System Admin Linux

Quantico, VA
Information Technology /
Regular /
Agile Defense provides leading-edge Digital Transformation solutions to support and advance our customers' mission. We deliver innovative and high-quality services to our customers worldwide through an empowered and engaged workforce.

Requisition #:SYSTE003858

Job Title: System Admin Linux

Location: 27410 Hot Patch Road Quantico, Virginia 22134 (Hybrid)

Clearance Level: Active DoD - Secret

Required Certification(s): 
DoD IAT III or IAM II Certification. (Candidate has 180 days to attain if they have a lower level 8570 certificate).
Related RHEL Certification.

The successful candidate will use their Red Hat Linux experience to support the Customer in the design and implementation of their Assured Compliance Assessment Solution (ACAS) for the Customer’s Government Enterprise Networks (GEN). The Linux Administrator will operate and maintain the infrastructure for the ACAS solution to support network and appliance scanning and configuration assessments and provide training to operators and Information Assurance personnel to maintain and operate the ACAS tool functionality.
Install and patch operating systems, application, and document Department Information Systems Agency (DISA) Security Technical Implementation Guidelines (STIGs) applicable to each network environment for all ACAS implementations.
Assesses current ACAS implementations for each of the GEN networks and recommend changes.
Document the steps required to design the ACAS solution for each of the GEN networks to include IP address, Fully Qualified Domain Name, and physical location of each component.
Create network diagrams of the designs with Microsoft Visio (include list of hardware and software requirements).
Maintains the Nessus scanners and Passive Vulnerability Scanner’s (PVS) connectivity with the associated Security Center (SC).
Develop and/or update the Standard Operating Procedures (SOP) to support each of the client ACAS solutions documented within the SharePoint portal.
Provide reports as necessary.
Build Linux Server from DISA provided ISO image.


Required Certifications
DoD 8570 IAT III or IAM II (CASP+, CCNP Security, CISA, GSE, SCNA, CISSP [or Associate], CAP, GSLC, CISM, GCED, GCIH, CISO, or HCISPP). Candidate has 180 days to attain if they have a lower level 8570 certificate.
Related RHEL certification

Education, Background, and Years of Experience
Knowledge and experience with RedHat Linux. Possesses understanding and experience with common cybersecurity toolsets and processes to include STIGs, CAS, IAVA Management and Implementation, and Operation Order (OPORD)/Fragmentary Order (FRAGO) support.
3+ years’ experience in supporting, configuring, administering Linux.
3+ (RHEL) operating system in an enterprise environment RHEL 7.x or greater.
Experience with virtualized environments (vSphere, ESXI).


Required Skills
Red Hat Enterprise Linux (RHEL) experience.
Must be able to troubleshoot SSH connection issues.
Good understanding of LVM Partitioning, Disk space and troubleshooting Systems related issues.
Familiar with VMware and vSphere.
Understanding of SSL/TLS Certificate and OS hardening.
Strong understanding of Network configuration and troubleshooting (nmtui, nmcli, service, netstat, grep, top command).
Understanding of patching and RPM package management is a must.
Be able to troubleshoot Kernel Panic, Root and Grub password Reset, & Firewall configurations.
Familiar with Ansible, Ansible-playbook and ansible roles.

Preferred Skills
Understanding on Redhat Satellite Version 6.12 or higher.
Familiar with Active Directory Concepts, LDAP, or Kerberos.
Familiar with migration from RHEL7 to RHEL8 using Leapp utility.
Build or configure new YUM Repositories for patching purposes.
Familiar with AWS/AZURE Cloud for future projects.
Scripting (Nessus Attack Scripting Language (NASL), Python, Bash) .
Engineering experience with Nessus Manager and Monitor Implementation.
Able to spin new instance on the cloud from a given AMI or Launch Template.
Understand the concept of Security Groups, VPC, IAM, Autoscaling, Load Balancer Container architecture.


Environmental Conditions
Contractor site with 0%-10% travel possible. Possible off-hours work to support releases and outages. General office environment. Work is generally sedentary in nature but may require standing and walking for up to 10% of the time. The working environment is generally favorable. Lighting and temperature are adequate, and there are not hazardous or unpleasant conditions caused by noise, dust, etc. Work is generally performed within an office environment, with standard office equipment available.
Hybrid, Once Team is fully staffed, Govt is expected to grant 1 day/week of telework. Situational telework is also allowed on a case-by-case basis. Personnel must have accounts and be operationally functional before they can telework (about 2 months from start date).

Strength Demands
Sedentary – 10 lbs. Maximum lifting, occasional lift/carry of small articles. Some occasional walking or standing may be required.   Jobs are sedentary if walking and standing are required only occasionally, and all other sedentary criteria are met.

Physical Requirements
Stand or Sit; Walk; Repetitive Motion; Use Hands / Fingers to Handle or Feel; Stoop, Kneel, Crouch, or Crawl; See; Push or Pull; Climb (stairs, ladders) or Balance (ascend / descend, work atop, traverse).
Employees of Agile Defense are our number one priority, and the importance we place on our culture here is fundamental. Our culture is alive and evolving, but it always stays true to its roots. Here, you are valued as a family member, and we believe that we can accomplish great things together. Agile Defense has been highly successful in the past few years due to our employees and the culture we create together. We believe several attributes are the root of our very best employees and extraordinary culture. We have named these attributes “The 6 H’s” – Happy, Helpful, Honest, Humble, Hungry, and Hustle.

Happy: We exhibit a positive outlook in order to create a positive environment.
Helpful: We assist each other and pull together as teammates to deliver.
Honest: We conduct our business with integrity.
Humble: We recognize that success is not achieved alone, that there is always more to learn, and that no task is below us.
Hungry: We desire to consistently improve.
Hustle: We work hard and get after it.

These Core Values are present in all our employees and our organization's aspects. Learn more about us and our culture by visiting us here.

COVID-19 Vaccination Requirements
Agile Defense is subject to federal vaccine mandates or other customer/facility vaccination requirements as a federal contractor. As such, to protect its employees' health and safety and comply with customer requirements, Agile Defense may require employees in certain positions to be fully vaccinated against COVID-19. Vaccination requirements will depend on the status of the federal contractor mandate and customer site requirements.

Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities
The contractor will not discharge or in any other manner discriminate against employees or applicants because they have inquired about, discussed, or disclosed their own pay or the pay of another employee or applicant. However, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or (c) consistent with the contractor’s legal duty to furnish information. 41 CFR 60-1.35(c)