Mainframe Systems Administrator

Job ID: 112080

Location: Reston , Virginia [Remote]

Category: App/Dev

Employment Type: Contract

Date Added: 02/23/2026

The Mainframe Systems Administrator is responsible for ensuring the optimal operation, security, and integrity of our enterprise mainframe environment. This role involves operating, monitoring, and maintaining mainframe systems, peripherals, servers, and network components to support business-critical applications. The administrator will participate in disaster recovery planning and testing, provide first-level help desk support, and adapt to diverse operational duties within customized data centers. Collaboration with network engineers and system security teams is essential to maintain seamless, secure, and efficient system performance.

Key Responsibilities:

• Operate, monitor, and maintain mainframe systems, peripherals, and related infrastructure to ensure high availability and reliability.
• Assist in disaster recovery planning, testing, and execution to safeguard data and ensure business continuity.
• Provide first-level help desk support, troubleshooting user issues related to mainframe applications and systems.
• Manage system security functions, including user access, permissions, and security policies.
• Maintain comprehensive system documentation, including configuration, procedures, and operational logs.
• Monitor system performance, identify bottlenecks, and implement solutions to optimize efficiency.
• Install, upgrade, and patch system-wide software and applications.
• Collaborate with network engineers and security teams to support integrated system operations.
• Develop and enforce policies and standards for resource allocation and system usage.
• Ensure compliance with organizational and industry standards for data security and operational excellence.

Qualifications

• Proven experience working in a mainframe environment is required.
• Proficiency with mainframe operating systems, hardware, and peripherals.
• Exposure to IDMS or similar database management systems is a plus.
• Familiarity with AGILE methodologies and practices is advantageous.
• Strong troubleshooting, problem-solving, and communication skills.
• Ability to adapt to fast-paced, evolving operational environments.

Publishing Pay Range: $27.00 – $32.00 hourly

About GDH:

At GDH, we believe in the power of people and the importance of caring. Our culture statement, “We care about people,” isn’t just a tagline – it’s the core of everything we do. GDH is a premier staffing and talent solutions company dedicated to helping businesses find the best talent and assisting job seekers in finding their dream jobs.

Who We Are:

GDH, founded in 2001, has grown into a leader in providing staffing solutions across various industries. We specialize in IT across several sectors, connecting top talent with leading enterprises. As a Best of Staffing firm recognized for excellence in client, employee, talent, and women’s services, we pride ourselves on our commitment to quality and service.

GDH Benefits

GDH offers a range of employee benefits that are designed to promote well-being and help maintain a healthy work-life balance. These comprehensive benefits cover various aspects of an employee’s life and aim to enhance their overall experience with the company. Our health benefits include three medical insurance options with access to KISx Card, Zero Card, and HealthJoy concierge services. Other plan offerings include dental, vision, life, disability, supplemental insurance, and pet insurance plans. Enjoy additional perks like holiday pay, 401(k) plan, direct deposit, an employee referral program, work-life balance benefits, a Wellbeats membership, a discounted gym membership program, and more! For more detailed information on benefits, please go to GDH’s website under the tab for candidates.

GDH provides equal employment opportunities (EEO) to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, gender, sex (including pregnancy), sexual orientation, gender identity, national origin, age, disability, genetic information, marital status, ancestry, protected veteran status, military or uniformed service member status, or any other status or characteristic protected by applicable federal, state, and local laws. Applicants with disabilities who require an accommodation or assistance in applying and/or for interviewing, please contact our HR Department.