Linux Middleware Systems Administrator (Remote - Occasional Office Visits Requir

Overview
About Unison :

Unison ’s products power the business of government to work smoother and smarter, making critical federal processes and acquisitions simpler and more effective. Trusted by over 200,000 federal employees and government contractors, our AI-infused software and deep domain expertise help contract shops, cost engineers, 1102s, program managers, and budgeting professionals cut through friction, keep compliance airtight, and sharpen decisions. Our federal focus brings efficiency, transparency, and clarity to complex data, regulations, and workflows, empowering agencies and executives to spend more minutes on mission and achieve strategic objectives. Unison is how federal business gets done.

Role Overview: Unison is seeking a Linux Middleware Systems Administrator to support Linux servers, middleware platforms, Talend services, SOA integrations, and database-connected applications in hosted SaaS environments.

This role is responsible for maintaining stable, secure, and available Linux and middleware systems. The position will support administration, patching, monitoring, troubleshooting, production support, deployments, and operational documentation.
Responsibilities
Linux / Middleware Administration

- Administer, configure, patch, troubleshoot, and maintain Linux servers, primarily Red Hat Enterprise Linux and similar distributions.

- Support Linux server builds, system baselines, hardening, vulnerability remediation, documentation, and operational procedures.

- Support middleware platforms for application integration, SOA services, APIs, web services, data movement, and batch processing.

- Support Talend components including TAC, JobServers, Runtime, ESB, Tomcat, and Karaf.

- Monitor, troubleshoot, patch, upgrade, deploy, restart, and validate Talend jobs, routes, schedules, logs, runtime services, and middleware components.

- Troubleshoot issues involving connectivity, credentials, permissions, APIs, databases, Java, memory, certificates, and configuration settings.

Operation Support

- Respond to production alerts, outages, Talend failures, Linux issues, middleware incidents, and database connectivity problems.

- Support middleware, Talend, and application connectivity to PostgreSQL, Oracle, and MySQL.

- Troubleshoot database issues involving JDBC drivers, connection strings, ports, credentials, certificates, firewalls, DNS, and service accounts.

- Work with DBA, Hosting, Development, Security, and Support teams to resolve incidents, performance, access, patching, backups, and maintenance.

- Participate in on-call and after-hours production support as needed.

- Follow change management procedures for changes, patches, deployments, configuration updates, and emergency fixes.

Qualifications
Qualifications:

- 5+ years of Linux systems administration experience in a production, SaaS, hosting, or enterprise environment.

- Strong hands-on experience with Red Hat Enterprise Linux or similar enterprise Linux platforms.

- Experience supporting middleware, Talend, SOA services, APIs, web services, or application integration platforms.

- Experience with Apache Tomcat, Apache Karaf, Java runtime services, or similar middleware components.

- Experience troubleshooting PostgreSQL, Oracle, and MySQL database connectivity.

- Working knowledge of TCP/IP, DNS, firewalls, ports, load balancers, VPN, and basic network troubleshooting.

- Experience with patching, vulnerability remediation, system hardening, and operational maintenance.

- Ability to use logs and monitoring tools to investigate system, middleware, Talend, and database connectivity issues.

- Strong troubleshooting, documentation, and communication skills.

- Ability to work independently and with cross-functional technical teams.

- Willingness to participate in on-call rotation and production support.

- Bachelor's degree in Information Technology, Computer Science, Engineering, or a related field preferre