Lasting relationships. For all that matters

Diane Johnston

Financial Advisor

Endowment & Foundation Consultant

I am a navigator! I navigate complex situations to pilot deal structures to help business owners monetize and also solve for asset allocation and investment fiduciary duties for small institutional plans (ERISA plans or E&F). My clients take care of so many people that they often don’t have time to take care of themselves. That’s where I step in to help them with their wealth. Often that includes plans that fall under ERISA or Endowments and Foundations, and I help with employee and donor education.

For over two decades, I have brought sophisticated solutions to complex investors to position them for optimal outcomes. I help to uncover unique beliefs and goals to form a financial road map not only for specific circumstances, but for dreams and ambitions, all while using an institutional skill set and toolbox.

Challenges that business owners face today are all too real. From regulatory and tax concerns to remaining passionate about a business or mission that may face outsized obstacles; being winged and ready is more important now than ever. The more an owner can pre-experience financial decisions and conditions, the better connected to their wealth creation’s success they will be.

Endowments and foundations, and ERISA plans, face their own unique set of circumstances that have only increased as headwinds blow harder. Unfortunately, limited time and resources can make for missed market opportunities and governance missteps. As a seasoned finance leader, I identify the roadblocks to success and curb them by bringing alternative solutions to navigate choppy conditions.

I live on Long Island with my husband, Doug, and am the proud mother of four young men. I enjoy racing and cruising with my family on our sailboat, and am learning to transition away from being a distant runner and finding new sports. I also like to stroke my artistic side as much as possible through writing, painting and sketching.

Registered States:
  • CA
  • CT
  • DE
  • FL
  • GA
  • IL
  • KS
  • MA
  • MI
  • MO
  • NC
  • NJ
  • NY
  • OH
  • OR
  • PA
  • RI
  • SC
  • TN
  • VA
  • WY


  • B.A., Economics , Sewanee: The University of the South
  • Executive Certificate in Business Administration , Mendoza College of Business at the University of Notre Dame


  • Endowment & Foundation Consultant
  • Series 7, 24, 31, 55, 63, 66

Our advice is comprehensive. We help diverse clients in a broad range of areas, including:

Exit planning
Asset allocation
Alternative investments
Impact investing
Business succession
Institutional consulting
Retirement Plan consulting
One Jericho Plaza
Suite 205
Jericho, NY 11753
  • (516) 745-8964

Email Me

Diane Johnston is also part of:
The Excelsior Consulting Team

A focus on personalized access and service

Working with diverse clients with specific needs, our team sees it as our top responsibility to understand each aspect of your unique and often complicated financial life.

Advice for business owners and entrepreneurs

Advice for business owners and entrepreneurs

Goals-based planning

Goals-based planning


A way forward

What's your vision?

We can help you bring your vision to life.

Our 150-year heritage of managing the wealth of generations of the world’s visionaries—creative thinkers, driven doers, legacy builders—is a testament to our passion for what we do.

Backed by the strength of UBS

A global leader in wealth management


Global Equity Research 

Institutional Investor, 2021 Global Rankings


Serving Business Owners

Euromoney Private Banking and Wealth Management Survey, 2020

More than 150 years

offering financial advice