Member Directory

Thomas Costello

Costello Law Group
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Thomas Costello
Costello Law Group

Thomas C. Costello

Admitted to practice in 1994, Mr. Costello, an AV rated litigator, began his legal career by representing securities broker-dealers in connection with their employment disputes, customer disputes and regulatory inquiries. In 2010, Tom formed the Costello Law Group and shifted the focus of his practice to the representation of customers in connection with their claims against investment professionals. He has successfully represented hundreds of individual investors across the United States to resolve their claims. Tom has represented individual investors against firms like Merrill Lynch, Morgan Stanley, UBS, Wachovia, Wells Fargo, Sun Trust, CIBC Oppenheimer, Metropolitan Life, John Hancock, Charles Schwab, Lincoln Financial Advisors, Ameriprise, Linsco Private Ledger, Smith Barney/Citigroup, BB&T and Prudential in addition to many other investment advisory firms, both large and small. He has also litigated claims against insurance, legal and tax professionals. Tom’s efforts have resulted in million dollar plus verdicts, awards and settlements for his clients.

In 2009, Tom earned a Legal Master’s Degree in Taxation (LLM) with a Certification in Estate Planning from the University of Baltimore School of Law. Tom has drafted and implemented tax efficient estate plans for high net worth individuals as well as for those individuals with more modest assets who simply want to make sure their family is provided for in the event of a tragedy. Tom is also experienced in representing estates, trusts (both trustees and trust beneficiaries) and heirs in the probate administration process as well as in estate disputes resolved through the court system.

Finally, Tom has represented hundreds of individuals with claims for personal injury and nursing home abuse/ neglect. Tom’s work in these areas of litigation has resulted in tens of millions of dollars recovered for clients.


Securities/Investor Rights Litigation

Estate Planning and Administration

Estate & Trust Dispute Litigation

Legal, Accounting, and Insurance Malpractice Litigation

Personal Injury/Nursing Home Neglect Litigation


Maryland, 1994

District of Columbia, 2000

U.S. District Court District of Maryland, 1995

U.S. District Court of the District of Columbia, 2001

U.S. Court of Appeals 4th Circuit, 2008

U.S. Supreme Court, 2000


University of Baltimore School of Law, Baltimore, Maryland

L.L.M. (Taxation) – 2009

University of Baltimore School of Law, Baltimore, Maryland

JD cum laude – 1994

Washington & Lee University, Lexington, Virginia

B.A. – 1991


Mathews v. Cassidy Turley, et al., 435 Md. 584 (2013)

Barbour v. International Union, 640 F.3d 599, (4th Cir. 2011)

Commonwealth Equity v. Messick, 152 Md. App. 381, (2003)

Bollman v. Splash & Dash, LLC, Md. CSA, Sept. Term 2013, No. 2238 (2015)

Bollman v. Splash & Dash, LLC, Md. CSA, Sept. Term 2010, No. 1179 (2012)


Liability Issues for Financial Planners, Financial Planners Assoc. of Md.


University of Baltimore National Appellate Advocacy Team


Public Investors Arbitration Bar Association, Member, 2008 – Present

Maryland Association for Justice – Member 2010 – Present

Maryland State Bar Association, Member, 1994 – Present

Baltimore County Bar Association, Member


West & Costello, Partner, 2003 – 2010

West & Moore, LLC, Associate/Partner, 1999 – 2003

Law Offices of John West, Associate, 1994 – 1999

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