Original sentence: Buchwald was a social engineer, with the ability to manipulate phone system employees anywhere in the United States.In addition, he had a hacking skill with regard to Bell and AT&T systems (specifically COSMOS, SCCS, and LMOS), which allowed him virtually unrestricted access to phone lines, including the ability to monitor conversations, throughout the country.Some of his original ideas are still in use by social engineers today
Edited sentence: Buchwald was a successful social engineer, with the ability to manipulate phone system employees anywhere in the United States.In addition, he had a high level of hacking skill with regard to Bell and AT&T systems (specifically COSMOS, SCCS, and LMOS), which allowed him virtually unrestricted access to phone lines, including the ability to monitor conversations, throughout the country.Many of his original ideas are still in use by social engineers today