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The biggest benefit I have observed is that our management staff is now on the same page and working toward clear, concise goals with a team mentality. They are highly motivated because they can actually measure and see the results of their hard work. I now have more confidence in my staff to understand and take...

Rob Sinskey of Robert Sinskey Vineyards

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Geni Whitehouse is a consulting team member with BDCo. She is the author of How to Make a Boring Subject Interesting: 52 ways even a nerd can be heard, which is available on Amazon.com. Geni has been named one of the 25 most powerful women in accounting by CPA Practice Advisor, one of the Top 100 Influencers by Accounting Today magazine, and one of the Top 25 Thoughtleaders in Accounting. Her primary area of focus is expanding BDCo's strategic management services. Geni is an instructor at the WISE Academy,where she teaches accounting concepts to winery staff and is a former board member of the Napa/Sonoma Chapter of Women for WineSense where she served as Education Director. She was a member of TEDxNapaValley.org and spoke at their event in September of 2011. You can read Geni's blog posts here. Geni is a CPA licensed by the Georgia State Board of Accountancy.

Geni WhitehouseCountess of Communication

A graduate of North Dakota State University, Summer majored in accounting and minored in fraud investigation, finding her way to the field of accounting almost by accident. Initially planning a career in law enforcement, everything changed when she took her first accounting class and discovered a new passion. Specializing in Individual and Business Tax, Summer is committed to finding tailored solutions for her clients through thoughtful communication. She firmly believes that a one-size-fits-all approach doesn’t work and takes pride in building strong client relationships to address unique needs. Outside of work, Summer is an avid traveler and finds joy in exploring new places and cultures. A proud animé enthusiast, she admires the profound teachings and life lessons delivered by its characters. Her hobbies also include Pokémon, reading (especially Stephen King novels), and spending time with her growing family. Summer cherishes the years she spent living in the beautiful country of Bahrain, which enriched her love for different cultures and experiences. Summer is a CPA licensed by the Montana Board of Public Accountants.

Summer ZitoAnimated Taxster

Heather Sprauve is a native of Deer Park, California. She attended Pacific Union College (PUC) in Angwin, then transferred to their sister college, Atlantic Union College in South Lancaster, Massachusetts, before returning to Angwin to complete her degree. She started out as an art major but after taking her first business class, discovered an aptitude for accounting and made that her major. Heather moved to the Virgin Islands where she married and spent 18 years working for an accounting firm. She worked for BDCo part-time for a few years and then following the devastating impact of hurricanes Irma and Maria, returned to California. While she enjoys being back in California, Heather misses her daily view of the Caribbean Ocean from almost any spot on the 31 square mile island of St. Thomas. Her interests include hiking, traveling and exploring new places.

Heather SprauveGlobal Gallivanter

Craig Underhill is the firm's CEO. He has been a CPA for over 37 years and has been with BDCo since 1995. Leveraging his vast accounting and management expertise, he's adept at steering wine and hospitality entities towards strategic success. His education in strategic management, productivity, and human behavior empowers individuals across all levels—from top executives to hourly staff—to reach their peak. A master at inciting introspective questions, Craig enables individuals to unlock their potential and bolster performance. He is the board chair for Junior Achievement in Napa County and has led JA's expansion from 250 participants to over 4,000 annually. He holds a business administration degree from California State University, Chico and is certified in Strategic Performance Management. He is an active volunteer and trained handler for Aaron the Comfort Dog, a Napa celebrity. You can read Craig's blog posts here and hear him describe his vision for the firm here. Craig is a CPA licensed by the California Board of Accountancy.

Craig UnderhillEmperor of Enlightenment, CEO

Guy Carl has been a CPA with BDCo since 1992 and a partner since 2005. He specializes in helping small wineries with tax preparation and planning, financial statements, forecasting, and accounting software guidance. Guy enjoys helping business owners understand how their businesses work and perform, and empowering them to be more successful. Born and raised in the Napa Valley, Guy holds an accounting degree from St. Mary's College. He is a past-active member of the Napa Active 20-30 Club, an organization dedicated to helping children in the community. An avid outdoorsman, Guy can often be found alongside a mountain stream or floating on a lake with a fishing pole nearby. Guy is a CPA licensed by the California Board of Accountancy.

Guy CarlProfit Prophet, CFO

From managing restaurants to mastering tax strategies, Adam Kern has charted a unique path to becoming an accounting professional. Armed with a Bachelor of Science in Business Management from the University of Nevada-Reno and Enrolled Agent certification, Adam specializes in unraveling the complexities of tax law. After working more than 5 years in a local firm where Adam annually assisted individuals, trusts, and businesses with their taxes, he transitioned into the role of mentor to his team members. Adam takes pride in training the next generation of preparers, blending technical expertise with practical guidance. Outside the office, Adam applies his love for adventure in hiking and exploring the scenic trails of Tahoe. Nicknamed the "Tax Trekker," Adam thrives on solving intricate problems and leading clients confidently through their financial journeys.

Adam KernTax Trekker

Jake Thomas has a unique background which combines advanced studies in Physics and WSET Level 3 certifications in Wine & Spirits. He has taught physics classes at Stanford and created more than 500 custom cocktails at high end resorts in the Bay Area. Whether he finds himself behind a desk, in front of a classroom, or working the bar, Jake is motivated by the impact he is able to have on others. Jake is a life-long learner who looks for new ways to stretch beyond his comfort zone. We are grateful to have access to his curiosity, knowledge, and mixology magic as a member of the firm’s administrative team. When he has time outside of work and is not busy researching Quantum Field Theory, Quantum Electrodynamics, Chaos Theory or mixing whiskey cocktails, Jake is fond of trips to Canada for back country snowboarding.

Jake ThomasIrrational Number Nerd

Diane Leenders is a graduate of Saint Mary's College in Moraga, California. She is an experienced tax professional who has previously held audit positions in both public accounting and industry. Diane is an open water swimmer who regularly competes, along with members of her family, in masters swimming events. She enjoys the feeling of gliding through the waves and the resulting sense of calm. Water is a recurring theme in her life, as she met her husband on a water skiing adventure. Diane is an early riser and her daily ritual begins with coffee and a view of the rising sun. Diane cherishes this time alone and feels that "each day provides an opportunity to make that day meaningful." Diane is a CPA, licensed by the California Board of Accountancy.

Diane LeendersIlluminator

Erica Umphreyville has always been surrounded by numbers and accountants—from her parents to her siblings—but her true passion lies in making a meaningful impact on her community and for her clients. A graduate of Southern Methodist University in Dallas, Texas, Erica holds a Master of Science in Accounting. She honed her expertise at a Big 4 CPA firm, focusing on the governmental and non-profit sectors, and more recently served as a Controller, overseeing the financial operations of 24 Title I charter schools. Erica’s deep connection to her work is inspired by the powerful women in her life, especially her mother, who rose from an Accounts Payable Manager to a Director of Finance in the Biotech industry, embodying the hard work and dedication that Erica values. Though based in Texas, Erica is excited to work with wineries, leveraging her unique blend of analytical prowess and creative problem-solving to unravel complex accounting challenges and help clients achieve their goals. When she’s not delving into data or strategizing with clients, you might find Erica appreciating nature, whether it’s walking on a trail near her apartment or engaging in a competitive game of pickleball. She also enjoys exploring her culinary side, cooking Italian food, and growing her own herb and vegetable garden. Erica is a CPA, licensed by the Texas State Board of Public Accountancy

Erica UmphreyvilleAltruistic Auditor

Known as 'The Nordic Decoder' for his heritage and talent for simplifying complex systems, Daigen Afdahl brings technical expertise and personal insight to the BDCo team as Tax Manager. With roots on a Wisconsin dairy farm and a passion for uncovering the stories behind numbers, he specializes in helping businesses and individuals navigate tax code sections while leveraging data to support informed decision-making. Daigen earned his Bachelor of Science in Business Administration and Master of Professional Accountancy from Montana State University in Bozeman, where he honed his problem-solving skills and practical expertise. He gained hands-on experience as a volunteer preparing tax returns for residents of remote Alaskan villages, followed by advancing roles in public accounting, where he developed extensive skills in tax return preparation, staff management, and strategic financial planning. Beyond the office, Daigen’s creativity extends to the kitchen, where he crafts gluten-free and dairy-free meals inspired by a recent lifestyle change. A lifelong learner and problem solver, he thrives on helping clients optimize their tax strategies, tackle operational challenges, and achieve their business goals in complex industries.

Daigen AfdahlNordic Decoder

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Napa, CA 94559

Phone  :  707-963-4466
FAX  :  707-266-1673
email  :  info@bdcocpa.com

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