Team

COMMITTED TO YOUR SUCCESS

A collaborative team with deep roots and broad experience

We take great pride in the relationships we have built with our clients, and the collaborative plans we put in place to help them achieve their wealth planning goals, including sending children and grandchildren to college, traveling the world, giving back to their community and passing their legacy on to the next generation.

David A. Feller, CFP, CIMA

Managing Director - Investments
Private Wealth Financial Advisor

Call me
Email me

View David A. Feller's Bio

David A. Feller

, CFP, CIMA

David Feller has spent over 30 years helping a select group of families manage their investment portfolios with care, insight, and a long-term perspective. His approach centers on addressing each client’s unique financial concerns through the development of personalized strategies in Investment Planning, Asset Allocation, and Risk Management.

David’s comprehensive investment guidance includes:

Estate investment planning strategies
Retirement income analysis
Tax-efficient investment strategies
Employee stock option analysis
Private money management services
Education savings planning
He works closely with clients to build diversified, risk-appropriate portfolios using a mix of stocks, bonds, and cash alternatives as core investment vehicles.

David holds a Bachelor of Science degree from the University of Michigan and has earned the CERTIFIED FINANCIAL PLANNER^® certification, as well as the Certified Investment Management Analyst^® (CIMA^®) designation. The CIMA^® program is an advanced investment consulting certification sponsored by the Investment Management Consultants Association and delivered in partnership with The Wharton School at the University of Pennsylvania.

David has been recognized by Forbes as one of the Best-In-State Wealth Advisors for seven consecutive years: 2019 through 2025¹, a testament to his commitment to excellence and client service.

Beyond his professional work, David is deeply engaged in his community. He currently serves on the Executive Board of the Kirkland Performance Center, where he also chairs the Investment Committee. He remains active with his alma mater through the University of Michigan Seattle Campaign Council and the LS&A Dean’s Advisory Council. His past civic involvement includes serving on the Board of the Cascadia Community College Foundation, chairing the Yarrow Point Planning Commission, and serving as a Council Member for the Town of Yarrow Point.

Certified Financial Planner Board of Standards, Inc. owns the certification marks CFP^®, CERTIFIED FINANCIAL PLANNER^®, and the federally registered CFP® (with flame logo), which it awards to individuals who successfully complete initial and ongoing certification requirements.

Wells Fargo Advisors is not a legal or tax advisor.

¹2025 Forbes Best-In-State Wealth Advisors; Awarded April 2025; Data compiled by SHOOK Research LLC based on the time period from 6/30/23- 6/30/24 (Source: Forbes.com). 2024 Forbes Best-In-State Wealth Advisors; Awarded April 2024; Data compiled by SHOOK Research LLC based on the time period from 6/30/22 - 6/30/23. 2023 Forbes Best-In-State Wealth Advisors: Awarded April 2023; Data compiled by SHOOK Research LLC based on the time period from 6/30/21 - 6/30/22 . 2022 Forbes Best-In-State Wealth Advisors: Awarded April 2022; Data compiled by SHOOK Research LLC based on the time period from 6/30/20 - 6/30/21. 2021 Forbes Best-In-State Wealth Advisors: Awarded February 2021; Data compiled by SHOOK Research LLC based on the time period from 6/30/19 - 6/30/20. 2020 Forbes Best-In-State Wealth Advisors: Awarded January 2020; Data compiled by SHOOK Research LLC based on the time period from 6/30/18 - 6/30/19. 2019 Forbes Best-In-State Wealth Advisors: Awarded February 2019; Data compiled by SHOOK Research LLC based on the time period from 6/30/17 - 6/30/18. View additional disclosures

Managing Director - Investments
Private Wealth Financial Advisor

david.feller@wfadvisors.com

(425) 450-2244

https://www.linkedin.com/in/david-feller-cfp%C2%AE-cima%C2%AE-0469717/

CFP, CIMA

Debra Styner

Private Wealth Senior Registered Client Associate

Call me
Email me

View Debra Styner's Bio

Debra Styner

Debra Styner brings over 30 years of experience in the financial services industry, beginning her career at Sun Life of Canada, followed by A.G. Edwards & Sons, and now serves as a 2025 Wells Fargo Advisors Platinum Client Associate.

In her role, Deb ensures that clients’ administrative, trading, and operational needs are handled with accuracy and efficiency. Her responsibilities include:

Opening new accounts
Updating account information
Managing account and estate transfers
Responding to inquiries about statements and account activity

Deb is known for her attention to detail and her commitment to making every client interaction seamless and supportive.

What Deb values most in her role is the opportunity to build meaningful relationships with clients. She enjoys hearing about their families, sharing in their life stories and adventures, and learning what brings them joy. These are experiences that enrich her work and life.

The Wells Fargo Advisors Platinum Client Associate recognition is held by a select group of client associates within Wells Fargo Advisors as measured by their success in achieving exceptional performance the previous calendar year. Performance factors are inclusive of client experience, partnership with Financial Advisors to support their objectives, and task execution.

Private Wealth Senior Registered Client Associate

debra.styner@wfadvisors.com

(425) 450-2256

Brett Costanzo

Private Wealth Financial Consultant

Call me
Email me

View Brett Costanzo's Bio

Brett Costanzo

Brett joined our team in March 2019, bringing more than a decade of experience in banking and mortgage services. A graduate of Washington State University, he has built a well-rounded career in financial services, holding a variety of roles that have shaped his broad expertise and strong client-first approach.

In his current role as Financial Consultant, Brett focuses on supporting the complex financial needs of our clients. Known for his eagerness to learn and commitment to service, he plays a key role in helping individuals and families navigate their financial journeys with confidence and clarity.

Outside the office, Brett enjoys spending time with his wife, Rae, and their three boys, Jackson, Everett, and Max. They reside in Auburn, WA, where they make the most of their time traveling, tackling home renovation projects, and cheering on the kids at their sporting events.

A passionate fishing enthusiast, Brett values taking time to slow down and enjoy the moment. He’s also a fan of nearly every sport and has enjoyed coaching his son’s basketball team the last few seasons. Outside of the arena, he has developed a growing interest in home gardening and is open to tips from fellow green thumbs.

Private Wealth Financial Consultant

brett.costanzo@wfadvisors.com

(425) 450-2241

Aengus Dubendorf

Private Wealth Registered Client Associate

Call me
Email me

View Aengus Dubendorf 's Bio

Aengus Dubendorf

Aengus Dubendorf began his career with Wells Fargo Advisors in November 2022 after graduating from Washington State University. Along with his degree in Finance, he brought a strong foundation in equity research, having served as an Investment Analyst for the WSU Investment Fund, where he gained hands-on experience evaluating stocks and market trends.

In his role as a Private Wealth Registered Client Associate, Aengus serves as a vital resource for both clients and advisors, ensuring seamless operations and delivering an exceptional client experience.

His responsibilities encompass a wide range of critical functions, including:

Maintaining and updating client account information
Managing secure online access for clients
Coordinating money movement transactions and wire transfers
Supporting compliance oversight and adherence to regulatory standards
Executing trades for clients

Aengus is committed to delivering precise, timely service while cultivating meaningful client relationships and driving operational excellence. His dedication to quality ensures a seamless and dependable experience at every point of contact. In addition to his current responsibilities, Aengus is actively pursuing further professional development and has begun the process of obtaining his insurance licensing to expand his expertise and better serve clients.

Beyond his professional role, Aengus is passionate about outdoor adventures. He enjoys skiing, surfing, and backpacking, and often spends quality time with his family on Whidbey Island.

Private Wealth Registered Client Associate

aengus.dubendorf@wfadvisors.com

(425) 450-2221

Siripond Siriwandee

Senior Registered Client Associate

Call me
Email me

View Siripond Siriwandee 's Bio

Siripond Siriwandee

Siri is a dedicated team member with a strong academic foundation and a passion for client service. She earned her bachelor’s degree from Eastern Washington University and an MBA from West Texas A&M University, reflecting her commitment to continuous learning. Her career began at Wells Fargo in 2016 as a Personal Banker, where she developed an interest in wealth management. This led her to transition to Wells Fargo Advisors, where she now focuses on client account maintenance, ensuring updates, documentation, and service requests are handled efficiently to support clients in their financial journey.

Outside of work, Siri has been embracing new adventures. This year, she started playing pickleball with friends, turning casual games into a rewarding learning experience thanks to the generosity of local coaches. With the rainy season upon us, she’s exploring indoor pickleball courts to keep the fun going. Siri also plans to introduce her husband, Dan, to razor clam digging as the clamming season kicks off, a perfect way to enjoy the Pacific Northwest outdoors.

Senior Registered Client Associate

siripond.siriwandee@wfadvisors.com

(425) 450-2239

Contact Me

Email Address

Find Me On

About Me

View advisor page

We listen carefully to understand your goals and make sure you have the right information to help make informed decisions.

Email Us

Investment and Insurance Products are:

Not Insured by FDIC or any Federal Government Agency

Not a Deposit or Other Obligation of, or Guaranteed by, the Bank or Any Bank Affiliate

Subject to Investment Risks, Including Possible Loss of the Principal Amount Invested