About Us
Guided by Values. Focused on You.
At Sullivan Family Financial, we believe that financial planning is about more than dollars and cents. It’s about helping people live with peace, purpose, and confidence. Whether you’re planning for retirement, building a legacy, or simply trying to make sense of your finances, our mission is to walk beside you with honest guidance, smart strategy, and unwavering support.
We’re here to simplify the complex, bring clarity to your goals, and create a plan that reflects not just where you are but where you want to go. Our approach is grounded in faith, family values, and a deep commitment to serving others with integrity. You’ll never be rushed. You’ll always be heard. And together, we’ll build something that lasts.
A Trusted Dave Ramsey SmartVestor Pro
Mike Sullivan is a proud Dave Ramsey SmartVestor Pro, which means he shares the same financial principles that have helped millions of individuals and families take control of their money, get out of debt, and build wealth with purpose.
As a SmartVestor Pro, Mike is held to a high standard of integrity, education, and client-first service. He doesn’t just agree with Dave Ramsey’s approach—he lives it and teaches it through one-on-one guidance and as a coordinator of Financial Peace University.
Working with Mike means you’ll get straight talk, not sales pitches. You’ll be equipped with the tools and knowledge to make confident financial decisions, all based on biblical wisdom and time-tested strategies. Whether you’re investing for the future, creating a budget, or planning your legacy, Mike is here to help you stay on track and reach your goals.

MEET THE FAMILY
Mike Sullivan
Founder of Sullivan Family Financial
Mike Sullivan has always believed in doing things the right way, even when no one is watching. It’s a principle he carried through two decades of military service, through his business education, and into the heart of his financial planning practice. It’s also the reason so many clients trust him, not just with their finances but with their future.
After retiring from a 20-year career in the U.S. military, Mike earned his degree in Business Management with a focus in Finance from Eckerd College, in St. Petersburg, FL. He is currently pursuing his Master’s Degree in Financial Planning from Golden Gate University in San Francisco, CA. Mike then began serving individuals, families, and business owners as a financial advisor, helping them set clear financial and retirement goals, make tax-smart decisions, and create tailored financial plans that support long-term success. Over time, he discovered that what people really needed was someone they could count on—someone who would listen, simplify, and guide without pressure or pretense.
A man of Christian faith, family, and Irish heritage, Mike has been a follower of Jesus since 2005, after experiencing a radical encounter that forever changed the direction of his life. He is happily married to his wife, Bethany, for over 15 years, and together they have one adult son, Kevin. Originally from New England (Massachusetts and New Hampshire), Mike is also a diehard Boston sports fan. As the oldest—and, in his words, the “best looking”—of five siblings (Cory, Colleen, Caitlin, and Kellie), he dreams of making Sullivan Family Financial truly live up to its name by bringing family into the work. And yes, Cory, if you’re reading this, you’re first in the shoot—we’ve got a warm seat waiting for you.
Mike founded Sullivan Family Financial to offer a personal, principled approach to planning. He is also a proud coordinator of Dave Ramsey’s Financial Peace University, helping others apply timeless biblical financial wisdom in real life. Clients often describe working with Mike as the moment they finally felt “organized” and “in control.”
When he’s not meeting with clients, Mike enjoys traveling the world with his wife, catching live music or a ballgame, and cruising around Dunedin on their golf cart with their two Cavalier King Charles Spaniels, Dublin and London Jack.
At Sullivan Family Financial, Mike brings his whole heart and his whole story to every plan. Because to him, financial peace isn’t just a concept. It’s a calling.

Mike may be a numbers guy stemming from his days as a Math-lete in high school, but he doesn’t take himself too seriously. In fact, it’s not uncommon for clients to walk into a financial review and leave laughing.
He’s been known to joke that when asked, “What’s the quickest way to double your money?” his answer is, “Fold it and put it back in your pocket.”
That warm sense of humor, paired with his genuine care for others, is what turns financial meetings into meaningful conversations.
Diana Jansen
Diana Jansen brings years of experience in the financial services industry, along with a genuine passion for helping others succeed. As a licensed financial professional holding her Series 6, 63, 66, and 7 licenses, she has worked with individuals, families, and business owners to support their investment, retirement, and insurance planning needs.
Throughout her career, Diana has been part of respected firms such as NYLIFE Securities, Eagle Strategies, and JP Morgan Chase, where she managed client relationships and financial portfolios with care and attention. As a partner at High Point Financial Group, she built a reputation for being both knowledgeable and approachable, earning recognition through honors like Million Dollar Round Table, Executive Council, and Diamond Elite.
Today, Diana has chosen to step into a more supportive role, using her experience behind the scenes to help advisors grow and better serve their clients. She takes pride in being a steady, reliable resource, helping create thoughtful strategies and delivering a high level of service that reflects the values of Sullivan Family Financial.

Outside of work, Diana enjoys staying active and making the most of time outdoors. You can often find her hiking, paddleboarding, golfing, or playing pickleball. She also loves country dancing and spending time with her two grown children whenever she can.
Her commitment to health, balance, and faith carries through into everything she does, and she is grateful to be part of a Christian-based firm that shares her heart for serving others.
