David O'Brien

David O'Brien is a seasoned IT professional with extensive experience in system administration and cyber security. Currently serving as a System Administrator at D2 Consulting since July 2023, David previously worked at 22nd Century Technologies Inc. as a Windows Subject Matter Expert, where significant contributions included creating a Standard Operating Procedure for Active Directory Failover. David's experience encompasses roles at Baron Enterprises as a Cyber Security Consultant, ECS Tech. as a System Administrator, and multiple positions at ManTech International Corporation as a Senior Cyber Security Engineer, where responsibilities ranged from building virtual environments to managing Active Directory infrastructure. Earlier roles included managing service delivery at Accenture Federal Systems and conducting vulnerability scans at Chenega Technical Innovations. David possesses a solid foundation in Windows server management, cyber security tools, and operational task management, coupled with a commitment to improving system reliability and security protocols.