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We admire your work. You are helping to transform the wine industry and our view of accountants.

Linda Reiff, Executive Director, Napa Valley Vintners

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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

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

Randy Gnagy has been a CPA for more than 35 years, having first joined BDCo in 2000. He is the firm's senior tax specialist, and has a great deal of experience in interstate taxation and tax preparation for nonprofit organizations. Over the years he has been active in Junior Achievement, the Arts Council of Napa Valley, the Napa Valley Shakespeare Festival, and has served on the board of Napa Emergency Women's Services and UpValley Family Centers of Napa County. He has also done volunteer work at local schools. An avid cyclist, he holds a BA in history from California State University, Fresno. Randy is a CPA licensed by the California Board of Accountancy.

Randy GnagyPain Reliever

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

Dawn Marshall is a Napa native. She briefly left the Napa Valley for a sojourn to Miami, Florida but returned to Napa to begin her professional career. Her first job was in a florist, before moving to high-end hospitality, then winery accounting and for the past 17 years she has been serving in a number of different roles in city government, culminating in the role of Human Resources and Administrative Manager. She is a two time recipient of “Award of Financial Reporting” by the Government Finance Officers Association. When she’s not helping “humans with resources”, she is likely to be gardening, quilting, or arranging items in her home to be more aesthetically pleasing. Dawn is the mother of 3 children – 2 sons and a daughter who all seem to have inherited some of her creative abilities. As a young woman, Dawn went off to purchase her first automobile, a Renault, at a local Napa automobile dealer. While she was unsuccessful in securing her dream automobile, she ultimately walked away with a first date with her now husband of 29 years.

Dawn MarshallTeam Harmonizer

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

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

Rebekah Kramer, CPA is a partner in Brotemarkle Davis & Co. specializing in assurance services and business consulting. She is originally from Napa, California and is a Justin-Sienna High School alumnus. She is a graduate of Concordia University, Irvine where she majored in Business Administration with a dual emphasis in Marketing and Accounting. She spent three years working for a Southern California accounting firm before returning to the Napa Valley. While she may not find many opportunities to apply her SoCal yacht-counting expertise (she once had to count yachts docked in ports from San Diego to Newport), her diverse audit skills honed from working with customers in Oil and Gas, Manufacturing, and Real Estate are a big plus. Rebekah first stretched her entrepreneurial muscles when she founded a chapter of co-ed business fraternity, Delta Sigma Pi, at Concordia. She hopes to apply what she learned not only to her role as an auditor but also to some day opening an animal shelter. When she is not busy auditing, you might find Rebekah exploring a new trail or revisiting one of her favorite national parks – Denali in Alaska. Rebekah is a CPA licensed by the California Board of Accountancy.

Rebekah KramerGoddess of GAAP

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

Chandra Englehart is a resident of Illinois and holds a degree from the University of Evansville (UE) and a Masters in Business Administration from the University of Southern Indiana. She has prior experience in both audit and tax and has held accounting roles in both private equity funds and banks. At one point, she even worked on a cemetery audit and was engaged in counting headstones. She is excited about applying her spirit-counting expertise in Wine Country and to helping people make sense of the numbers. She is an avid baseball fan and competitor, and as a former player on the NCAA Division 1 UE softball team, still holds the home run record. Her accolades don’t stop there as she was recognized as a 4 time all Academic player and at one point even held the record for getting “Hit by Pitch”. A mother of two young children, Chandra is inspired by her Mom, and is constantly looking for new ways to grow and learn. In 2025, she became a Certified Management Accountant(CMA) through the Institute of Management Accountants. Chandra is a CPA licensed by the Illinois Board of Examiners, and holds a CMA (Certified Management Accountant) license from the Institute of Management Accountants.

Chandra EnglehartPinch Hitter

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