Grey Laniewski

Years of Experience

4 years


Cornell University
M.S. in Management

Siena College
B.S. in Accounting

Industry Expertise

Biotechnology, Financial Services, Healthcare, Real Estate, SaaS

Big Four Alma Mater


Grey Laniewski

Consultant – Advisory

Grey brings 4 years of accounting and financial reporting experience to WilliamsMarston. Since joining WilliamsMarston, Grey has advised clients in a variety of industries including software, technology, healthcare and manufacturing. He has advised clients on buy-side and sell-side financial due diligence for mergers and acquisitions and FP&A modeling.

Prior to joining WilliamsMarston, Grey worked in the Assurance practice of EY LLP’s Boston office. While at EY, Grey was an integral part of the audit teams serving two of the office’s largest Wealth & Asset Management clients. Grey led the valuations testing of Level 3 investments on his engagements while overseeing all audit areas, including the review of the financial statements in accordance with US GAAP. Grey’s industry experience includes financials services, software-as-a-service, biotechnology, healthcare and real estate, among others.

Grey is a Certified Public Accountant in the State of New York and the Commonwealth of Massachusetts. He holds a Master’s Degree in Management with an Accounting Specialization from Cornell University and Bachelor of Science in Accounting from Siena College, where he graduated summa cum laude.