Senior System Administrator

Innovative Systems & Solutions | Full time - Onsite

Senior System Administrator - FFPP-8804

Annapolis Junction, United States | Posted on 03/17/2026

Innovative Systems & Solutions (ISS) works with a wide spectrum of talent to establish an atmosphere that stimulates creativity, constant progress, and achievement. At ISS, you will have the chance to immediately impact government transformation and our clients' missions by offering information solutions and services to Federal and Department of Defense (DoD) customers. Employees at ISS can look forward to exciting career opportunities.

Job Description

Senior System Administrator (TS/SCI with Polygraph)

Location: Annapolis Junction, Maryland

Innovative System Solutions (ISSI) is seeking a Senior System Administrator with an active TS/SCI clearance with polygraph . This is an exciting opportunity for candidates seeking meaningful work in a collaborative, team-oriented environment.

About the Role

The Senior System Administrator will support the implementation, troubleshooting, and maintenance of Information Technology (IT) systems. This role is responsible for managing system infrastructure and ensuring reliable day-to-day operations across client, server, storage, and network environments.

Key Responsibilities

• Provide Tier 1 (Help Desk) and Tier 2 (Escalation) support, including problem identification, diagnosis, and resolution
• Support escalation processes and communicate status updates to agency management and internal stakeholders
• Maintain involvement in dispatch system and hardware issue resolution
• Configure and manage UNIX and Windows operating systems
• Install, troubleshoot, and maintain operating system software and network components
• Implement system enhancements to improve performance and reliability
• Monitor daily IT system operations, including servers, storage, networks, and mobile devices
• Perform system capacity planning and resource optimization
• Develop system engineering management and integration/test plans
• Provide detailed analysis and feedback for escalated issues
• Collaborate with government personnel, program staff, and senior leadership
• Ensure technical integrity of systems engineering deliverables

Requirements

Qualifications

• Active TS/SCI clearance with polygraph (required)
• Minimum 10 years of experience as a System Administrator in programs of similar scope and complexity
• Bachelor’s degree in a technical discipline from an accredited college or university
• Substitutions:
• 5 additional years of SA experience may substitute for a degree
• 5 additional years of Systems Engineering experience may also substitute
• Strong experience troubleshooting complex IT systems
• Experience with UNIX and Windows system administration
• Ability to manage daily IT operations and provide user support

Salary Range 170-175,000

The salary range provided is a general guideline. ISSI considers several factors when determining compensation, including the role’s responsibilities, candidate experience, education, skills, and current market conditions.

What We Offer

ISSI provides a highly competitive benefits package, including:

• 401(k) with matching contributions
• Health, Dental, and Vision coverage
• Employer-funded Health Savings Account (HSA)
• Life and AD&D insurance
• Short-Term and Long-Term Disability coverage
• Business travel and expense reimbursement
• Employee referral program with cash bonuses
• Employee recognition program
• Tuition and training reimbursement

Who Is ISSI?

ISSI is a growing management and technology consulting firm specializing in systems and software solutions. Our team is dedicated to delivering exceptional results for both our clients and employees.

Since our inception, we have focused on developing innovative solutions that help organizations achieve their goals. We pride ourselves on collaboration, technical excellence, and staying at the forefront of emerging technologies.

Equal Opportunity Employer

ISSI is proud to be an Equal Opportunity Employer. All employment decisions—including hiring, promotion, discipline, and termination—are based on merit and business needs. We do not discriminate on the basis of race, color, religion, age, genetic information, or any other protected status under federal, state, or local law.

Innovative Systems & Solutions is an Equal Opportunity Employer and does not discriminate on the basis of race or ethnicity, religion, sex, national origin, age, veteran disability, or genetic information or any other reason prohibited by law in employment.