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.
Defense Attorneys
Please click on the attorney's photograph for more information.
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Kim S. Ngy
Paralegal Specialist
to Scott M. Tilley, Esq.
Reginald Brunner II
Paralegal​
Lisa Heffran
Paralegal, Director
Lien Resolution Unit
Tony Montilla
Hearing Representative
Lien Resolution Unit
Administration
Catherine M. Graham
Director of Administration
Catherine M. Graham is responsible for managing the firm's administrative operations, including supervising all non-attorney personnel, evaluating and managing the firm’s operating and information systems, overseeing the firm’s finance functions, marketing and client development activities, and facilities. Her management approach contributes to cost-effective, efficient operations, which help Shareholders focus on their clients and cases. She has a Bachelor of Science Degree in Business Management with a concentration in Human Resources Management from the University of Redlands. She is a member of the Association of Legal Administrators and the Society for Human Resource Management.
Laila Metz
Executive Assistant
Laila Metz is the Executive Assistant to the Director of Administration, providing high-level administrative, organizational, and strategic support. She maximizes executive productivity by managing complex tasks, logistics, correspondence, and coordination while ensuring efficient business operations.
Audrea Anderson
Billing Coordinator
Audrea Anderson is responsible for coordinating all billing activities including monitoring and adhering to client 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. ​​​​​​​​​​​​​​​
Madisen Tilley
Marketing Coordinator
Madisen Tilley is the Marketing Coordinator for the firm, assisting with the planning of firm client events, conferences, and seminars.
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Please feel free to reach out to her if she can assist you or answer any questions you may have about our firm and how we can defend your workers' compensation claims.
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.
​Angelina Gomez
Legal Assistant,
Scheduler for Scott M. Tilley, Esq & Geoffrey H. Spencer, Esq.
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​Elaine Samano
Legal Assistant,
Scheduler for Bruce A. Little, Esq. &
Barry A. Saperstein, Esq.
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​Pam White
​Legal Assistant,
New Files Coordinator
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Abigail Armendariz
​Legal Assistant,
New Files Coordinator
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​​​​​Rima Petrossian
​Legal Assistant to
Lien Resolution Unit
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​Lori Burrola
​Legal Assistant to
Ryan T. King, Esq.​
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Marilyn Burns
​Legal Assistant to
Kellie Aden, Esq.
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Stella Castro
Legal Assistant to
Scott M. Tilley, Esq
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Deneice Chaparro-Gonzales
Legal Assistant to
Barry A. Saperstein, Esq.
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Teresa Madrigal
Paralegal & Legal Assistant to
Bruce A. Little, Esq.
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Gloria Pacheco
Legal Assistant to
Queen K. Obi, Esq.
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Margie Rivera
Legal Assistant to
Scott M. Tilley, Esq.
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Rose Rivera
​Legal Assistant to
Barry A. Saperstein, Esq.​
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Sandra Webb
​Legal Assistant to
Geoffrey H. Spencer, Esq.​
​Marnyce Jackson
Legal Department Assistant II
Document Specialist
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​Britt Anderson
Legal Department Assistant I
Document Specialist
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Isabel Cazares
Legal Department Assistant I
Medical Records
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Nick Metz​
Legal Department Assistant I
Document Specialist
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​Arianna Inman
Department Specialist​
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Mary Peterson
Records Coordinator
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Lauren Valdez
Service Clerk
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Wendi White
Service Clerk​
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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.
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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.
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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.