lister, Martin & Thompson, LLP. We look forward to the bright future ahead as we join forces in providing exceptional legal representation with workers' compensation defense claims.

Paralegals

KIM S. NGY

Paralegal to Scott M. Tilley, Esq.

Kim S. Ngy is a well-versed and highly skilled Paralegal with over 16 years of workers’ compensation defense experience. His analytical and detail-oriented approach to his work makes him highly regarded for record review and summarization. His vast experience has given him a catalog of knowledge of the workers’ compensation system enabling him to work quickly and efficiently. He is proven to be highly adept with a defense mindset, placing our client’s best interest as his priority. His innate hardworking character alongside his diverse skill set makes him the perfect team player to assist Scott M. Tilley, Esq., Managing Attorney, President.

Mr. Ngy has earned his Certificate in Paralegal Studies from the University of California, Irvine and Certificate for AMA Guides Impairment Assessment from WorkCompCentral®. He received his bachelor’s and master’s degrees from the Royal University of Law and Economics in Cambodia. His passion for law and attention to detail give Mr. Ngy exceptional insight into the complexities of each case.

LAURIE RENFRO MITCHELL

Paralegal - Lien Specialist, Bill Reviewer

Laurie Renfro-Mitchell is a highly experienced Paralegal and Lien Specialist with over 20 years of workers’ compensation background. She is skilled in complex legal research, trial and witness preparation, generating detailed file reports for clients, and more. She is well known across the state’s WCABs for her professional demeanor, assertive negotiating skills, and thorough lien resolution. She resolves matters timely while analyzing potential issues (past, present, and future). Her vast experience with workers’ compensation defense firms, insurance carriers, and lien companies provides her with unique insight into creating winning solutions for our clients.

Ms. Renfro-Mitchell earned her Certificate in Paralegal Studies alongside her Associate Degree. Her IEA Certification (Claims Adjuster in Workers’ Compensation) gives her a multi-faceted perspective on our client’s needs and expectations. She is known for going above and beyond and is highly regarded among colleagues for her strong ethical nature, positive character, and dedication to her work.

LISA HEFFRAN

Lien Resolution Unit

Director

Ms. Heffran serves as the indispensable paralegal and client liaison person. An individual with an abundance of energy, enthusiasm, and intelligence, she attended the University of Iowa and then moved from Iowa to Long Beach, California where she went to work in the accounting department of an oil company and took classes at Long Beach City College to develop and improve those skills. Finding that was crushingly boring, she began her career in the legal field, working in transaction, corporate, banking, personal injury, insurance defense and civil litigation before, to her delight, stumbling upon the Holy Grail of all legal practice areas, Workers’ Compensation.

Ms. Heffran completed the necessary coursework for and holds, a Paralegal Certification from California State University Monterey Bay. She is responsible for negotiating liens, attending Lien Conferences and Trials, prepares Pre-Trial Conference Statements, drafts, under the direction of the handling attorney, Trial Briefs, objects to and prepares Declarations of Readiness to Proceed, assists with legal research and serves as a client contact point. Any who deal with Ms. Heffren will note her friendly and sincere demeanor that have their origin in her deep mid-western roots.

TONY MONTILLA

Lien Resolution Unit

Hearing Representative

Mr. Montilla handles a broad spectrum of work and finds that he most enjoys dealing with other people and has a talent for problem-solving and negotiating reasonable outcomes in disputes. He discovered the field of workers’ compensation while working for medical providers assisting with billing, collection calls, and filing court documents.

He began representing employers with the collection of liens before the WCAB. Mr. Montilla has over 20 years of experience in the workers' compensation field. In his career he has been a hearing representative for both lien claimants and defendants and has made board appearances, and conducted seminars for clients on the changing lien rules in the workers’ compensation system. He is responsible for attending Lien Conferences and Trials and negotiating liens. Under the direction of our skilled attorneys, he prepares Pre-Trial Conference Statements and Trials Briefs and assists with complex legal research.

Mr. Montilla is a smart, friendly, and gregarious person who is highly committed to excellence in producing complete, accurate, and thorough work. When off the job he is a devoted family man engaging in numerous outdoor and indoor activities with his wife, children, and relations, sparing a little time for the family dogs as well.

Administration

Director of Administration

Catherine M. Graham

Catherine M. Graham is responsible for managing the administrative operations of the firm, including supervising all non-attorney personnel, evaluating and managing the firm’s operating and information systems, overseeing the firm’s finance functions, marketing the firm’s legal services, and client development activities including on-site client seminars and attorney speaking engagements, and evaluating, managing and supervising the facilities of the Firm. Her management approach contributes to cost-effective and efficient operations which assist Shareholders to concentrate on their clients and cases. She has a Bachelor of Science Degree in Business Management with a concentration in Human Resouces Management from the University of Redlands. She is a member of the Association of Legal Administrators and the Society for Human Resource Management.

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Billing Coordinator

Audrea Anderson

Audrea Anderson is responsible for coordinating all billing activities including monitoring and adhering to client billing requirements, electronic billing processes, assisting with collections, and routine monthly invoicing. Audrea has been with our firm for over 30 years. Her knowledge of our firm history and long-lasting firm relationships is an asset to our firm.

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Legal Support

Our policies and procedures are based on efficiency and cost-effectiveness. Regular staff meetings are conducted for educational, informational, and “brainstorming” purposes. Our objectives are that our attorneys and staff are well informed, trained, and have the best tools available to produce a product that represents the client’s best interests and the firm’s goals.

Marilyn Burns

Legal Assistant

Lori Burrola

Legal Assistant,

Records Coordinator

Angelina Gomez

Legal Assistant,

Scheduler

Cynthia Gomez

Legal Assistant,

Scheduling Assistant

Pam White

Legal Assistant,

New Files Coordinator

Stella Castro

Legal Assistant to

Scott M. Tilley, Esq

Danielle Hampton

Paralegal & Legal Assistant to

Kellie Aden, Esq.

Teresa Madrigal

Paralegal & Legal Assistant to

Bruce A. Little, Esq.

Rima Petrossian

Legal Assistant to

Lien Resolution Unit

Margie Rivera

Legal Assistant to

Scott M. Tilley, Esq.

Rose Rivera

Legal Assistant to

Barry A. Saperstein, Esq.

Sandra Webb

Legal Assistant to

Geoffrey H. Spencer, Esq.

Isabel Cazares

Legal Department Assistant

Medical Records Clerk

Marnyce Jackson

Legal Department Assistant

Document Clerk

Savana Sanders

Legal Department Assistant

New Files, Document Management

Rachel Trees

Legal Department Assistant

Document Clerk

Retired

John F. Parker

Founding Member

Mr. Parker was born in Los Angeles, California and received his B.A. in 1950 from Loyola University of Los Angeles, his Juris Doctorate in 1953 from the University of California at Los Angeles, and his LL.D. in 1975 from Southwestern University, Phi Delta Phi. He was admitted to the California State Bar in 1953 and was a Certified Specialist, Workers’ Compensation Law, California Board of Legal Specialization.

He was president and an instructor of law at Southwestern University from 1969 through 1975 and a past member of The San Bernardino and Los Angeles County Bar Associations; American Bar Association; Eastern Bar Association of Los Angeles County; Chairman, Workers’ Compensation and Employers’ Liability Law Committee, Section of Torts & Insurance Practice, American Bar Association, 1988–1989; Workers’ Compensation Advisory Commission, Board of Legal Specialization, State Bar of California, 1983–1986. He was presiding workers’ compensation judge, San Bernardino, 1995–1997.

Mr. Parker founded the firm in 1964 and incorporated the firm in 1977. He served as president from 1977-1994 and retired January 31, 1994. He was inducted into the CAAA Inland Empire Hall of Fame in October of 2014 for his excellence in the field workers' compensation. Mr. Parker passed away on April 5, 2017.

Ross C. Irwin

Founding Member

Mr. Irwin was born in Hamilton, Ontario, Canada. Mr. Irwin received his B.A. in 1956 from Pasadena College, his Juris Doctorate from the University of Southern California in 1961, and his LL.D. from Point Loma Nazarene University in 1995. He was admitted to the State Bar of California in 1962, and is also admitted to practice before the United States Court of Appeals, Ninth Judicial Circuit and United States District Court, Southern District of California.

From 1962 to 1964, he was a deputy city attorney for the City of Los Angeles where he was assigned to the criminal division. His current memberships include The American Bar Association and the National Association of College and University Attorneys. He served as a judge pro tem for Pomona Municipal Court and Citrus Municipal Court and as an arbitrator, Los Angeles Superior Court. A former member of the Board of Trustees for Pasadena College (now Point Loma Nazarene University), he served as general counsel for the University as well as on the boards of various non-profit organizations.

Mr. Irwin practiced law with the Law Offices of Parker & Irwin from 1967-2017 and served as president of the firm from 1994-2000. He received an AV Preeminent Rating in the Martindale-Hubbell Attorney Directory. He was inducted into the CAAA Inland Empire Hall of Fame in October of 2018 for his excellence in the field workers' compensation.

Robert B. Hill

WCAB Judge - Riverside

Mr. Hill was born in Los Angeles, California and joined the firm in 1982. He received his B.A. in 1972 from the University of Southern California, his Juris Doctorate in 1977 from Loyola University of Los Angeles, and was admitted to the State Bar of California in 1977. He was admitted to practice before the United States District Court, Central District of California on December 5, 1979, and admitted to practice before the United States District Court of Appeals, 9th Circuit on April 3, 1985. Additionally, Mr. Hill was deputized judge pro tempore, Workers’ Compensation Appeals Board on December 6, 1984.

Mr. Hill served on the Workers’ Compensation Reform Advisory Committee of U.S. Representative (then-State Senator) Joseph Baca. He is a Certified Specialist, Workers’ Compensation Law, The State Bar of California Board of Legal Specialization and a frequent speaker and contributor to the Employers Group and the Council on Education in Management. He is a member of the State Bar of California, San Bernardino County Bar Association and was a member of the California Workers’ Compensation Defense Attorney’s Association.

Mr. Hill practiced law with the Law Offices of Parker & Irwin from 1982-2013 and served as President of the firm from 2000-2012 and retired form our firm in 2013. He was sworn as a Workers’ Compensation Judge for the Riverside Workers' Compensation Appeals Board on January 3, 2014.