Where is John Callahan based?
John Callahan is based out of New York, New York, United States.
What is John Callahan's work email address?
John Callahan's professional email address is j*****@veridi***.com
Who are John Callahan's co-workers?
John Callahan's colleagues are John Spencer, Nikos Nikolaou, Rainer Witzgall, Colin Duncan, Jeremy Philpott, Ionut Dumitran, Richard Tyson, Lionel Monchecourt, Radu Ionescu, Rajiv Pimplaskar, Ionut Popa, Claudia Belcsak, Matthew Forrest, Jonathan Allatt, Ross Penny, Valentin Iftimi, Shubham Wagh, John Quarles, John Chester, Kirjon Ngu, Alexandru Antonica, Baber Amin, Laura Lucanu, Cristian-Teodor Iliescu, Benjamin Rayneau-Kirkhope, Alexandru Gherghe.
