J. Kathryn Delmain brings more than two decades of experience in wealth management operations and client service to One Private Wealth &Partners. Born and raised in St. Clair, Missouri, Kathy has built her career around delivering exceptional service to high-net-worth families through operational excellence, strategic leadership, and unwavering integrity. Her personal mission is to lead with absolute integrity while ensuring elite client care and seamless onboarding through efficient, forward-thinking team leadership.
Throughout her career, Kathy has worked alongside Managing Directors Dave and Tom for the past 27 years, supporting clients across respected firms including Stifel Nicolaus, Merrill Lynch, UBS Financial, and now One Private Wealth &Partners. She values the lasting relationships she has built with clients over the years, earning their trust by helping solve complex challenges and providing dependable support when it matters most. Kathy also credits the exceptional team she works with for creating a collaborative environment that feels like a second family, allowing them to consistently deliver the high standard of service their clients deserve.
Kathy’s career is distinguished by her regulatory expertise, operational leadership, and commitment to excellence. She holds Series 7 and Series 66 registrations and has overseen complex transactional workflows and account structures with a strong focus on compliance. She was selected to participate in Merrill Lynch’s advanced institutional leadership training at its corporate campus in Princeton, New Jersey, and later served as a Financial Advisor Transition Lead, where she coordinated complex advisor transitions and multimillion-dollar client book migrations while ensuring business continuity and a seamless client experience.
One of the most defining moments in Kathy’s career occurred early on while working at Stifel Nicolaus. Witnessing the tragic events of September 11, 2001, unfold—and losing colleagues and friends who worked in the Twin Towers—profoundly shaped her perspective on leadership, resilience, and the importance of serving others with compassion and purpose.
Education and Credentials:
- St. Clair High School
- FINRA Series 7 Registration
- FINRA Series 66 Registration
- Missouri Notary Public
Personal Life and Interests:
- Looks forward to an annual mother-daughter trip to explore new beach destinations
- Married to her husband, Dennis, for 33 years
- Proud mother of Taylor and Dalton
- Enjoys spending time with family and friends, boating on the Meramec River, and relaxing at the family clubhouse
- Participates in the annual Hot Rod Power Tour, enjoys taking vintage cars to drive-in movies, and attending events at Gateway Race Track
- Loves painting, crafting, and shooting pool
- Enjoys taking her and her daughter’s German Shepherds, Luna and Winnie, on boating adventures and outings
