Linux Systems Administrator

At Criterion Systems, we developed a different kind of business—a company whose real value is a reputation for excellence built upon the collective skills, talents, perspectives, and backgrounds of its people. By accepting a position with Criterion Systems, you will join a group of professionals with a collaborative mindset where we share ideas and foster professional development to accomplish our goals. In addition to our great culture, we also offer competitive compensation and benefit packages, company-sponsored team building events, and advancement opportunities. To find out more about how Criterion can help you take your career to the next level please visit our website: www.criterion-sys.com. Criterion Systems is a Military/Veteran Friendly Company therefore we encourage Veterans to apply.

We are seeking a mission-focused Linux Systems Administrator to support and contribute to our government customers' success in San Diego, California!

***ACTIVE SECURITY CLEARANCE REQUIRED***

In this role, you will work as part of a team supporting customers, designing, implementing, and managing lab infrastructure to meet the customer requirements. You will build, configure, administer, and troubleshoot Linux servers and user workstation hardware and software; design and implement work-group-scale networks; build and manage authentication, file-share, and other collaboration servers to support groups of heterogeneous client systems. You will work with cyber security staff to develop and apply hardening steps for systems for classified use to ICD-503 security controls, and other customer standards. Document system configuration for new and existing systems.

Experience with centralized authentication technologies such as LDAP and Active Directory domains in supporting (Windows/Linux) cross-platform clients is desirable.

Duties, Tasks & Responsibilities

• Pro-actively maintain and develop all Linux infrastructure technology to maintain a 24x7x365 uptime service
• Engineering of systems administration-related solutions for various project and operational needs
• Maintain best practices on managing systems and services across all environments
• Fault finding, analysis and of logging information for reporting of performance exceptions
• Pro-actively monitoring system performance and capacity planning
• Manage, coordinate, and implement software upgrades, patches, hot fixes on servers, workstations, and network hardware
• Create and modify scripts or applications to perform tasks
• Provide input on ways to improve the stability, security, efficiency, and scalability of the environment
• Collaborate with other teams and team members to develop automation strategies and deployment processes

Required Experience, Education, Skills & Technologies

• An active TS/SCI security clearance, preferably with CI polygraph
• Bachelor’s degree in computer science, information technology, engineering, or a technical discipline
• Five (5) years of experience working as a Linux Administrator
• In depth knowledge of Linux: RedHat, CentOS, Debian, etc.
• Familiarity with VMWare and virtualization concepts and/or Docker or Podman Containers.
• Experience with Shell, Perl, and/or Python scripting.
• Strong knowledge of protocols such as DNS, HTTP, LDAP, SMTP and SNMP.
• Knowledge of existing virtual machine and cloud technologies including principles and methods of scalability to match workloads.
• Knowledge of multiple specialties such as operating systems, database platforms, storage technologies, including knowledge of administering operating systems like Red Hat Enterprise Linux and Microsoft Server.
• Demonstrated experience working on remote Systems via use of command line.
• Hands on experience integrating Linux servers in Active Directory (or using LDAP/Kerberos).
• Experience installing and configuring basic services including httpd/Apache, vftpd and sshd.
• Ability to arrange things or actions in an order or pattern according to a specific rule or set of dependencies.
• Experience with operating system update services such as WSUS, YUM or DNF.
• Knowledge of the following technologies: Ansible modules, PowerShell scripting, ELK Stack and Trellix Anti-Virus and integrating Linux with Windows Active Directory.
• Ability to work well as a member of a team and independently.
• Strong problem solving and communication skills.

Preferred Experience, Education, Skills & Technologies

• Experience with enterprise level Windows Server operating environments, including Windows Active Directory, Group Policy Management, SharePoint, Exchange services.
• Experience with monitoring solutions like ELK Stack.
• Amazon Web Services (AWS): EC2, S3 and EFS storage.
• DevOps and/or DevSecOps experience.
• Experience with implementing Ansible modules and configuration management with Git.
• Parallel system architectures, designing for high availability, performance benchmarking, multi-level security, STIG hardening and compliance, encryption in motion, data at rest encryption, software designed data center (SDDC).
• Experience with Agile design methodologies.
• Knowledge of encrypted communications and information security / assurance / cyber policies and procedures.

Security Clearance Level

• TS/SCI with an adjudicated CI polygraph or ability to obtain a CI polygraph

Certification

• One or more of the following: Linux+, RHCE, RHCSA, Enterprise Linux Professional Certification (LPIC- 1, LPIC- 2, LPIC- 3)

Work Schedule

• Full-time on-site at a designated facility.

Pay Rate

• The projected compensation range for this position is $135,000 - $170,000. Please note that the salary information is a general guideline only. Criterion Systems considers factors such as (but not limited to) scope and responsibilities of the position, candidate's work experience, education/ training, key skills as well as market and business considerations when extending an offer.

Benefits Offered

• Medical, Dental, Vision, Life Insurance, Short-Term Disability, Long-Term Disability, 401(k) match, Tuition/Training Assistance, Parental Leave, Paid Time Off, and Holidays.

Criterion Systems, LLC. and its subsidiaries are committed to equal employment opportunity and non-discrimination at all levels of our organization.  We believe in treating all applicants and employees fairly and make employment decisions without regard to any individual’s protected status:  race, ethnicity, color, national origin, ancestry, religion, creed, sex/gender, gender identity/gender expression, sexual orientation, physical and mental disability, marital/parental status, pregnancy (including childbirth, lactation, and related medical conditions), age, genetic information (including characteristics and testing), military and veteran status, or any other characteristic protected by law. For our complete EEO/AA and Pay Transparency statement, please visit https://careers-criterion-sys.icims.com/.