Senior System Administrator (DISA)

horizonindustrieslimited; United States; Remote; USD 120,000 - 165,000; Full time

Benefits offered by this job

Healthcare package

401(k) plan with immediate vesting and

Educational assistance

Student loan repayment program

Gym reimbursement

Paid time off

Job summary

Horizon Industries Limited is seeking a Senior System Administrator to support a Defense Information Systems Agency (DISA) engagement. This remote role focuses on administering middleware-heavy enterprise applications across large-scale environments, with hands-on responsibility for deployment, tuning, and security operations.

You will work across multiple operating systems, lead deployments, ensure security hardening, and collaborate with cross-functional teams on complex information-processing

Qualifications

• Active Secret clearance required.
• 10+ years of specialized experience in information processing, with hands-on work installing, configuring, maintaining, and resolving software issues.
• 5+ years of progressive experience administering middleware solutions, such as JBoss Fusion Middleware.
• At least 3 years of hands-on experience with application deployment, testing, tuning, and security.

Responsibilities

• Administer and operate large-scale enterprise applications across multiple operating systems and supporting tooling.
• Install, configure, maintain, and troubleshoot middleware platforms such as JBoss Fusion Middleware in production environments.
• Lead application deployment, testing, tuning, and security hardening efforts.
• Contribute to at least two large-organization projects responsible for administering, operating, maintaining, and securing enterprise-scale applications.
• Collaborate across multidisciplinary teams on complex information processing initiatives.

Skills

System administration

Security hardening

Multi-OS support

Education

Bachelor's degree in technical discipline

Tools

JBoss Fusion Middleware

Job description

Role overview

A Senior System Administrator role supporting a Defense Information Systems Agency (DISA) engagement is open for remote work, with an active Secret clearance required. The position focuses on administering middleware-heavy enterprise applications across large-scale environments, with hands-on responsibility for deployment, tuning, security, and ongoing operations.

Responsibilities

• Administer and operate large-scale enterprise applications across multiple operating systems and supporting tooling.
• Install, configure, maintain, and troubleshoot middleware platforms such as JBoss Fusion Middleware in production environments.
• Lead application deployment, testing, tuning, and security hardening efforts.
• Contribute to at least two large-organization projects responsible for administering, operating, maintaining, and securing enterprise-scale applications.
• Collaborate across multidisciplinary teams on complex information processing initiatives.

Requirements

• Active Secret security clearance.
• At least 10 years of specialized experience in information processing, with concentrated hands-on work installing, configuring, maintaining, and resolving software issues.
• Five years of progressive experience administering middleware solutions, such as JBoss Fusion Middleware.
• At least three years of hands-on experience with application deployment, testing, tuning, and security.
• Capability to work across various operating systems and additional programming languages.
• Bachelor's degree (BS/BA) in a technical discipline.

Benefits and work setup

• a comprehensive healthcare package covering medical, dental, vision, and disability
• a 401(k) plan with immediate vesting and employer match after 90 days
• educational assistance
• a student loan repayment program
• gym reimbursement
• paid time off

The role is remote and tied to a proposal for future opportunities.