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CACI International OS System Administrator in Fort Belvoir, Virginia

OS System Administrator

Job Category: Information Technology

Time Type: Full time

Minimum Clearance Required to Start: None

Employee Type: Regular

Percentage of Travel Required: None

Type of Travel: None

What You’ll Get to Do:

The desired candidate will work as an OS System Administrator part of an Oracle E-Business Suite (EBS) R12 integrated project team supporting a Department of Defense (DoD) multi-Agency program. As an experienced professional in CACI's growing Business and Information Technology Solutions (BITS), the candidate will be part of a team where complex problem solving, and communication skills are critical to success. This environment provides an unparalleled opportunity to grow and advance, while changing the way the government delivers software applications. The candidate will apply architectural and software engineering expertise to lead in the planning, design, delivery, and validation of an Oracle EBS ERP shared-service solution.


  • Provide Tier II support of IT infrastructure systems and custom mission applications based on a mixed Linux and Windows environment

  • Create, manage, and maintain accounts and group membership in Active Directory, LDAP, TACACS, KVM

  • Manage Windows-based virtual server environments

  • Responsible for pro-active systems monitoring and evaluation of environments using Tivoli / Nagios and the documentation, resolution, or escalation of any problems discovered with Oracle Support

  • Responsible for daily OS level backup monitoring and troubleshooting using Symantec NetBackup

  • Linux and Windows patching in an operational environment

  • Support Oracle Cluster File System (OCFS2 Shared file system)

  • Ensure all Linux and Windows-based systems are running current versions of antivirus software with current virus definition files; Experience with ClamAV and Windows EPO is a plus

  • Common Vulnerability and Exposure lookup

  • Work with systems engineers and vendor support for troubleshooting and resolution of system anomalies.

Required Skills:

  • Bachelor’s degree or equivalent, with seven years of related work experience

  • Experience installing and configuring various COTS products

  • Experience with Oracle OCI

  • Experience providing physical and virtual support, maintenance, and security for Red Hat (RHEL 5,6, & 7), Oracle Linux (6.x & 7.x), Windows Server 2008 & 2016, and Windows 7/10 Desktop

  • Experience with Nagios, Active Directory, NetBackup

  • Experience with Authentication and Account Management (Active Directory, DNS, LDAP, TACACS, Local, KVM)

  • Experience with virtualization (VMWare, ESXi, VCenter)

  • Experience with SAN (EMC, NAS/DAS), Oracle Cluster File System (OCFS2 Shared file system)

  • Hardware experience: servers, workstations, peripherals, tape robots

  • Database experience: Oracle, SQL Server

  • DoD 8570 IAT Level II certification (i.e., OCI Foundations 2020, Linux+, RH SA, Security+ CE)

  • Must be a U.S. Citizen and able to obtain an IT-I background investigation.

Desired skills:

  • Experience with real-time operations/mission systems

  • Experience with Automation Concepts (Puppet)

  • Experience with Splunk, WebLogic, High-Speed Guards, F5 Load Balancers

  • Familiarity with Cisco switches and firewalls

  • Experience with Oracle and SQL server database queries and troubleshooting

  • Familiarity with Tape Library/ Backups (Symantec NetBackup)

  • Experience scripting and coding (Bash, PowerShell, Python)

  • Experience with Docker.

What We Can Offer You:

  • We’ve been named a Best Place to Work by the Washington Post.

  • Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives.

  • We offer competitive benefits and learning and development opportunities.

  • We are mission-oriented and ever vigilant in aligning our solutions with the nation’s highest priorities.

  • For over 55 years, the principles of CACI’s unique, character-based culture have been the driving force behind our success.

Company Overview: At CACI, you will have the opportunity to make an immediate impact by providing information solutions and services in support of national security missions and government transformation for Intelligence, Defense, and Federal Civilian customers. CACI is an Equal Opportunity Employer – Females/Minorities/Protected Veterans/Individuals with Disabilities.

Pay Range: The proposed salary range for this position is $79,000-$161,900. There are a host of factors that can influence final salary including, but not limited to, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, geographic location, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. Employment benefits include health and wellness programs, income protection, paid leave and retirement and savings.

As a federal contractor, CACI is subject to any federal vaccine mandates or other customer vaccination requirements. All new hires are required to report their vaccination status.