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John C.


Columbia, MD

Member since:

November 25, 2013

Where did you hear about this group?

USENIX mailing group

How long have you been developing with Java?

Since 1996

What are your favourite technologies at the moment?

Ruby on Rails, Heroku, and Mahout

Would you be interested in hearing about any new Java permanent or contract positions at present? (if yes please add which would be of more interest)

Yes, specifically container environments like Docker

Would you be interested in either guiding/mentoring junior developers, or being mentored yourself in any particular topic? If so we'd love to help! Please expand on which areas you could help, or would like help.

No answer yet


Dr. John Callahan is an Associate Director at the Office of Naval Research Global London UK office whose portfolio includes ISTAR and cybersecurity. He holds a PhD in CS from the University of Maryland. He has worked at JHU, Xerox and IBM Corp.

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