Unix/Linux System Administrator

Company Overview

At 4A Consulting, we turn complexity into opportunity. Founded in 2014 and headquartered in Baltimore, MD, we are a women-owned, boutique consulting firm specializing in delivering innovative, data-driven solutions to both the Federal Government and Fortune 500 clients. Our team blends deep industry knowledge with advanced technologies to design tailored strategies that drive measurable and sustainable outcomes. We pride ourselves on an agile, collaborative approach that helps organizations navigate challenges and seize emerging opportunities in a rapidly evolving digital landscape. At 4A, we don’t just deliver projects, we build trusted partnerships that empower our clients to lead with confidence in the digital age.

Position Overview

We are seeking a Unix/Linux System Administrator to design, implement, maintain, and support highly available and scalable enterprise infrastructure environments. The successful candidate will have strong experience managing UNIX/Linux systems, server and containerized environments, SAN storage, and SAN Fabric switches across diverse infrastructure platforms.

This role involves developing infrastructure designs and documentation, maintaining system configurations, supporting enterprise system resiliency, and collaborating with technical teams to ensure secure, reliable, and high-performing IT environments.

Key Responsibilities

• Design, configure, implement, and maintain UNIX/Linux infrastructure environments.
• Develop system design specifications that meet infrastructure, operational, security, and availability requirements.
• Prepare general and detailed infrastructure designs, evaluating alternative approaches where appropriate.
• Develop specifications for servers, operating systems, storage, networks, security systems, databases, and communication systems.
• Create structured diagrams and technical documentation for infrastructure, network, storage, and security environments.
• Compile, maintain, and document system configurations, including servers, operating systems, monitoring tools, utilities, and communication systems.
• Develop and maintain operational, installation, configuration, and support procedures.
• Establish guidelines and upgrade procedures for operating systems, hardware, network systems, security systems, and client-server environments.
• Design, test, and maintain highly available and resilient enterprise infrastructure environments.
• Support infrastructure enhancements, upgrades, changes, and implementation activities in collaboration with technical teams.
• Design and maintain system monitoring, audit trails, logging, and security mechanisms.
• Provide technical assistance and escalation support for complex infrastructure, system, database, and IT issues.
• Troubleshoot and resolve system performance, availability, configuration, and integration issues.
• Perform infrastructure testing, evaluation, and validation to ensure operational readiness.
• Implement, configure, and maintain SAN storage and SAN Fabric environments across multiple storage platforms.
• Collaborate with infrastructure engineers, system administrators, developers, support teams, and other stakeholders.
• Maintain accurate technical, operational, and user documentation.

Required Qualifications

• 4+ years of professional experience in infrastructure administration, systems administration, or a related IT field.
• Strong hands-on experience building, configuring, and supporting highly available and scalable infrastructure environments.
• Strong experience managing and maintaining UNIX/Linux operating systems.
• Experience supporting Linux server and containerized environments.
• Experience with infrastructure design, configuration management, and enterprise systems support.
• Experience designing or supporting three-tier infrastructure architectures.
• Experience with SAN storage and SAN Fabric switches across multiple storage platforms.
• Experience developing and maintaining technical, operational, installation, and user documentation.
• Understanding of infrastructure availability, resiliency, monitoring, security, and performance requirements.
• Strong troubleshooting, analytical, communication, and technical documentation skills.

Preferred Qualifications

• Experience supporting large-scale enterprise UNIX/Linux environments.
• Experience with high-availability, disaster recovery, and infrastructure resiliency solutions.
• Experience with container platforms and containerized infrastructure.
• Experience with SAN administration, storage provisioning, and storage connectivity.
• Experience with infrastructure monitoring, logging, and system performance analysis.
• Familiarity with automation, scripting, and configuration management tools.
• Experience working in structured IT operations, change management, and support environments.

Why Join 4A

• Be part of a mission-driven, women-owned consulting firm with a reputation for excellence.
• Work on high-impact projects across federal and commercial clients.
• Collaborate in an inclusive, growth-oriented culture where innovation is valued.
• Access career development programs, mentorship, and learning opportunities.
• Enjoy a comprehensive benefits package, flexible work options, and a focus on work-life balance.

Equal Opportunity Statement

4A Consulting is an Equal Opportunity Employer committed to an inclusive hiring process. Applicants requiring a reasonable accommodation due to a disability may contact [email protected]. This email is intended solely for accommodation requests.

Please note that 4A Consulting participates in the federal E-Verify program. Upon hire, we will provide the federal government with your Form I-9 information to confirm that you are authorized to work in the US. 4A Consulting will only use E-Verify once you have accepted a job offer and completed the Form I-9.