Registration for participants closed on February 11, 2023 at 11:59 pm EST. You may still register to be a mentor, judge, volunteer, photographer, or workshop host. All attendees must adhere to the MLH Code of Conduct.


Participants must be current high school students attending Fairfax County Public Schools. Computer science and engineering experience is not necessary, as we'll have workshops and mentors so you can learn.

Please note that registering alone does not guarantee you will receive a ticket. Admission decisions will be made based on a variety of factors including the date/time you register.

Registration is Closed!


Judges must be present during the entire judging process (9:00 a.m. to 11:00 a.m. on Sunday), but not necessarily during the entire hackathon. Computer science and engineering experience is preferred but not required.

Mentors help students if they have any technical questions, and don't have to be present the entire time. Computer science and engineering experience is required.

Volunteers help with various tasks during the hackathon, such as checking in participants, setting up food, and more. Computer science and engineering experience is not required.

Mentor/Judge/Volunteer Registration


Photographers are only needed for 2 hours at a time (aside from the 2.5 hr shift on Sunday), but can sign up for multiple shifts. Participants can also be photographers.

Because of county regulations, only photographers who are part of Fairfax County Public Schools will be able to sign up. Additionally, only HackTJ participants can sign up for shifts after 10pm on Saturday, March 4.

Photographer Registration

Workshop Host

Workshop Hosts hold a session on a CS topic of their liking, providing participants a lesson on the topic and resources to learn more. These workshops will be conducted on Saturday, March 4 from 2pm to 6pm. Hosting a workshop comes with perks like free food and service hours!

Because of county regulations, workshop hosts who are not HackTJ participants must leave by 10pm on Saturday, March 4.

Workshop Host Registration