According to a letter released by the House Committee on Oversight and Government Reform, the Office of Personnel Management discovered the data breaches on its servers rather than the contractor CyTech.
According to some past claims, CyTech employees met with OPM officials to demonstrate a product and that in doing so, discovered some “unknown processes” running on the OPM computer system that needed further investigation which may have been the initial discovery of the data breach.
According to the letter’s author, Congressman Elijah Cummings (D-MD), OPM actually discovered the breach a few days before the CyTech presentation. The House Committee reached this conclusion after obtaining and analyzing data and testimony on the data breaches.