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Contact
Email
Phone
+12029181123
Address
1101 Connecticut Ave Nw Ste 1100, Washington, DC, 20036, US
Professional
Bar Number
5029780
About
John Masslon is an attorney with Keller Postman LLC in Washington, DC, where he practices general law with a focus on delivering thoughtful, effective legal guidance to individuals and businesses navigating a wide range of matters. Based in the nation’s capital, Mr. Masslon brings a professional, client-centered approach to his work, helping clients understand their options and move forward with confidence. He is admitted to practice in the District of Columbia under Bar Number 5029780. At Keller Postman LLC, Mr. Masslon is committed to providing clear, practical counsel tailored to each client’s unique needs and goals. He approaches every matter with diligence, attention to detail, and a strong appreciation for the importance of responsive service. Whether assisting with routine legal issues or more complex concerns, he works to ensure clients receive knowledgeable support and straightforward communication throughout the process. With his Washington, DC location and broad general practice background, Mr. Masslon is well-positioned to serve clients seeking dependable legal representation in a fast-paced and highly regulated environment. He values building trust through professionalism, preparation, and a steady commitment to client advocacy.
Credentials
Education
Georgetown
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Updated: Aug 09, 2026