
Donald H. Sienkiewicz, JD, CFP®

I help people who feel the tension
between what their money is doing
and what they wish it were doing.
For twenty-two years I practiced law in New Hampshire and Massachusetts — trusts, estates, real estate. I spent a lot of time sitting across the table from people at important moments in their financial lives. What I noticed was that the people who seemed most at peace weren't necessarily the wealthiest. They were the ones who knew what their money was for.
In 2020 I earned my Certified Financial Planner® designation and began a second career in investment management. I am affiliated with J. R. Prunier Capital Management, LLC, an SEC-registered, fee-only fiduciary firm — which means I am legally required to put your interests ahead of my own, and I am not paid commissions on investments I recommend.
I work with a small number of families — typically with a million dollars or more to invest — who want rigorous, competent financial planning and who care deeply about what their capital is actually doing in the world.
Finding investments that are both financially sound and genuinely aligned with ecological and social health is hard work. I am willing to do that work with you.
To talk, call Faith Mayer at the J. R. Prunier Capital Management office, Tuesday through Thursday:
(508) 756-8080
My minimum annual fee is $10,000 which typically corresponds to an investment of one million dollars.
Flat-fee arrangements are also available.
I am an independent Investment Adviser Representative affiliated with J. R. Prunier Capital Management LLC, an investment adviser registered with the Securities and Exchange Commission. Opinions expressed on this site are my own and not those of J. R. Prunier Capital Management LLC.