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Phia Principal System Administrator-Linux in Arlington, Virginia

OVERVIEW: Would you like to work with a highly technical team, supporting the front line of security protecting the federal and civilian government in the pursuit of national cybersecurity? phia is hiring a skilled Linux System Administrator. Come join our teams working in a fast-paced environment that will challenge your technical skills. This job is located in Arlington, VA.


You will:

  • Apply current technologies to the design, development, evaluation and integration of computer information systems and networks to maintain system security.

  • Work with commercial computer product vendors in the design and evaluation of state-of-the-art secure COTS applications, operating systems, networks and database products and technology.

  • Provides security engineering and integration services to internal customers.

  • Involved in a wide range of issues including secure architectures, secure electronic data traffic, network security, information security and privacy.

  • Develop security systems for any manual or automated systems environments.

  • Responsible for ensuring the protection of company data against unauthorized disclosure, accidental or intentional loss of data, or unauthorized modification.

  • Perform configuration management using Ansible or Puppet.

  • Provide Linux-related scripting (Bash, Perl, Python, etc.).

  • Perform Apache web server configuration and management.

  • Manage, deploy and troubleshoot Java and Tomcat applications.

  • Analyze and evaluate the security of new and existing IT systems and the procedures to protect information system assets from intentional or inadvertent modification, disclosure, or destruction.

  • Analyze and evaluate the design and operating effectiveness of Information Technology and security controls that are in place.

  • Evaluate security solutions to ensure they meet security requirements for processing classified information.

  • Manage changes to system and assesses the security impact of those changes.

  • Develop and maintain technical documentation and instructions

  • Contribute to completion of project milestones under the specific guidance of program leadership

  • May lead System Administrator team and/or Help Desk team.

  • Provide technical execution oversight and training for lower level system administrators.

  • Define and implement policies and standards for allocation related to the use of computing resources.

  • Plan and implement software upgrades for Commercial Off-the-Shelf (COTS) and Government Off-the-Shelf (GOTS) software to the Change Management process.

  • Plan and conduct testing using approved testing procedures for all new staged hardware/software (GFE), as well as components that have been updated, received patches, and/or have been repaired.

  • Provide advice and training to end-users.

  • Must have a current Top Secret clearance with SCI eligibility (SSBI within the last five years) and be able to obtain DHS program suitability prior to starting employment.



  • Eight (8) or more years of system administration experience required.

  • Bachelor’s degree in Computer Science, Computer Engineering, Computer Information Systems, Computer Systems Engineering or a related discipline is required.

  • A Master’s degree in a related discipline may substitute for two (2) years of experience. A PhD may substitute for four (4) years of experience.

  • DoD 8570.1-M Compliance at IAT Level I certification required.

  • Must have a current TS Clearance with SCI Eligibility (SSBI within the last 5 years).

  • Red Hat Certified Engineer (RHCE) Required.

  • Knowledge and understanding of operating systems, networks and services.

  • Experience and/or familiarity with the following network protection devices: Firewalls, intrusion detection and prevention systems (IDS/IPS), log analysis, malware analysis, network traffic flow and packet analysis.

  • Knowledge of Red Hat version 6 or 7(rhel6/rhel7) with the ability to engineer, install, administer and maintain.

  • Strong research, analytical, and problem-solving skills.

  • Good communication skills including preparing and presenting results, findings and alternatives and influencing management decision making based on the best available data.

  • Comprehensive knowledge and understanding of best practices, trends related to information security.

  • Desired Knowledge and experience with any of the following: Apache/TomCat/NGINX, Kerberos/LDAP, SSL, IDM/Free IPA, Docker, Open Nebula, Ambari, Whois, Sourcefire, Puppet, Satellite Server, Nagios.

  • Ability to work well both independently and in a team environment as needed.

  • Experience with multi-site infrastructure deployments.


TRAVEL: Less than 5%


SECURITY REQUIREMENTS: Active Top Secret with eligibility for SCI or DHS EOD



phia, LLC is a Northern Virginia based, 8a certified small business that was established in 2011. We focus on the full spectrum of disciplines within the cyber, intelligence, and technology arenas.

We support mission-critical teams within various agencies and offices within the Federal government, including Civilian, Defense, Law Enforcement and Intel. We like to describe phia as truly by technical people and for technical people. phia’s founders wanted to create an employee-centered culture, where we care about the people as much as the mission.

Our goal is to continue to hire talented and passionate team members, who desire to grow their skillsets as well as the reputation of the company with our partners, clients and stakeholders. With this goal in mind, we invite you to apply for positions, even if you don't meet the desired years of experience listed in our position descriptions. We are more interested in intellectually curious individuals with the ability to work autonomously and with teams. If your experience does not match our exact requirements of a position but you are otherwise an awesome candidate, we will work hard to find a position that suits you.

Our company culture is unique; we consider everyone on the team a part of the “phia phamily”. We make great efforts to foster cohesiveness through one-on-one interactions, professional mentoring, and group outings. In short, our leadership team is personally invested in each employee. phia offers a rewarding environment with talented & passionate people.

phia offers excellent benefits for full time W2 candidates to enhance the work-life balance, these include the following:

  • Medical Insurance

  • Dental Insurance

  • Vision Insurance

  • Life Insurance

  • Short Term & Long-Term Disability

  • 401k Retirement Savings Plan with Company Match

  • Paid Holidays

  • Paid Time Off (PTO)

  • Tuition and Professional Development Assistance

  • Flex Spending Accounts (FSA)

  • Parking Reimbursement

  • Monthly Payroll