Bash Scripting, CentOS, Cloud Computing, Computer Security, Concurrent Versions System (CVS), Csh (C Shell) Scripting, DCID - Director of Central Intelligence Directive, DNS (Domain Name System), Debugging Skills, Docker, Emerging Technology, Enterprise Directory Services, Git, IP Addressing, International Classification of Diseases (ICD), LDAP (Lightweight Directory Access Protocol), Linux Operating System, Microsoft Active Directory, Multicast, NAT (Network Address Translation), NFS (Network File System), NIS (Network Information Service), Network Switching, Operating Systems, Performance Analysis, Performance Tuning/Optimization, Perl Programming Language, Python Programming/Scripting Language, Red Hat Linux Operating System, Ruby, Scripting (Scripting Languages), Source Code Control System (SCCS), Subversion, Systems Engineering, Systems Maintenance, Top Secret Clearance, Virtualization, iptables