Brand, Marquardt & Callahan, PLLC

Toll Free (866) 829-4454
Local (202) 789-2382
Fax (202) 552-7354
1325 G Street, NW # 500, Washington, DC 20005

Hours of Operation: Monday – Friday, 8:30 a.m. – 5:30 p.m. | Proudly Serving Customers in the District of Columbia & Maryland

Brand, Marquardt & Callahan, PLLC

Michael E. Brand

Michael E. Brand is the Managing Member of the Firm.  He has more than thirty years of experience in all areas of law in which the firm specializes.  He is a highly-regarded real estate and contract litigator in the local and Federal Courts in the District of Columbia and Maryland.  He has tried numerous jury and bench trials in the DC Superior Court and has argued multiple appellate matters.  Mr. Brand represents real estate management companies and landlords, as well as a wide range of commercial entities.  He practices before the local and Federal Courts of the District of Columbia and the DC Circuit, as well as the state and federal courts of Maryland.

Professional Affiliations:

District of Columbia Bar Association, Real Property Section

Bar Admissions:

District of Columbia


US District Court for the District of Columbia

US Bankruptcy Court for the District of Columbia

US Court of Appeals for the District of Columbia Circuit

US Bankruptcy Court, District of Maryland


B.A. University of Rochester

J.D. Catholic University, Columbus School of Law

Certificate, Notre Dame University Summer Law Pogram, United Kingdom

American Jurisprudence Award, University of Toledo 

Peggy A. Marquardt
Peggy A. Marquardt has been with Brand, Marquardt & Callahan, PLLC since January 2008 and is admitted to practice before the District of Columbia Court of Appeals and the Court of Appeals of Maryland.  She focuses her practice on a variety of matters pertaining to real estate and real property litigation and has considerable experience in residential and commercial landlord and tenant disputes, contract disputes, real estate transactions, and condominium conversions.  Ms. Marquardt also handles matters relating to the administration of decedent’s estates, adult protective order proceedings, and administration of the estates of minors.  Ms. Marquardt earned her Juris Doctor from Stetson University College of Law in Gulfport, Florida.  She attended the undergraduate program at the University of Maryland, College Park earning both a Bachelor of Science in Marketing from the Robert H. Smith School of Business as well as a Bachelor of Arts in English.

John J. Callahan – Of Counsel

John J. Callahan is a graduate of The Columbus School of Law at the Catholic University of America in Washington, D.C. and received his B.A. from Boston College.  Mr. Callahan is a member of the District of Columbia Court of Appeals and the United States District Court for the District of Columbia and is a member of the Real Estate, Housing and Land Use Section of the District of Columbia Bar Association.  Mr. Callahan’s law practice focuses almost exclusively on real estate matters.  Mr. Callahan previously worked for the Clerk of the United States House of Representatives and at the law firm of O’Connor & Hannan LLP.  Mr. Callahan is Of Counsel to Brand, Marquardt & Callahan, PLLC.