Our Story
Originally called The Tax Man, Ken Oase’s business received a major boost 30 years ago when the Tucson Citizen sent an undercover reporter to have the same tax return prepared by Ken and by three other accountants. The results were published in an article titled “Nothing’s Certain Except Death, Not Even Taxes.” The story revealed strikingly different outcomes. The other preparers not only calculated the taxes owed incorrectly, but they also charged significantly higher fees.
When David Oase was 16, he received his first computer—an IBM Datamaster, that arrived long before personal computers were common. It was used exclusively for preparing tax returns back then. During summer breaks he helped his father’s accounting business by writing an entirely new bookkeeping program for the Datamaster. David continued working alongside Ken until Ken’s passing in 2016.
David Oase
CPA, owner
David is an army brat who living in Tucson in 1st and 2nd grade before moving to Tennessee. He returned in 1985 and graduated from the University of Arizona. He became a CPA in 1993 just after joining the firm. In his spare time he like to visit caves all over the country. He paints miniatures and crafts terrain for the "kids" Dungeons and Dragon type games. He has also filmed over 100 sermons and cave events.
Chad Denson
From the picturesque hills of Vail, Colorado, Chad has traded in his cowboy boots for balance sheets, but he never left his adventurous spirit behind! A proud graduate of the University of Arizona with a degree in accounting, Chad brings a unique flair to the numbers game.
Growing up, he was a performance quarter horse rider, hitting the trails by day and carving up the slopes on weekends. When he wasn’t skiing or working as a river guide on the mighty Colorado River, you could find him four-wheeling through mining roads with family and friends in his trusty Land Cruiser.
Now in Tucson, Chad pours his heart into community service as a dynamic leader with Rotary International and has made his mark on several boards, including the Arivaca Internet Utility Cooperative and the Tucson LGBT Chamber of Commerce.
When he's not crunching numbers, you’ll find him cheering for his beloved Arizona Wildcats, enjoying the company of his loyal German Shepherds—who sometimes join him at the office—or supporting his son’s martial arts journey. Chad loves camping, restoring his classic Land Cruiser, and exploring the world with his partner, proving that even accountants can have thrilling adventures!
Angelica Chavez
Senior Accountant and licensed Enrolled Agent who specializes in individual and business taxation. She’s built a reputation for navigating complex tax situations with clarity and calm—whether she’s sorting out financial knots or decoding the latest changes in tax law. Angelica thrives in a collaborative environment and is known for being a reliable team player who’s always eager to learn, share knowledge, and support her colleagues. She has a knack for making accounting feel a little less intimidating for both her teammates and her clients.
When she’s off the clock, Angelica is a proud mom of two, an amateur painter, a devoted stargazer, and a committed gamer. She also has a deep love for caffeine, which definitely comes in handy during tax season.
Lucy Acedo
Office Manager
Lucy is the first person you'll meet at our office, and she makes everyone feel right at home. Born in California, she’s a Hello Kitty lover with a passion for hiking, traveling, and working out. She’s also a proud plant mom and deeply values time with her family. Whether she’s organizing the office or sharing her latest adventure, Lucy brings warmth and energy to everything she does.
Mae Mendoza-Pacia
Mae Mendoza-Pacia is a proud Tarlac State University graduate from Tarlac City. She always brings focus, creativity, and passion to all her work. She’s fueled daily by her love for coffee and finds balance in simple joys.
At home, Mae unwinds with her three dogs—especially her sassy shih tzu, Chica—and she also enjoys puzzles, diamond painting, and number art.
She is a fan of crime documentaries, and she loves music and singing. Mae also relaxes herself with farming and restaurant simulation games on her Nintendo Switch or phone during her free time.
For Mae, weekends are always reserved for family time, where shared meals and laughter help her recharge.
Jean Olanio
Jean is a 2018 Accountancy graduate from Saint Louis University in Baguio City. She is always consistent in delivering the most accurate, thoughtful financial insights with a blend of precision and creativity.
Outside work, she’s surrounded by her beloved dogs and cats, and each of them has its own personality as unique as their names—from Guardian and Loki to Theo and Summer.
She much enjoys road trips with her husband—Kram, playing volleyball or badminton, diving into mobile games, and also binge-watching Korean dramas during her spare time. As a dedicated foodie, she keeps on trying out new restaurants around her, which is her favorite stress-relieving activity.
Jean expresses her artistic side through nail art and contributes her musical talent as a vocalist and choir member. Her motto in life? It’s “work hard, play harder, and prioritize what brings joy.”
Vanessa Olivarria
Vanessa is a seasoned Client Excellence Coordinator with over a decade of experience in sales and team management. Born in Tucson, she has already built a career around leading teams, improving efficiency, and supporting work-life balance.
Beyond work, she enjoys weightlifting and caring for her growing wide collection of plants—from succulents to orchids. She also loves Arizona’s lakes for kayaking and paddleboarding and spends downtime learning skills like sewing.
Family is the very core for Vanessa, as she shares close bonds with her nieces and nephews and often joins them for camping and outdoor adventures most of the time. And her loyal cat—Kitty, has been with her for more than five years now.
As she’s always focused on growth and improvement, Vanessa always bring energy, dedication, and the love for learning to both her professional and personal life
Kram Monang
Kramned Charles Monang—known simply as Kram—is a dedicated bookkeeper with a Bachelor of Science in Financial Management from Saint Louis University. He thrives on precision, structure, and the challenge of navigating complex financial situations. Kram takes pride in helping clients find clarity and confidence in their financial records.
Outside of work, Kram lives an adventurous, hands-on lifestyle. He’s passionate about basketball, camping and outdoor activities. A proud pet parent to a lively pack of dogs, he enjoys long walks with them and spontaneous road trips—especially with his favorite travel companion. One of his most memorable trips was an 8-hour drive to Ilocos Norte to enjoy its white sandy beaches.
In his free time, Kram also practices welding and carpentry, further reflecting his love for building and fixing things—whether it’s in spreadsheets or real life.
Bryan Valdez
Bryan began his career after completing his degree in Advertising and Public Relations, and has already built an 18-year career across marketing, graphic design, sales, business development, customer service, and leadership.
Currently handling the marketing efforts of the company, he enjoys combining strategies and creativity to develop meaningful, effective, and human-centered ideas
Powered by black coffee and espresso, Bryan stays inspired through catching up on latest news, documentaries, and articles about history and astronomy. While classical music—from Mozart to Tchaikovsky—fuels his inspiration and creativity, and with his calm, blue-loving personality meets adventure through travel and cultural explorations. For Bryan, every new experience is an opportunity to learn, grow, and see the world differently