Senior Linux/Network Administrator

Job Description
The selected candidate will be responsible for performing daily system administration and O&M support activities in support of a complex network environment with geographically distributed systems. The position entails supporting system engineering requests to meet operational needs, as well as engineering, deploying, and maintaining capabilities that are new to the environment.
Primary Responsibilities
The selected candidate will be responsible for monitoring test infrastructure systems, applications, and processes; and for ensuring that all issues are identified, tracked, and resolved in a timely manner. She/he will provide support for server/router/firewall configuration and will perform security management and application performance optimization functions. The environment includes Microsoft-based servers, databases, and workstations as well as VMware and Linux server instances and an extensive network infrastructure (LAN and WAN). Additional responsibilities include:
· Maintaining a complex server-based enclave, including performing system scans, vulnerability management activities, and active directory configuration.
· Planning and implementing IT enhancements and undertaking project work.
· Identifying and correcting hardware and software issues.
· Responding to system administration, operations, and maintenance problems while off duty, on an on-call basis.
· Utilizing enterprise monitoring solutions to identify alarms that have been triggered against the test infrastructure environment.
· Providing timely and professional support in response to calls and emails.
· Proactively contacting customers when test infrastructure processes are significantly delayed or may impact their ability to complete a business function on time.
· Participating in the creation and ongoing maintenance of documentation ensuring that clear, concise, and accurate information is readily available to assist with incident resolution.
· Providing technical assistance to companion work groups in support of overlapping projects and maintaining good inter-departmental relations.
· Communicating with users and publishing status of any system outages, as needed.
· Executing the process for managing information assurance vulnerability alerts (IAVAs) and system security scanning for equipment suites in accordance with the System Security Plans for these systems in order to rapidly and accurately identify and remediate IAVAs.
· Initiating IAVA responses and system security scans, completing remediation, extending IAVA patches and security updates to designated sites, and executing monthly security scans.

Required Education, Experience, & Skills
· At least 7 years of experience providing support for users and systems in Information Technology and/or information security environments.
· At least 2 years of experience with Linux server administration (RHEL and/or CentOS) in an enterprise environment (including both hardware installs and virtual machines).
· At least 2 years of experience with network switches, routers, and firewalls from Cisco, Juniper, or similar enterprise vendors.
· Must have experience in or familiarity with the following systems: Windows/Linux operating systems, VMware, and Networking: Switches, Routers, LANs, & cabling.
· Must have a solid understanding of advanced security protocols and standards, and information security principles and practices.
· Must have in-depth experience with software and security architectures.
· Must have experience providing assistance to users, optimizing system operations, and monitoring IT enterprise systems.
· Must possess strong analytic abilities and must be meticulous and careful in their work.
· Must be an independent thinker capable of working proficiently independently as well as within a team.
· Must be committed to adopting and adhering to best practices including compliance with maintenance windows and change control procedures.
· May be asked to perform short duration travel to non-hostile CONUS locations for tasks such as system upgrades and installs.

Preferred Education, Experience, & Skills
· Bachelor's Degree in a technical field.
· Experience documenting and providing information for security accreditation and certification.
· Experience with Network Security Technologies (e.g. Multiple Domain, PKI, SSP, Vulnerability Assessment).
· Experience with High Assurance Internet Protocol Encryptor (HAIPE) devices for In-line Network Encryption.
· Experience with a variety of switches, firewalls, and network load balancers in an enterprise network environment.
· Experience in a System Administration role supporting a software configuration management and development environment.

About BAE Systems Intelligence & Security
BAE Systems, Inc. is the U.S. subsidiary of BAE Systems plc, an international defense, aerospace and security company which delivers a full range of products and services for air, land and naval forces, as well as advanced electronics, security, information technology solutions and customer support services. Improving the future and protecting lives is an ambitious mission, but it's what we do at BAE Systems. Working here means using your passion and ingenuity where it counts - defending national security with breakthrough technology, superior products, and intelligence solutions. As you develop the latest technology and defend national security, you will continually hone your skills on a team-making a big impact on a global scale. At BAE Systems, you'll find a rewarding career that truly makes a difference.

Intelligence & Security (I&S), based in McLean, Virginia, designs and delivers advanced defense, intelligence, and security solutions that support the important missions of our customers. Our pride and dedication shows in everything we do-from intelligence analysis, cyber operations and IT expertise to systems development, systems integration, and operations and maintenance services. Knowing that our work enables the U.S. military and government to recognize, manage and defeat threats inspires us to push ourselves and our technologies to new levels.

At BAE Systems, we celebrate the array of skills, experiences, and perspectives our employees bring to the table. For us, differences are a source of strength. We're laser-focused on high performance, and we work hard every day to nurture an inclusive culture where all employees can innovate and thrive. Here, you will not only build your career, but you will also enjoy work-life balance, uncover new experiences, and collaborate with passionate colleagues.