Our Accounting Team

Over 50 years of Experience

Our team of certified accounting professionals works diligently and collaboratively to bring you individualized attention and effective, timely financial management solutions. At Filkins Group, we love what we do, which translates into positive client experiences. Schedule a consultation and see how you can benefit from working with us.


Tim Filkins, CPA


Tim Filkins is a Certified Public Accountant with over 35 years in the accounting industry. As Founder and President of the Filkins Group, a full-service tax and consulting CPA firm, Tim offers vast experience coupled with client dedication. Tim will actively listen to your needs and provide personalized solutions. His goal is to earn your full confidence and to become your trusted advisor.
Tim services Individuals (both active and retired) with an array of services ranging from tax planning, to income and estate planning, along with wealth building and transfer strategies. Tim has also served as a trusted business partner to many of his small to medium sized business clients.


Dean Rothenfluch, CPA


Dean has been working as a CPA for over 40 years. He has concentrated his practice on income tax matters involving small to medium sized business entities, trusts and estates, including income tax planning for individuals associated with those entities.
Dean earned his degree in accounting from the University of Portland. After working in public accounting for several years, he started his own accounting practice and ran that practice until last year (2018) when he joined Filkins Group. 
Dean and his wife Debbie have lived in the Portland area their entire lives. They have two children and 3 grandchildren who bring them more joy than imaginable. Traveling or vacationing with them, especially to Hawaii, is their favorite past time.


Darcy Wise, CPA


Darcy brings over 15 years of business experience to the Filkins Group.  She started her career in audit at Deloitte and then spent 10 years at Intel in the global accounting and financial services group, working extensively with tax, legal and information systems counterparts.
At the Filkins Group, Darcy specializes in preparing returns for private, closely-held businesses and their owners.
In her spare time, Darcy enjoys spending time with her husband, Brian, and cheering on the activities of their two children.


Zach Bergthold, CPA

Tax Manager

Zach is a CPA with 4 years in public accounting industry at Moss Adams where he had exposure to a variety of tax work, ranging from high net worth individuals to international corporations.  He worked across all industries, but had a strong footing in the real estate sector.  After this, he did a brief stint in private accounting at Nike, before finding the perfect balance with the Filkins Group.  At the Filkins Group, Zach now continues to serve a wide range of clients and projects, ranging from our rapidly developing trust and estate practice, to tax planning and compliance for small to medium sized businesses with their respective individual owners.  In his spare time, Zach is an avid tennis player and loves to compete.  He is highly involved in a local organization that pairs underserved youth with schooling and tennis in the Portland area.  He also loves exploring Oregon and discovering new hiking destinations.

matt headshot.jpg

Matt Fargo, MTax

Senior Tax Consultant

Prior to working at the Filkins Group, Matt worked for one of the largest insurance companies in the Northwest where he specialized in tax controversy and compliance. He offers extensive accounting and tax services with expertise in closely-held businesses, estates & trusts and financial planning for high-net-worth individuals.
Matt earned his bachelor’s degree in accounting and master’s degree in Taxation from Portland State University, and is a native of Portland, Oregon. In his free time Matt enjoys camping, hiking, and boating with his family.


Holly Bell

Operations & Marketing Coordinator

Holly brings over 10 years of retail management and customer service to the Filkins Group.  She has also been involved in several start-up small businesses and currently owns and operates two small businesses in the local area.
Holly also has more than three years-experience working in a CPA firm.  She has done everything from preparing and assembling tax returns, filing extensions and helping with general office efficiencies.
In her spare time, Holly loves to garden and create decorative plant combinations.  She also loves to spend time with her husband, Mike, drinking beer, cooking great food and having friends over to enjoy their outdoor Tiki Bar.


Robin Eichelberger

Operations & HR Manager

Robin has been working in client and customer services for over 15 years. She brings experience in team management and has knowledge of the complexities of small business start-up. Robin gets a thrill out of multitasking and the busy office life style keeps her motivated and entertained.
Robin earned her bachelor’s degree in English from the University of Idaho and is an Idaho native. With her fiancé Kyle and son Malachi, she spends her free time snowboarding on Mt. Hood or reading by the fire. She also loves partaking in the beer and restaurant scene in the greater Portland area.


Lynn Bell

Licensed Tax Preparer

Lynn is a Licensed Tax Preparer with over 7 years of work in Finances and customer service. She thrives on helping small business owners stay prepared and organized by offering her array of skills in bookkeeping, accounting, running financial reports and staying up with client communication.  She is also specialized in QuickBooks as a QuickBooks Certified Pro-Advisor.

Lynn earned her associate degree in accounting and continues to pursue her bachelor’s degree at Portland State University.

In her spare time, Lynn delights in adventuring through Oregon by hiking, visiting hard-to-get-to waterfalls, and relaxing at the beach, all with her fiancé Nathaniel and fur pup Izabelle.


Tami Rothenfluch

Tax Preparer & Bookkeeping Specialist

Tami has worked in the accounting industry for over 10 years.  She takes pride in the relationships she builds with her clients and personable service she provides them. 

Tami earned her bachelor of arts degree from the University of Oregon in 2008.  After graduating she traveled the world working and volunteering with human rights organizations.  After setting roots back in Portland she got married and has two children.