White Lighthouse Investment Management (WLIM) is an independent investment management and financial planning company based in Lexington, Massachusetts and Lausanne, Switzerland and was established in 2006. We provide fee-only investment management and financial planning services to individuals and families around the world. We specialize in serving overseas Americans, especially in Switzerland, non-Americans living in the United States, families with multiple nationalities and clients who require a global perspective. For more details, please visit our services page or contact us.

WLIM offers personalized service to each of our clients, many of whom are American and European expatriates in Switzerland, the United States and elsewhere around the globe. With clients on five continents and over a dozen nationalities, we understand many of the complications of personal financial planning across international borders and work with a network of specialists to serve all of the financial planning needs of our clients.

Additionally, we have a comprehensive understanding of U.S. regulations and practice which enables us to serve Americans and Green Card holders living overseas.

Jonathan Lachowitz CFP®

photo by: Aurélien Puthod

photo by: Aurélien Puthod

Jonathan Lachowitz is the founder of White Lighthouse Investment Management and a cross border expert. Jonathan is a CFP® professional and is authorized to use the CFP® marks in both the United States and Switzerland . He completed his MBA in Finance and International Business at New York University's Stern School of Business in 1997 Jonathan also holds a B.A. in Economics from Hamilton College.

Jonathan is a member of the Financial Planning Association (FPA) and is an active member of their cross border community He was the 2009 chair of the FPA Europe Africa and Middle East Geographic Focus Group. Jonathan also serves as a volunteer on the executive committee and board of American Citizen's Abroad (ACA) where he works in the areas of Social Security, Medicare , Banking and US taxation. Jonathan is also a member of ACA's Professional Tax Advisory Council. Jonathan is a Board member of the Swiss Financial Planning Organization (SFPO), who are responsible for licensing the CFP® marks in Switzerland.

Jonathan is an accomplished author on international personal financial topics and in 2014 was asked by the Wall Street Journal to be one of their Personal Finance Experts to write articles and answer reader questions on their new expat portal. Many of Jonathan's articles can be found here on our web site.

Before starting his company, Jonathan worked for fifteen years in international finance positions at Tetra Laval International, IMD and Ingersoll-Rand. In addition to investment management and financial planning, Jonathan was also an occasional lecturer at IMD, one of the world's leading business schools.

Marina Hernandez CFP®

Marina Hernandez joined White Lighthouse Investment Management as a Financial Planner and Investment Advisor in 2014. Marina is a CFP® professional and a federally licensed Enrolled Agent with unlimited rights to represent taxpayers before the Internal Revenue Service. Marina completed her MBA in Corporate Finance and International Business at the University of Georgia’s Terry College of Business in 1998. A native of Argentina, she holds a combined Bachelor’s and Master’s degree in Accounting from UCA, the Catholic University of Argentina.

Marina is a member of the Financial Planning Association (FPA), The National Association of Enrolled Agents (NAEA) and the National Society of Accountants (NSA). She serves as a volunteer on the Professional Tax Advisory Council of American Citizens Abroad (ACA) and as treasurer and financial advisor to several charitable and non-profit organizations in the greater Philadelphia area, where she lives with her family.

Marina started her career in corporate finance working for large multinational companies including Pilkington PLC and Coca-Cola. After leaving the corporate world, she founded MHTax, a cross border tax consulting firm providing tax planning, preparation and representation services to US expatriates and foreign nationals living or investing in the US.

Sara A. Nelb CFP®

Sara joined White Lighthouse Investment Management in 2017 as a Financial Planner and Investment Advisor. She is dedicated to helping each client achieve their unique goals with peace-of-mind, transparency, and collaboration.

Sara has worked in the finance industry since 2008. In her previous roles at Hoover Financial Advisors and The Haverford Trust Company she worked with individuals, multi-generational families, and institutions to help them achieve their unique investment and planning goals. Her varied experience includes identifying and analyzing alternative planning opportunities in areas such as retirement cash flow, investment execution, risk management, and executive compensation. Sara began her career in the finance group at QVC, Inc.

Sara is a CERTIFIED FINANCIAL PLANNER™ Practitioner and a member of the Financial Planning Association (FPA). She completed her undergraduate degree at Drexel University and holds a FINRA Series 65 license.


You are invited to contact us to schedule a free, no-obligation, consultation.


Certified Financial Planner Board of Standards owns the certification marks CFP® Certified Financial Planner™ and federally registered CFP (with flame design) in the U.S., which is awards to individuals who successfully complete CFP Board's initial and ongoing certification marks. SFPO, The Swiss Financial Planners Organization is responsible for licensing the CFP® certification marks in Switzerland.