Independent Family Office Advisors:
Our Firm
Established in 2005 by founder William J. Boer, Grey Dunes has successfully advised more than eighty families.
From the beginning, it’s been our goal to help entrepreneurial, ultra-high-net-worth families extend their legacies. Our services range from leading the selection of investment advisors and assessing existing family holdings to building family offices from the ground up. Whatever your family's needs, Grey Dunes has the wisdom and experience to help you meet and exceed your goals.
With Grey Dunes, you can build a legacy that will last for decades.
Our Mission & Core Philosophy
We exist as a trusted partner for families dedicated to preserving and extending their legacy across generations. Building this solid foundation in an ever-changing environment requires skill, patience, and wisdom.
By operating as independent and objective family office advisors, we build and execute the plan to coordinate the complex legal, financial, and strategic affairs of your wealth. We recognize the inherent nuance of family dynamics and the multifaceted nature of legacy planning—from investments and taxes to personal assets and foundations.
Our philosophy centers on objectivity, unwavering trust, and holistic guidance, ensuring comprehensive, unbiased solutions to secure your future with absolute confidence.
“The color of truth is grey.”
André Gide, Winner, Nobel Prize in Literature, 1947
Meet Our Expert Advisory Team
William J. Boer
President & Founder
wjboer@greydunes.com
Since founding Grey Dunes in 2005, Bill Boer has worked with over eighty families in various capacities, from selecting an investment advisor or providing an assessment of existing family holdings to establishing a family office.
A graduate of Calvin University with a B.A. in Economics, Boer went on to earn an M.B.A. with honors in Finance and Strategic Planning from the University of Southern California, as well as an M.S. in Higher Education from Indiana University. Boer served as vice president for administration and finance at Calvin University and subsequently as president of Michigan National Bank in Grand Rapids.
In 1995, he accepted a position as the chief operating officer of RDV Corporation, the Richard M. DeVos family office. The DeVos family owns Amway Corporation and the NBA’s Orlando Magic. In this capacity, Boer was responsible for running the office’s day-to-day operations, which included managing investments, foundation administration, and financial services.
Boer currently serves on the Board of Directors of Independent Bank Corporation. He previously served as Chair of the Board of Directors of the Frederick Meijer Gardens & Sculpture Foundation and as Chair of the Helen DeVos Children's Hospital Committee. He served on the boards of Spectrum Health Hospital, Calvin University, and the West Michigan Aviation Academy. An Eagle Scout himself, Bill served as a board member of the Gerald R. Ford District of Boy Scouts of America.
Heather J. Noordyke, Executive Assistant
hjnoordyke@greydunes.com
Heather Noordyke has been a valued member of the Grey Dunes team since 2010. As a seasoned project manager with deep organizational, communication, and problem-solving strengths, she provides executive-level support across a wide range of family office functions. Heather’s extensive experience allows her to anticipate client needs and deliver thoughtful, efficient solutions.
Her responsibilities include communication management, financial reporting, scheduling, research, and overall office administration—each supported by her strong attention to detail and commitment to service.
Heather received a Legal Secretary associate’s degree from Davenport University and previously spent several years with the law firm Miller Johnson. She and her family live in Grandville, Michigan.
What We Can Do for Your Family Office
Our expertise encompasses all critical areas of family office advisory. Learn how our guidance translates into lasting support for your generational wealth.
Get Started
Your legacy deserves best-in-class stewardship. Contact our team to begin your family office journey.