What company is John Callahan working for?
John Callahan works for Shiner Roofing, Inc..
What is John Callahan's function at Shiner Roofing, Inc.?
John Callahan is Production Management Consultant at Shiner Roofing, Inc..
Where is John Callahan based?
John Callahan is based out of Great Falls, Virginia, United States.
What is John Callahan's work email address?
John Callahan's professional email address is j*****@shiner***.com
Who are John Callahan's co-workers?
John Callahan's colleagues are Shannon Heindel.
