Our Team

Douglas S. Drelich

Doug Drelich has been working in the financial services arena in Jacksonville, Florida, for more than 20 years. He founded D.S. Drelich & Associates in 2001 to provide retirement services and legacy planning to all levels of wealth and income. Prior to Doug's entry into the world of finance, he helped launch a national hotel chain. Doug is a graduate of Cornell University and sits on several boards of directors in the Jacksonville area.



In his free time, Doug enjoys traveling with his family. Their adventures have included Hawaii, Alaska, Europe, and annual summer vacations in Vermont. His hobbies also include powder skiing, golf and tennis. Doug and his wife, Mercy, and their two children have lived in Jacksonville for more than 25 years and have attended New Life Christian Fellowship since 1986.

President & Founder*

Tyler Sullivan

Tyler is a graduate of Oral Roberts University. He was an advisor for 12 years with another securities firm, maintaining his own investment office. Tyler is an accomplished financial advisor and has continually achieved numerous milestone honors and awards throughout his career. From a young age Tyler always wanted to be engaged in finance and help people learn more about what the educational system doesn’t teach: how to change the the financial future for them and the next generation.

In Tyler’s spare time he likes to golf and travel. He has had the great honor to play in many prestigious golf tournaments. Over his career, Tyler has succeeded in National Junior events to College DI Championships.



His favorite interest of all is spending quality time with his beautiful wife, Lilia, and their two handsome boys Lucas and Max. Tyler enjoys coaching and teaching his boys as they start the adventure of being involved in many sports and activities.

Financial Advisor*

Don Sullivan

Don is a graduate of Southwestern Oklahoma State University. He was an agent for 23 years with Edward Jones, maintaining his own investment office. Don is an accomplished and recognized high-level financial advisor, earning numerous industry awards, including the prestigious Managing Partner award. Currently, he is the Vice President and Chief Investment officer for D.S Drelich & Associates.



Don Sullivan is also a licensed and ordained minister and has worked with many 501(c)(3) organizations. Don and his wife, Peggy, reside in St. Augustine, Florida, and enjoy short-term missions and humanitarian trips to Central and South America. They have two adult children and five grandchildren.

MBA, Vice-President, Chief Investment Officer*

Jeremy Pember

Jeremy covers some of the fields of the financial industry and appreciates the importance of each aspect. As part of the team at D.S. Drelich & Associates, he helps create portfolios tailored to each individual client. Jeremy graduated with a Bachelor of Arts from Oral Roberts University in Tulsa, Oklahoma. He then went on to graduate from RHEMA Bible Training Center. He leads a very active lifestyle, including surfing, weightlifting and mountain biking. Jeremy volunteers at local churches and spends his free time with his beautiful wife and three adorable daughters.

Financial Representative**

Matthew C. Smith, MBA

Matt is a seasoned financial professional with over 25 years of experience in stock trading, including the last five years as a licensed professional. His long-standing interest in the stock market and investing has shaped his career path.

Before joining DS Drelich, Matt spent more than 12 years in the banking industry, where he advanced to the roles of Vice President, Cashier, and Board Member. He holds a bachelor’s degree in business administration with a concentration in financial planning and a master’s in business administration, both from Northeastern State University (NSU) in Tahlequah, Oklahoma. Throughout his career, Matt has served on the Board of Directors for several banks, demonstrating his leadership and commitment to the financial sector.

In addition to his professional achievements, Matt is actively engaged in his community. He serves as a board member for multiple local charitable organizations and has held the position of Past-President and current member of the Bristow Rotary Club. His dedication to community service includes having served as the local chair for the United Way and participating in various city government committees.

Outside of work and community involvement, Matt enjoys woodworking, fishing, hunting, and raising cattle and chickens. Most importantly, he cherishes quality time with his family. Matt is married to his high school sweetheart, Jessica, and they have two wonderful children, Abigail and Connor. The family is also active members of the First Baptist Church in Bristow.

Financial Advisor

Dana Pember

Dana has been with D.S. Drelich & Associates since 2015. She joined as a full-time member of the support team and is now the head of the Client Services department serving as Operations Manager. She helps ensure that client needs and expectations are met and exceeded. She is an integral part of the staff and works closely with Doug, Don, John and Jeremy on new business. New and existing clients meet with and speak to Dana about service issues and questions on a regular basis throughout the process of doing business with D.S. Drelich & Associates.

Dana is a graduate of Oral Roberts University in Tulsa, Oklahoma. She graduated with honors with a Music Education degree. Throughout her teaching career, she has received many awards and leadership promotions. Dana has also had a lot of experience in event coordinating and public speaking.



Dana resides in St. Augustine, Florida. She has a beautiful family that includes her supportive husband, Jeremy, and daughters Kylie, Lexie and Laynie. Dana enjoys cooking, playing piano, singing and composing music. Her family is very involved at local churches around the area.

Operations Manager

Bret Hinman

Bret Hinman understands that navigating insurance can feel overwhelming. With 20 years of experience guiding clients on health, life, annuities and Medicare, Bret helps simplify big decisions by pinpointing exactly what matters most to each individual or family. His coaching roots—as a former professional tennis instructor—still guide him today: Bret knows that success comes from personalized strategies and patient guidance. He brings that same thoughtful, disciplined outlook off the court and into his retirement practice, committed to creating tailored approaches that reflect your unique goals and circumstances. As a husband and father of two active daughters, Bret shares the same priorities as many of his clients—protecting their family’s future, prioritizing wellness and enjoying life’s adventures, whether it’s practicing yoga with his wife, Larissa, or exploring new places with the family. Bret isn’t just your insurance professional; he’s your partner in preserving what matters most.

Lilia Sullivan

Bristow, Oklahoma office

Diana Harper

With nearly four decades of experience, Diana is the steady hand behind the scenes, ensuring every client interaction runs smoothly and efficiently. Her extensive background spans 401(k) and defined-benefit pension plan administration, client service, and office operations—making her an invaluable resource for both our team and the clients we serve.

Before joining DS Drelich in 2019, Diana spent 22 years with Edward Jones as a Senior Branch Office Administrator, where she supported client relationships and daily operations, including 11 years working alongside Tyler in Bristow. Prior to that, she spent 11 years in the Employee Benefit Department at The Trust Company of Oklahoma in Tulsa, managing everything from new account processing to contributions and distributions for 401(k), pension, and profit-sharing plans.

Diana brings a calm, knowledgeable presence to our office, backed by a career built on reliability, precision, and a genuine care for people. Whether it’s coordinating account service, navigating complex paperwork, or simply answering questions with a smile, clients know they’re in good hands with Diana.

A lifelong Bristow resident, Diana cherishes time with her two grown sons, their families, and her grandchildren. When she’s not at the office, you’ll find her crafting, sewing, working in her yard, or lovingly supporting her aging parents.

Operations Manager

Lindsay McKinzie

Lindsay is often the first friendly voice or face our clients encounter—and the unwavering support behind many of the details that keep our office running seamlessly. As Executive Assistant in our Bristow office since 2022, Lindsay plays a key role in making sure clients feel welcomed, informed, and cared for at every touchpoint.

With a background in office management in the medical field, Lindsay brings five years of hands-on experience in administration, client service, and operational efficiency to her role at DS Drelich. Her time supporting patient care in a high-volume setting sharpened her attention to detail and her ability to make every interaction feel personal and professional.

Lindsay is a proud graduate of Oklahoma State University and a dedicated member of the Bristow community. She and her husband, Shane, are raising their two children, Payton and Beckett, with strong values and an appreciation for family. Outside the office, she enjoys spending time with loved ones, participating in local events, and making regular trips to Florida to visit her parents.

With Lindsay’s warm demeanor and behind-the-scenes know-how, clients can always expect a thoughtful, responsive experience that reflects the heart of our firm.

Executive Assistant

Anne Whitlock