Prior to joining Unisys, he was the Director of Global Managed Security Services for IBM where he had responsibility for delivery services in 133 countries and managed a staff of 1,500 security professionals. Newfield led the Managed Security Practice that performed Device Management, Threat Intelligence, Managed Security Information and Event Management, Account Governance, Project Management, Deployment Services, New Service Integration Business Operations, Compliance/Governance and Architecture Services. Newfield was also the Business Unit Information Security Officer and Global Process Officer for IBM's Security Services Organization. During his time at IBM, Newfield streamlined operational processes and developed cost reduction methodologies that improved cost control, profitability, and client delivery. Prior to IBM, Newfield held senior security leadership roles at Cybertrust, RSA, and DDC Advocacy.

Newfield is a published author on topics related to security, a speaker on cybersecurity, and has been an instructor at the SANS Institute. In addition, he holds a Bachelor of Science degree in Industrial and Organizational Psychology from George Mason University.