WilliamsMarston is a national leader in complex accounting, tax and valuation services advising pre-IPO, public and private equity-backed companies managing rapid growth and transformation. We proudly serve as a trusted partner to our clients’ management teams, their investors and auditors.

The Foundation
of WM

The world’s leading businesses put finance at the heart of performance, demanding rigor, accuracy and consistency. They derive insight and foresight from hindsight and maintain a clear perspective on risk, opportunity and impact. Achieving such clarity is made possible through a strategic partnership with an advisor who has the experience, expertise and intelligence to see you through – an advisor like WilliamsMarston.

Landen Williams and Jon Marston founded WilliamsMarston in Boston in 2014, with the belief that middle-market companies, their investors and lenders were underserved in the accounting advisory space. Traditional firms were falling short in delivering value for transformational companies that needed to move swiftly, efficiently and with clear and actionable guidance.

With clear goals and limited resources, WM landed projects early on helping biotechnology and software companies prepare for their initial public offerings. Within a few months, WM began hiring full-time employees and moved into a modest office space. Two years later, the firm expanded to New York and further enhanced its offerings to include technical accounting, mergers and acquisitions, divestitures, private equity services, interim management and restructuring.

WM’s growth accelerated, marked by multiple acquisitions and a swift evolution into serving as a leading national provider of complex accounting, tax and valuation advisory services to companies across a variety of industries worldwide.

WM Today

Today, WilliamsMarston operates in Boston, New York, Philadelphia, Atlanta, Denver, Tucson, Dallas, Los Angeles and San Francisco, with 200 professionals and 1,500 clients. Leveraging market-leading professionals, nurturing talent and adapting to industry trends, we’re poised to exceed expectations, while serving the unique needs of pre-IPO, public and private-equity backed companies.

Where other firms overpromise and underdeliver, lacking the expertise and agility to move quickly and effectively, we thrive. Our services are designed to help our clients continuously support strategic initiatives, optimize financial reporting and operations, and manage compliance. Together, we clear the way to success.

What’s the WilliamsMarston Difference?

WilliamsMarston places client success at the heart of everything we do. From dedicated senior-level involvement in every engagement to specialized teams, our accounting, tax and valuation experts pair Big Four experience with strong technical and operational expertise to deliver unparalleled perspective, practical advice and effective solutions that accelerate impact.

Meet Our Team

Meet our talented accounting, tax and valuation experts. We are here to guide you through your most mission-critical initiatives.

Landen C. Williams

Landen C. Williams

Managing Partner

Jonathan T. Marston

Jonathan T. Marston

Managing Partner

Bruce Major

Bruce Major

Partner – National Tax Leader

Joseph McKneely

Joseph McKneely

Partner – National Valuation Leader

Rob Maxfield

Rob Maxfield

Partner – West Region Valuation Leader

Travis Hannon

Travis Hannon

Partner – Southeast Region Advisory Leader

David Charbonneau

David Charbonneau

Partner – Advisory

Stephanie Chen

Stephanie Chen

Partner – Tax

Ethan Cislaghi

Ethan Cislaghi

Partner – Valuation

Michael R. Donoso

Michael R. Donoso

Partner – Advisory

Brian Femia

Brian Femia

Partner – Tax

Marianne Kane

Marianne Kane

Partner – Tax

Join Our Team

Work alongside exceptional colleagues. At WM, you will collaborate on projects with team members from diverse backgrounds, learning new skills and gaining experience to help you at every stage of your career.

Our Offices

Wherever you need us, WilliamsMarston is there with the experts, experience and insights to see you through.

BOSTON

1 Washington Street
9th Floor
Boston, MA 02108

NEW YORK

230 Park Avenue
3rd Floor
New York, NY 10169

PHILADELPHIA

2001 Market Street
Suite 2500
Philadelphia, PA 19103

DALLAS

100 Crescent Court
7th Floor
Dallas, TX 75201

LOS ANGELES

2100 East Grand Ave.
Suite 320
El Segundo, CA 90245

SAN FRANCISCO

580 California Street
12th and 16th Floors
San Francisco, CA 94104

ATLANTA

3715 Northside Parkway NW
Building 400, Suite 550
Atlanta, GA 30327

TUCSON

1985 East River Road
Suite 111
Tucson, AZ 85718

DENVER

9250 E. Costilla Avenue
Suite 130
Greenwood Village, CO 80112