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Catherine (Cathy) Mack is an experienced estate planning attorney licensed to practice in Maryland, Washington, DC, and Virginia. For the past twenty-four years the Law Offices of Catherine R. Mack has focused on estate planning (wills, trusts, financial and medical power of attorney), trust and estate administration (e.g., probate) and estate and trust related litigation (will caveats and other disputes that arise in the context of estate planning and administration).  

Cathy Mack joined Bregman, Berbert, Schwartz & Gilday, LLC as Of Counsel, in February of 2021.

Whether a relatively simple Will or more complex assistance due to diversified investments and substantial wealth, Cathy has the skill and the experience to help clients in all aspects of estate planning. In today’s ever more uncertain world, it is extremely important to consult with a knowledgeable estate planning attorney to ensure that your assets can be managed with a minimum of disruption if you are severely injured or disabled and to guarantee that your property is distributed in accordance with your wishes after your death.

Cathy’s diverse experience before opening her own estate planning practice includes graduating first in her class from law school, serving as an Assistant United States Attorney for the District of Columbia and running the legal department of a New York Stock Exchange company located in Rockville, Maryland.

Her broad background in the law has enabled her to assist her clients in their estate planning, probate, and trust administration needs.  By joining the firm in an “Of Counsel” position, Cathy is now able to offer her clients continued high-level estate and trust legal services complemented by the firm’s knowledgeable and growing Estates and Trusts practice group.

For more information about Cathy’s extensive background and experience, please visit

  • Memberships
    • District of Columbia Bar Association – Estates, Trust and Probate Section
    • Maryland State Bar Association – Estates and Trusts Law Section
    • Montgomery County Bar Association – Estates and Trusts Law Section
    • Estate Planning Council of Suburban Maryland
    • American Bar Association
    • Phi Kappa Phi