Meet The Team

David Duston

Certified Financial Fiduciary® • Safe Money Strategist

David is passionate about helping people of all ages learn how money works. Clients benefit from his safety-first strategies to mitigate capital gains, defer or even eliminate taxes during market gains, provide lifetime income, and protect nest eggs when markets underperform or even collapse. A proud Texan-By-Choice, David and the MoneyWorks Group serve Texas, Oklahoma, and many other states. He gladly shares his knowledge to make business and personal goals a reality.

Dee Mauldin

Retirement Strategist

With decades in business leadership and supplemental insurance, Dee brings a practical, results-driven approach to retirement planning—simplifying complex concepts and focusing on protecting savings, maximizing income, and creating lasting legacies. At MoneyWorks Group he helps clients “Reinvent Their Tomorrow.” Outside of work, he enjoys fishing, baseball, and time with his wife, Mary.

Tiffany Thien, MBA, EA

Tax Strategy & Compliance

Tiffany has 20+ years in tax management, staff development, technical research, and client relations—including leadership roles at Big Four and middle-market firms in Dallas. She excels in individual, small-business, and state & local tax compliance— delivering clear, effective tax planning and preparation.

Christian Turullols

Financial Professional • USMC Veteran

A U.S. Marine Corps veteran, Christian brings discipline and client-first commitment to planning. He helps protect assets, secure retirement income, and care for loved ones across good times and adversity—building personalized strategies so you can enjoy retirement on your terms.

Josh Karasow

Certified Financial Fiduciary® • NSSA®

Since 2001, Josh has helped retirees and pre-retirees build plans focused on market-loss protection, tax reduction, guaranteed lifetime income, Social Security maximization, and fee avoidance. He’s a member of the Ed Slott Advisory Group, a Certified Financial Fiduciary®, and a National Social Security Advisor.

Heather Schreiber

Advanced Planning Consultant

Heather builds customized solutions and advanced strategies in clear, actionable terms. A passionate consumer advocate, she educates financial, legal, and tax professionals—and the consumers they serve—to navigate retirement with confidence.

Rachel Root

New Business & Contracting

Rachel processes new business applications and contracting, coordinating transfers with carriers to minimize delays and keep policies moving on time. She supports a seamless experience so clients always know where things stand.

Kathy Martin, PhD

Content & Communication Strategy

Kathy specializes in communication dynamics for the financial industry, with 25+ years in corporate training and content creation. She tailors messaging to generational and personality-driven styles to drive clarity and engagement.

Tusi Duston

Media • Audio & Video

Tusi supports audio/video production and editing for MoneyWorks. A graduate of Wakeland HS and future UNT student, he’s also a top soccer referee in North Texas—bringing energy and teamwork to every project.

Sebi Duston

First VP, In Charge of Mischief

Sebi is constantly learning more about “How Money Works” and aims to earn a smile from everyone he meets—bringing heart and curiosity to the MoneyWorks team.