Meet Your Team.

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J. Mark Joseph

  • Mark received his Bachelor of Science (BS) and Master of Science (MS) in Accounting/Taxation from the University of Virginia (UVa). After graduating from UVa Mark began his financial career with a big five accounting firm, where he provided financial planning and tax counsel to ultra high net worth individuals. Prior to founding Sentinel, Mark was a Partner and Managing Director of the Washington, D.C., office of a large financial advisory firm with several billion dollars under management.

    With Mark’s 30+ years of experience in financial planning, his expertise has been recognized throughout the financial services industry. Mark has been listed as a top financial advisor in publications such as Washingtonian magazine, Northern Virginia Magazine and the Washington Business Journal. In addition to being published in The Journal of Financial Planning, Mark has been quoted by many media outlets including, the Wall Street Journal, the New York Times, Money Magazine, USA Today, Kiplinger’s Finance magazine and US News and World Report.

    Mark is involved in the community, consulting with and serving on the Boards of Directors for various non-profit organizations. When not crunching numbers, you might run into him at a Nationals game, local comedy show or country music concert. Mark, his wife Karen and their three children live in Herndon, Virginia.

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Kelley L. Berry

  • Kelley joined the firm in 2004 with over 10 years of executive administrative experience. During her 15+ years with Sentinel she has built excellent relationships with our clients. Her detailed knowledge of each client’s goals allows her to excel in the role of Client Services Manager. 

    Kelley is an anchor of the Sentinel team.  She is the primary liaison between our clients, advisors and custodial firms.  She manages client workflow, coordinates client services as well overseeing marketing initiatives and events. 

    Kelley attended George Mason University. She enjoys volunteering at her local church, traveling/hiking, and family beach vacations. Kelley lives in Gainesville, Virginia, and has two grown children.

Dannielle LaRosa

  • Dannielle brings more than thirty years of accounting and finance experience to Sentinel Wealth Management. After earning a Bachelor of Science in Accounting from Virginia Tech, she began her career as a certified public accountant with KPMG, then broadened her expertise at MCI and several start‑ups and local businesses. She later completed her MBA at the University of Maryland’s Smith School of Business and has served as chief financial officer and director of finance for multiple organizations.

    A lifelong volunteer and community advocate,  Dannielle's dedication extends to a variety of school and nonprofit boards, and she was elected to the Reston Association’s Board of Directors, serving as Treasurer and North Point Representative. Her impact has been recognized with the 2021 Community Hero Award from the CORE Foundation and the 2017 Making the Difference Award from the Reston Association.

    At Sentinel, Dannielle pairs her technical expertise with a genuine passion for personal financial planning to help clients define goals, design strategies and put their plans into action. Her mix of corporate insight, nonprofit leadership and unwavering commitment to community ensures that every client receives guidance grounded in both experience and empathy.