Temporary Mainframe Jobs in Missouri (NOW HIRING)

Location: Hybrid (Kansas City, MO Area)

Employment Type: Contract with Potential for Extension/Conversion

Schedule: Standard business hours with occasional after-hours support as needed

We are seeking an experienced Linux Systems Administrator to support a large-scale infrastructure modernization initiative involving the migration of legacy business applications from a traditional mainframe environment to a modern Linux-based cloud platform.

This role is focused on systems administration and platform support, ensuring the stability, performance, and ongoing maintenance of critical enterprise applications running on Linux infrastructure. The ideal candidate will possess deep expertise in Linux administration, cloud environments, and Rocket Software (formerly Micro Focus) technologies supporting COBOL-based workloads.

The successful candidate will join an established migration program and play a key role in supporting project completion, operational readiness, knowledge transfer activities, and long-term infrastructure support.

• Administer and maintain enterprise Linux environments, including Red Hat Enterprise Linux (RHEL) and SUSE Linux.
• Perform system patching, upgrades, software installations, deployments, and performance tuning.
• Support Rocket Enterprise Server environments hosting COBOL applications on Linux platforms.
• Provide infrastructure support for legacy application modernization and cloud migration initiatives.
• Monitor system health, troubleshoot production issues, and implement corrective actions.
• Document system configurations, operational procedures, and support processes.
• Collaborate with infrastructure, development, cloud, and application teams to ensure platform stability.
• Participate in knowledge transfer sessions and contribute to operational readiness efforts.
• Support enterprise workloads running within AWS cloud environments.
• Assist with post-migration stabilization and transition to steady-state operations.
• Provide occasional after-hours support for critical incidents and scheduled maintenance activities.

• 5+ years of Linux systems administration experience.
• Strong experience administering Red Hat and/or SUSE Linux environments.
• Hands-on experience with Rocket Enterprise Server (formerly Micro Focus Enterprise Server).
• Familiarity supporting Rocket Enterprise Developer environments.
• Experience deploying and maintaining Linux workloads in AWS.
• Strong command-line administration and troubleshooting skills.
• Experience performing system upgrades, patch management, and application deployments.
• Excellent problem-solving, organizational, and documentation skills.
• Strong verbal and written communication abilities.
• Ability to work independently with minimal supervision.

• Experience supporting COBOL-based application environments.
• Knowledge of mainframe modernization or migration initiatives.
• Familiarity with DB2, Teradata, or related database integrations.
• Understanding of JCL, control cards, and legacy processing frameworks.
• Experience supporting data warehousing, reporting, or enterprise product development environments.
• Experience in cloud transformation or lift-and-shift migration projects.

• Linux (Red Hat, SUSE)
• AWS Cloud Services
• Rocket Enterprise Server
• Rocket Enterprise Developer
• COBOL Application Platforms
• DB2
• Teradata
• Enterprise Infrastructure & Migration Tools

• Opportunity to contribute to a large-scale enterprise modernization initiative.
• Exposure to cloud transformation and legacy application migration projects.
• Hands-on experience with specialized Rocket Software technologies.
• Opportunity to influence long-term infrastructure operations and support models.
• Collaborative team environment focused on innovation and modernization.

This role is well-suited for a Linux Subject Matter Expert (SME) who has experience supporting Rocket/Micro Focus environments and enjoys working at the intersection of legacy systems and modern cloud infrastructure. The ideal candidate is self-driven, technically strong, and comfortable owning critical Linux platforms within a complex enterprise environment.

This is a Contract position based out of Kansas City, MO.

The pay range for this position is $50.00 - $60.00/hr.

Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following:
• Medical, dental & vision
• Critical Illness, Accident, and Hospital
• 401(k) Retirement Plan – Pre-tax and Roth post-tax contributions available
• Life Insurance (Voluntary Life & AD&D for the employee and dependents)
• Short and long-term disability
• Health Spending Account (HSA)
• Transportation benefits
• Employee Assistance Program
• Time Off/Leave (PTO, Vacation or Sick Leave)

This is a hybrid position in Kansas City,MO.

This position is anticipated to close on Jul 27, 2026.

We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company.

The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

We’re a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We’re a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. We’re strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We’re building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.