Unix Systems Administrator - Herndon, VA


Cogent Communications is a multinational, Tier 1 facilities-based ISP, consistently ranked as one of the top five networks in the world and is publicly traded on the NASDAQ Stock Market under the ticker symbol CCOI. Cogent specializes in providing businesses with high speed Internet access and Ethernet transport services. Cogent's facilities-based, all-optical IP network backbone provides IP services in over 218 markets globally. Since its inception, Cogent has unleashed the benefits of IP technology, building one of the largest and highest capacity IP networks in the world. This network enables Cogent to offer large bandwidth connections at highly competitive prices. Cogent also offers superior customer support by virtue of its end-to-end control of service delivery and network monitoring. Cogent offers competitive compensation and a full benefits package that takes effect within 30 days of employment. Matching 401k and stock options are also included.

The Unix Systems Administrator is responsible for maintaining the operations status of Unix systems and will work closely with other members of the Information Technology Team (Network, Software Development, Help Desk) within Cogent. The individual will perform administration and maintenance for hardware and software that manages content and deployments for a global IT environment. Additionally, the candidate will assist with installation and support of Cogent’s Managed Services product (Utility Computing).

Essential Duties and Responsibilities:

  • Perform the daily activities of configuration and operation of systems running Linux operating systems, including Red Hat Enterprise Linux/CentOS, Debian and Ubuntu.
  • Analyze and optimize system operation and resource utilization; perform system capacity analysis and planning.
  • Execute the daily activities of System Administration for the various web development and deployment systems supporting Cogent and Cogent customers.
  • Implementation of security processes and procedures to protect network and operating systems from vulnerabilities.
  • Provide assistance to users in accessing and using Cogent systems, including Cogent’s Utility Computing customer base.
  • Install hardware (servers, disk drives, RAM, etc.) and coordinate with Field Engineers performing non-local installs. Under general supervision, performs software installations, security updates, and upgrades to operating systems and layered software packages.
  • Support 24/7 operations including periodic on-call rotation.
  • Maintains systems in accordance with established IT policies and procedures.
  • Monitors and tunes the system to achieve optimum performance levels.
  • Ensures server data integrity by evaluating, implementing, and managing appropriate software and hardware solutions.
  • Conducts hardware and software audits of workstations and servers to ensure compliance with established standards, policies, and configuration guidelines.
  • Implements and promotes standard operating procedures.
  • Ability to write scripts in some administrative language (shell scripting, Perl, PHP, etc.)


  • Computer Science or related bachelor’s degree and 5 years of relevant IT experience
  • Experience installing and maintaining Dell Hardware
  • Red Hat/CentOS 6, 7, 8
  • Experience with Apache HTTP, MySQL, and PHP
  • Automation tools such as Ansible
  • Experience with monitoring packages such as Nagios, Icinga, or Xymon
  • Knowledge to design and maintain Unix/Linux core services
  • Project Management skills to build and manage projects directly
  • Ability to write scripts in some administrative language (bash, perl, python)
  • Outstanding customer service and time management skills
  • Assist with the management of vendor relationships and negotiations
  • Strong interpersonal, communication and organizational skills
  • Capable of writing and presenting detailed documentation

Physical Requirements:

  • Frequently remains in a sitting/stationary position during the work day
  • Operates a computer and performs desk-based computer tasks continually; frequently viewing a computer screen
  • Regularly lifting, carrying, pushing, pulling objects and/or equipment that weighs up to 50 pounds

To apply for the position, please submit your resume to This email address is being protected from spambots. You need JavaScript enabled to view it..

Cogent Communications is an Equal Opportunity Employer.