The Per Stirling Team
Meet our Exceptional Professionals
The Per Stirling team sets high standards of professionalism, combining deep and diverse industry acumen with a collaborative culture. Guided by unwavering fiduciary principles, we prioritize your best interests, delivering exceptional capital management strategies to address complex financial needs and support you in every stage of your financial journey.

Partners
John Per O’Sullivan
Managing Director, Partner
Robert Stirling Phipps
Director, Partner
Matthew J. Anderson, CFP®
Partner, Financial Advisor
Barton L. Couch, CFP®
Partner, Financial Advisor
Richard L. Hallum, Jr., CFP®
Partner, Financial Advisor
Kenneth Price, CFP®, CFA®, AEP®, CLU®, ChFC®
Partner, Financial Advisor
Ryan P. Joyce, CFP®, CPA
Partner, Financial Advisor
Management Team
John Per O’Sullivan
Managing Director, Partner
Robert Stirling Phipps
Director, Partner
Carol Sheffield
Chief Operations Officer
Amber Bell
Chief Compliance Officer
Katherine Zamora
Financial Advisor, OSJ Principal
Marita Iannuccilli
Comptroller
Alan Jacobs
Financial Operations Manager
Financial Advisors
Matthew J. Anderson, CFP®
Partner, Financial Advisor
Barton L. Couch, CFP®
Partner, Financial Advisor
Richard L. Hallum, Jr., CFP®
Partner, Financial Advisor
Ryan P. Joyce, CFP®, CPA
Partner, Financial Advisor
John Per O’Sullivan
Managing Director, Partner
Robert Stirling Phipps
Director, Partner
Kenneth Price, CFP®, CFA®, AEP®, CLU®, ChFC®
Partner, Financial Advisor
John Brem
Financial Advisor
Steve Cartwright, CFP®
Private Wealth Client Relationship Manager
Ronsey Chawla, MBA, CFP®
Financial Advisor
Galen T. Gabourel
Financial Advisor
Marty Katrein
Financial Advisor
Michael Katrein
Financial Advisor
Eric Lian
Financial Advisor
Michael A. Moore, CFP®
Financial Advisor
Tasha Rock, CFP®, CDFA®
Financial Advisor
Gay F. Thompson, CFP®
Financial Advisor
Nathan Trenholm
Financial Advisor
Deanna Williams, CFP®
Financial Advisor
Katherine Zamora
Financial Advisor, OSJ Principal
Staff & Support
Brad Borman
Operations Specialist
Alec Hallum, CFP®
Operations Specialist
Rachel Hurley, CFP®
Lead Operations Specialist, Community Initiative Coordinator
Noe Lopez
Operations Specialist
Sarah Nolte
Administrative Specialist
Taylor Peterson, CFP®
Compliance Specialist
Michelle Stair
Technology Specialist
Katherine Sung
Operations Specialist
Mason Vrazel
Operations Specialist
Kate Thomas
Administrative Specialist
Jocelyn White
Operations Specialist
Kim Ray
Community & Client Ambassador | Promoter
Start Building the Future You Want
Your financial future starts with the choices you make today. Whether you're building wealth, preparing for retirement, or protecting your legacy, we’re here to be your trusted partner, offering thoughtful strategies and unwavering support. Let’s navigate this journey together—one step at a time.
Who We Work With
We serve clients across the U.S. with personalized strategies aligned with their unique financial journeys.
Our Approach
Experience a client-centric process focused on financial flexibility and confidence, with strategies tailored to help you achieve what matters most.
Contact Us
Let’s start the conversation. Whether you have questions or are ready to take the next step, our team is here to support you with personalized service and fiduciary standards of care.