John received his PhD from University College Dublin in 2008. His well cited thesis work on “Trust in recommender systems” was nominated for a national doctoral dissertation award in Science and Engineering, and his most recent work on information credibility won a best paper award at IEEE SocialCom 2013.  John has published more than 40 technical papers and has successfully secured external research funding from sources such as ARL, KDD and NSF.  He currently leads a team of researchers from CMU, UIUC, and ARL as part of a 5-year network science project.  John is an active Editor, PC member and reviewer for more than 10 conferences, workshops, and journals.  He is a member of ACM and IEEE.