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Mainframe Computer Jobs in Chicago, IL (NOW HIRING)

Ensono

Media Tech

Downers Grove, IL

Perform UDP, Mainframe, and AS400 scans * Complete vault paperwork accurately as dedicated by ... Previous Experience working in a medium to large-scale computer data center environment is desired.

Capgemini

Mainframe Production Support

Chicago, IL · On-site

Ensures all daily scheduled computer production work is completed accurately. • Conducts scheduling and system monitoring tasks using appropriate tools. • Troubleshoots operational issues as 1st ...

360 IT Professionals

Java/J2EE Architect

Chicago, IL · On-site

$65 - $87.50/hr

... between mainframe application systems and various IBM and Microsoft Server Operation Systems ... in computer science or directly related fields, supplemented by five years of professional ...

blueStone

Database Administrator

Barrington, IL

... mainframe Operating Systems Good time/project management skills Good attention to detail Good problem solving skills Education and Experience Bachelors degree in Computer Science Additional ...

Allcon, Inc.

Infrastructure Architect

Chicago, IL

$68 - $87/hr

Bachelors degree or higher in IT, computer science, or other technical related field 10+ years of ... understanding of Mainframe, AS400, & Tandem Hands-on technical practitioner and individual ...

Collabera

SAS Programmer

Lake Bluff, IL · On-site

... PC and Mainframe applications. Interprets process, data modules, and business requirements into software code. Analyzes, designs, develops, implements and maintains moderate to complex computer ...

Allcon, Inc.

Infrastructure Architect

Chicago, IL · On-site

$68 - $87/hr

Bachelors degree or higher in IT, computer science, or other technical related field • 10+ years ... Mainframe, AS400, & Tandem • Hands-on technical practitioner and individual contributor • ...

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Mainframe Computer information

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$10

$54

$74

How much do mainframe computer jobs pay per hour?

As of Jul 10, 2026, the average hourly pay for mainframe computer in Chicago, IL is $54.99, according to ZipRecruiter salary data. Most workers in this role earn between $48.56 and $62.40 per hour, depending on experience, location, and employer.

Who still uses mainframe computers?

Mainframe computers are still used by large organizations such as banks, government agencies, and insurance companies for critical applications that require high reliability, security, and processing large volumes of data. Mainframe roles often involve skills in COBOL, JCL, and system administration, with professionals maintaining and optimizing these systems to ensure continuous operation.

What are the key skills and qualifications needed to thrive in the Mainframe Computer position, and why are they important?

To thrive as a Mainframe Computer Operator or Specialist, you need a solid understanding of mainframe hardware, operating systems (such as IBM z/OS), and data center best practices, alongside a degree in computer science or related experience. Familiarity with job scheduling tools (like JCL), monitoring utilities, and expertise in mainframe programming languages (such as COBOL) are commonly required, and certifications such as IBM Certified System Programmer are advantageous. Attention to detail, strong troubleshooting abilities, and excellent communication skills are essential for coordinating with IT teams and resolving system issues. These competencies ensure the reliability, security, and efficiency of mission-critical mainframe systems in large organizations.

What is a Mainframe Computer job?

A Mainframe Computer job typically involves working with large-scale, high-performance computing systems used by enterprises for critical applications such as banking, finance, and healthcare. Responsibilities may include system administration, application development, performance monitoring, and troubleshooting. Professionals in this field often work with mainframe operating systems like z/OS and programming languages such as COBOL, JCL, and REXX. This role requires strong analytical skills and knowledge of legacy systems, as mainframes continue to be integral to many industries.

Is mainframe a good career option?

Mainframe computing is a stable career choice with high demand for professionals skilled in COBOL, JCL, and mainframe environments. It offers competitive salaries, job security, and opportunities for specialization in legacy systems and enterprise data processing.

What are some common challenges faced by mainframe professionals in day-to-day operations?

Mainframe professionals often face challenges such as managing complex batch job schedules, troubleshooting unexpected system outages, and ensuring data security while dealing with legacy applications. The work requires careful monitoring for performance bottlenecks and rapid response to issues, often during off-hours or on-call rotations. Collaboration with programming, network, and system administration teams is frequent, as mainframe environments are integral to business-critical services. Successfully handling these challenges helps maintain uptime and reliability for the organization’s core operations.

What are mainframe jobs called?

Mainframe jobs are typically called mainframe systems analysts, mainframe programmers, or mainframe operators. These roles involve maintaining, developing, and managing large-scale computer systems using tools like COBOL, JCL, and IBM Z hardware. Certifications such as IBM Certified Systems Programmer can enhance job prospects in this field.

What is the average salary for mainframe jobs?

The average salary for mainframe computer professionals typically ranges from $70,000 to $120,000 annually, depending on experience, location, and certifications. Senior roles or those with specialized skills in COBOL, JCL, or mainframe security can earn higher salaries. Factors such as industry demand and company size also influence compensation levels.
What are popular job titles related to Mainframe Computer jobs in Chicago, IL? For Mainframe Computer jobs in Chicago, IL, the most frequently searched job titles are:
What job categories do people searching Mainframe Computer jobs in Chicago, IL look for? The top searched job categories for Mainframe Computer jobs in Chicago, IL are:
Mainframe Computer jobs near you
Infographic showing various Mainframe Computer job openings in Chicago, IL as of July 2026, with employment types broken down into 1% As Needed, 84% Full Time, 13% Part Time, and 2% Contract. Highlights an 82% Physical, 1% Hybrid, and 17% Remote job distribution, with an average salary of $114,373 per year, or $55 per hour.
Media Tech

Media Tech

Ensono

Downers Grove, IL

Full-time

Re-posted 27 days ago

Job description

Worker Type:

EmployeeThe Media Tech perform media rotations, offsite vaulting, ticket monitoring and management, and other related functions associated with managing tape library and tape operations for both mainframe and server environment. This also includes media management within ATLs and media servers, loading and unloading drives and maintaining basic functionality for use. They also send and receive media, perform troubleshooting and report hardware issues.

Responsibilities:

  • Submit the daily requests in a timely fashion unless auto generated.
  • Provide reports on SLA accuracy
  • Provide monthly reports from vendors pertaining to tape rotations and offsite storage
  • Monitor all Libraries ejects promptly
  • Perform Vault ejects to complete daily vaulting task
  • Perform UDP, Mainframe, and AS400 scans
  • Complete vault paperwork accurately as dedicated by Ensono procedures
  • Follow all procedures for handoff to offsite providers
  • Verify incoming vault tapes
  • Perform floor mounts as needed
  • Monitor Service Now ticket queue and respond as required.
  • Update all tickets accurately
  • Monitor Email and respond appropriately
  • Check UDP and AS400 scratch levels and add tapes as needed.
  • Update SLA report accurately 100% of the time
  • Daily task deadlines take priority
  • Handle tape freezes and prep tapes for DR exercises as needed
  • Perform Daily Shift Turnover
  • Work on tape operation projects as assigned
  • Perform all scheduled Client and Vendor escort activities

Required:

  • Previous Experience working in a medium to large-scale computer data center environment is desired.
  • Experience working with Tape Media, Libraries, tape drives, storage units and management software.
  • Excellent listening and communication skills.
  • Self-motivated, with high energy and an engaging level of enthusiasm.

Primary Location City/State:

Downers Grove, IL - Finley, Illinois

Additional Locations (if applicable):

Ensono is an Equal Employment Opportunity Employer. Ensono provides equal employment opportunities to all qualified applicants without regard to race, color, religion, national origin, ancestry, citizenship status, sex, marital status, pregnancy, age, disability, genetic information, sexual orientation, gender identity or expression, veteran status, military status, or any other status protected by applicable law.

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About Ensono

Sourced by ZipRecruiter

At Ensono, our **Purpose is to be a relentless ally, disrupting the status quo and unleashing our clients to** **_Do Great Things!_** We enable our clients to achieve key business outcomes that reshape how our world runs. As an expert technology adviser and managed service provider with cross-platform certifications, Ensono empowers our clients to keep up with continuous change and embrace innovation.

Industry

It services

Company size

1,001 - 5,000 Employees

Headquarters location

Downers Grove, IL, US

Year founded

1969

Social media

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