Successfully migrated over 6 mid to large sized companies from Windows NT 4.0/Exchange 5.5 domain to Windows Server 2003/Exchange Server 2003 with Active Directory. Migrations included a 4-phased approach including Active Directory/Exchange design, implementation planning, pilot testing and implementation following MS best practices. Responsible for maintaining networks, servers, and security for mid to large sized companies. Responsibilities include log management, security analysis and remediation, firewall monitoring, management and design. Firewall expertise includes, Sonicwall (standard & enhanced OS), Cisco PIX (501-515E models, NetScreen (5XP to 25XP Models). Experience includes rule set consolidation and streamlining (simplified management and improved performance), object based rule set management, site-to-site and remote access VPN configuration, integration with Active Directory, troubleshooting, IOS/Firmware upgrades, and optimization.