Linux Administrator

InquisIT LLC; Washington (District of Columbia); On-site; USD 110,000 - 165,000; Full time

Job summary

InquisIT LLC in Washington, DC is seeking a Senior Linux Administrator to provide hands-on administration, security, and engineering support for enterprise Linux environments. The focus is Red Hat Linux, automation, patching, system performance, security hardening, and maintaining highly available infrastructure across physical, virtual, and cloud environments.

The ideal candidate will bring experience with web/app technologies such as Apache Tomcat, Apache HTTP Server, nginx, HAProxy, or

Qualifications

• Bachelor's degree or equivalent experience.
• 8-10 years of related technical experience.
• Experience with RedHat Linux 8.x/9.x administration and automation.
• Experience with Oracle WebLogic 7.x.
• Experience supporting IBM middleware stack (WebSphere) and IBM Security Verify Access 10.x.
• Experience integrating middleware with Active Directory LDAPS/LDAP.
• Advanced understanding of Apache Tomcat 9.x/10.x, Apache HTTP Server, nginx, haproxy.
• Automation and scripting (Ansible, Python, Bash).

Responsibilities

• Provide operations, maintenance, and engineering support for production, development, and test systems.
• Configure, administer, and document Linux operating systems.
• Maintain availability and integrity of Linux infrastructure and IT systems.
• Ensure connectivity and functionality of systems and applications within the enterprise.
• Suggest upgrades and optimization for future needs, including consolidation and decommissioning.
• Troubleshoot and resolve issues reported by IT staff and end-users.
• Test and release changes, and monitor system performance and security posture.
• Design and implement highly available systems and services.
• Implement and maintain DISA STIG, CIS Benchmark, and NIST800.53 security baselines.

Skills

Linux administration

Automation scripting

WebLogic/WebSphere

Open Text Documentum

Monitoring dashboards

Cloud platforms (AWS/Azure)

Hardware/VM management

Active Directory integration

Python/Bash/Ansible

Education

Bachelor's degree or equivalent experience

Tools

RedHat Satellite

Ansible

Zabbix

Grafana

ElasticSearch

Splunk

Hyper-V

AWS

Azure

Job description

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With over 20 years in business, InquisIT is a high-energy, forward-thinking, advanced technology company that provides the Federal Government and select private-sector organizations with an impressive array of services and solutions. Company expertise includes Systems Engineering, Enterprise Infrastructure, Cyber Security, Management Services, and Software Support.

InquisIT’s team is seeking a Senior Linux Administrator to join us in Washington, DC.

Position Summary:

The Senior Linux Administrator will provide hands‑on administration, maintenance, security, and engineering support for enterprise Linux environments. This role focuses on Red Hat Linux, automation, patching, system performance, security hardening, and maintaining highly available infrastructure across physical, virtual, and cloud environments. The ideal candidate will also bring experience supporting web and application technologies such as Apache Tomcat, Apache HTTP Server, nginx, HAProxy, or similar platforms.

Primary Job Responsibilities:

• Provide operations, maintenance, and engineering support for production, development, and test systems
• Configure, administer, and maintain documentation for Linux operating systems
• Maintain availability and integrity of Linux infrastructure and IT systems
• Maintain connectivity and functionality of systems and applications within the enterprise
• Identify technical requirements and make recommendations for future upgrade, optimization, consolidation, and decommissioning activities
• Troubleshoot, analyze, isolate, and resolve problems reported by IT support staff and end-users
• Tests, documents, communicates, and releases changes to the enterprise
• Monitor, evaluate, and report system performance and security posture
• Designing and implementing highly available systems and services
• Implement and maintain strict security baselines on all systems (DISA STIG, CIS Benchmark, NIST800.53)

Experience and Qualifications:

• Bachelor's degree or equivalent experience
• 8-10 years of related technical experience
• Excellent written and verbal communication skills
• Experience supporting physical and virtual servers, data backup/recovery, and patch management
• Experience with RedHat Linux 8.x/9.x administration and automation
• Experience with Oracle WebLogic 7.x
• Experience supporting IBM middleware stack to include but not limited to WebSphere Application Server 9.x/Liberty (WebSphere containerization) and IBM Security Verify Access 10.x
• Experience integrating middleware components with Active Directory Lightweight Directory Services
• Advanced understanding of Apache Tomcat 9.x, Apache Tomcat 10.x, Apache HTTP Server, nginx, haproxy
• Experience installing, configuring, and managing Open Text Documentum Document Management Server
• Automation and scripting experience (e.g., Ansible, Python, Bash)
• Experience managing a complex Linux enterprise environment with Red Hat Satellite
• Strong working knowledge using tools such as Zabbix, Grafana, ElasticSearch, Splunk to monitor systems, metrics, and create actionable dashboards
• Experience deploying and maintaining virtualized environments in Hyper‑V, AWS, Azure
• Experience integrating Linux, NVIDIA GPU’s and AI‑related technologies such as Ollama, LiteLLM, guardrails.

Preferred Skills and Certifications:

InquisIT provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, sex, national origin, age, disability or genetics. In addition to federal law requirements, InquisIT complies with applicable state and local laws governing nondiscrimination in employment in every location in which the company has facilities. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation, and training.

*The above statements are intended to describe the general nature and level of work being performed by the individual(s) assigned to this position. They are not intended to be an exhaustive list of all duties, responsibilities, and skills required. Management reserves the right to modify, add, or remove duties and to assign other duties as necessary