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Brett O'Brien

Brett O'Brien

National Security Law Firm

Washington, DC

VA accredited since 2020VA accreditation #48870

Google ratings

4.9309 reviews
5 297
4 3
3 0
2 1
1 8
security clearance issuesappeal processwaiver approval
Firm reviewsAs of 10-2026
Jason A.★★★★★

I worked with Zena for about two years, my case was very intricate, and she was excellent from start to finish. She helped me with a difficult matter involving the removal of online content and consistently provided great communication, professional service, and strong results. She always returned emails, took the time to explain the process, and made sure I understood my options. I always felt that she genuinely cared about my case and was committed to getting the best possible outcome. I’m very grateful for everything she did and would highly recommend Zena to anyone looking for a knowledgeable, responsive, and professional attorney.

Bella★★★★★

I cannot thank Aaron and his legal team enough! They saved my husband's career. I am so grateful for them. If you are looking for an excellent lawyer regarding federal employee law and defense, Aaron is the one! Every step of the way, Aaron was very thorough, quick to communicate and respond, and provided us with a fantastic legal defense. Everyone was so impressed by Aaron, including the deciding official. Thank you, Aaron, and the legal staff at National Security Law Firm from the bottom of my heart. God bless you all!

Tom★★★★★

I set up a time to consult with one of their attorneys, who listened to my situation with kindness and understanding in addition to their extensive experience and knowledge. I am very grateful for the consultation and would readily contact them again in the future if the need arises.

Reply from the firm

Thank you so much for your kind words, Tom! We're glad our attorney could take the time to understand your situation and offer helpful guidance. Treating every client with care and respect is at the heart of what we do. We truly appreciate your trust in our team, and please don't hesitate to reach out if you ever need us in the future. – National Security Law Firm

Megan J.★★★★★

Alyssa was amazing. Not only did she help me with a tremendous rebuttal, she was always there for me helping me through the mental side of an investigation. I couldn't recommend her more.

Reply from the firm

Megan, thank you so much for sharing this — it means a great deal to us. Investigations can take a real toll, not just on the case itself but on the person going through it, so we're so glad Alyssa was able to support you through both the substance of your rebuttal and the mental and emotional side of the process. We'll be sure to pass along your kind words to Alyssa. Being there for our clients, not just as attorneys but as people who genuinely care, is something we strive for, and it's wonderful to know that came through so clearly for you. Thank you for trusting National Security Law Firm with something so difficult, and for taking the time to share your experience. We wish you all the best moving forward. Warm regards, The National Security Law Firm Team

Russ A.★★★★★

These folks did everything they said they would and I received a reinstatement of my Global Entry. Maria Gutierrez and Alex Carr were professional and efficient. Hope I don’t have to use their services again but would do so with confidence. I recommend them highly.

About the firm

1250 Connecticut Ave NW Ste 700, Washington, DC 20036

Office hours
Friday
8AM-5PM
Monday
8AM-5PM
Sunday
Closed
Tuesday
8AM-5PM
Saturday
Closed
Thursday
8AM-5PM
Wednesday
8AM-5PM
Google business details · 2026-10

VA roster information

VA accreditation number 48870

Washington, DC

This listing has not been claimed and approved. These facts come from VA's public accreditation roster.

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