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David Callahan is a seasoned professional with extensive experience in law and business leadership. Currently serving as Co-CEO of UltraSignup since September 2020 and Chief Strategy Officer at Atiba, which specializes in Managed Services and IT Consulting, David's entrepreneurial spirit is further reflected in their founding roles at Callahan Bewley & Chandra, PLLC and their tenure as Of Counsel at Goodman Callahan & Blackstone PLLC. David's legal expertise encompasses probate and estate litigation, tax law, and corporate governance, supported by a Master of Laws in Taxation from The University of Alabama School of Law and a Doctor of Jurisprudence from the Nashville School of Law.