Leadership team

Dennis Cronyn

Associate Director

Dennis is an Associate Director in Protiviti’s Government Services office and a member of the global “Business Operations and Improvement” solutions team. Prior to joining Protiviti as a founder he spent two years with Arthur Andersen, a large public accounting and consulting firm, supervising and executing business consulting engagements. He has twenty-one (21) years of consulting and program / project management experience. He specializes in quality management system consulting, business process re-engineering (BPR), project / program management, and internal audit / ICOFR.  Prior to joining Protiviti / Andersen, Dennis was a naval officer in the military. His prior service includes experience in division leadership, engineering systems management, training organization management, emergency response management, and human resources management.

John Diduro


John is an IT security professional with more than 30 years of professional experience including 16 years delivering consulting services to public sector organizations. Prior to joining Protiviti Government Services in 2011, John spent 11 years with LMI where he was responsible for establishing LMI’s cybersecurity practice. At Protiviti, John leads a team of Protiviti security professionals who specialize in the NIST Risk Management Framework, NIST special publications focused on security and privacy (the NIST “800 series”) and FISMA. His current Federal clients include the National Institute of Health, General Services Administration, and Pension Benefit Guaranty Corporation. John also supports a number of Protiviti commercial engagements when FISMA expertise is required in delivery, and is leading Protiviti’s initiative to exchange cybersecurity information, and engaging in analytical collaboration on cybersecurity issues with commercial enterprises.