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Linux Security Engineer
Columbia, South Carolina  |  Onsite
Contract Position
It appears that you have already applied to this job.
Applied on January 28, 2022
Job Id #52871 Posted December 21, 2021

Linux Security Engineer


  • Linux/UNIX o/s experience
  • RHEL environment experience
  • Understanding of essential network services such as DNS, SMTP, NTP, and SNMP
  • Knowledge of syslog collection
    Knowledge of SIEM (QRadar, Splunk, etc.) infrastructure and appliances
  • Background/Drug/Vaccination required

Job Description:

  • Administration of Snort Sensors
  • Ability to tune, configure and implement detection logic in open source Snort Sensors
  • Supports customers at the highest levels in the development and implementation of doctrine and policies
  • Applies know-how to government and commercial common user systems, as well as to dedicated special purpose systems requiring specialized security features and procedures
  • Performs analysis, design, and development of signature for the IDS sensors
  • Analyzes security requirements for the management and administration of sensing technology
  • Designs, develops, engineers, and implements solutions that meet security requirements (relating to sensing solutions)
  • Analyzes general information assurance-related technical problems and provides basic engineering and technical support in solving these problems
  • Evaluate that all information systems are functional and secure
  • Occasionally provide security engineering and integration services to internal customers
  • Deploy new sensors for monitoring network traffic flow
  • Installation, configuration, support and security implementation of tools & services related to SSH
Required Skills:
  • Installation, configuration, maintenance and troubleshooting of RHEL based systems Strong troubleshooting skills of Linux/UNIX operating systems Previous working experience as a Linux System Administrator for 6+ years Understanding of essential network services such as DNS, SMTP, NTP, and SNMP Experience with databases such as SQL, Postgres, MySQL, Experience maintaining compliance of RHEL based systems using STIGS or CIS Day to day support operations maintaining security patches on all RHEL based systems
  • Scripting and automation using tools such as Ansible, Terraform, GitLab, etc. Experience with Containers, RedHat platforms Understanding of Linux based Networking Knowledge of syslog collection Knowledge of SIEM (QRadar, Splunk, etc.) infrastructure and appliances Time and project management skills, with the capability to prioritize and multitask as needed Solid team player with leadership skills

Preferred Qualifications:

  • Red Hat Certification System Administrator / Engineer
  • Shell, Python Scripting
  • Linux+ Certified

Roles and Responsibilities:

  • Have some working administrative knowledge using IT security technology such as Snort, SourceFire, and Firepower
  • Orchestrating deployments of custom CentOS 7 servers
  • Apply recommended OS Patches, Kernel upgrades to keep server operating systems up to date
  • Automation of repeatable tasks with the help of scripting (Python/Ansible preferred)
  • Troubleshooting of Linux Servers and applications beyond the basics
  • Developing strategies to improve operational workflow
  • Updating security tools on Linux systems
  • Basic knowledge of relational databases such as MySQL and PSQL
  • Asses existing network sensing topology and identify key system flaws
  • Configuring and deploying new open-source and commercial security tools on Linux systems
  • Performed DAST analysis using Application Scan security vulnerability tool to identify OWASP issues
  • Provide recommendations to overall system deployment and design
  • Perform administrative and engineering work on Security Operation Center tools such as Remedy, Service manager, Symantec Antivirus, etc
  • Develop detailed supporting documentation regarding technical projects (such as materials to support an architecture review board)
  • Provide recommendations on collection, processing and distribution systems in the cyber security market
  • Manage customer expectation and attend all mandatory review / regulatory discussions related to the specific project being delivered
  • Strong problem solving skills with focus on strategy

Horizontal is proud to be an Equal Opportunity and Affirmative Action Employer. We seek to provide employment opportunities to talented, qualified candidates regardless of race, color, sex/gender including gender identity and/or expression, national origin, religion, sexual orientation, disability, marital status, citizen status, veteran status, or any other protected classification under federal, state or local law.

In addition, Horizontal will provide reasonable accommodations for qualified individuals with disabilities. If you need to request a reasonable accommodation in order to complete the application or interview process, please contact

All applicants applying must be legally authorized to work in the country of employment.


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You are considered to have a disability if you have a physical or mental impairment or medical condition that substantially limits a major life activity, or if you have a history or record of such an impairment or medical condition.

Horizontal is proud to be an Equal Employment Opportunity/Affirmative Action Employer providing a drug-free workplace.


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