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Mainframe Computer Jobs in Washington (NOW HIRING)

... mainframe systems. Supports both OS and hardware upgrades, cloud initiatives, disaster recovery ... Prolonged periods of computer desk work. * Dexterity of hands and fingers to operate a computer ...

Mainframe System Programmer

Mclean, VA · On-site +1

$120K - $140K/yr

... mainframe systems. Supports both OS and hardware upgrades, cloud initiatives, disaster recovery ... Prolonged periods of computer desk work. * Dexterity of hands and fingers to operate a computer ...

Knowledge of mainframe computer software (PeopleSoft) relating to record keeping/scheduling for drivers and helpers. * Preferred experience in Windows environment and on Excel, Microsoft Word, and ...

.NET Mainframe Developer

Vienna, VA · Remote

$50.25 - $64.50/hr

Bachelor's degree in Computer Science, Information Systems, or related field, or the equivalent combination of education, training, or experience. * 5-7 years of experience in application or software ...

.NET Mainframe Developer

Vienna, VA · Remote

$50.25 - $64.50/hr

Bachelor's degree in Computer Science, Information Systems, or related field, or the equivalent combination of education, training, or experience. * 5-7 years of experience in application or software ...

.NET Mainframe Developer

Vienna, VA · Remote

$50.25 - $64.50/hr

Bachelor's degree in Computer Science, Information Systems, or related field, or the equivalent combination of education, training, or experience. * 5-7 years of experience in application or software ...

.NET Mainframe Developer

Vienna, VA · Remote

$50.25 - $64.50/hr

Bachelor's degree in Computer Science, Information Systems, or related field, or the equivalent combination of education, training, or experience. * 5-7 years of experience in application or software ...

.NET Mainframe Developer

Vienna, VA · Remote

$50.25 - $64.50/hr

Bachelor's degree in Computer Science, Information Systems, or related field, or the equivalent combination of education, training, or experience. * 5-7 years of experience in application or software ...

.NET Mainframe Developer

Vienna, VA · Remote

$50.25 - $64.50/hr

Bachelor's degree in Computer Science, Information Systems, or related field, or the equivalent combination of education, training, or experience. * 5-7 years of experience in application or software ...

HELP DESK

Washington, DC

$23.25 - $31.75/hr

Experience with Mainframe operations a plus including working knowledge and skill operating z/OS ... Desired Skills: BS/BA in Information Systems, Computer Science or related field HIGHLY DESIRABLE ...

Showing results 21-40

Mainframe Computer information

What is a mainframe computer?

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.

What are the key skills and qualifications needed to thrive in the mainframe computer position?

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 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.

Is a mainframe computer a good career option?

A career as a mainframe computer professional involves maintaining and supporting large-scale enterprise systems, which are critical for industries like finance and government. It requires skills in mainframe operating systems, programming languages such as COBOL, and certifications like IBM Certified Systems Expert. The role offers stability and demand due to the continued reliance on mainframes for mission-critical applications.

Is a mainframe computer still in demand?

Mainframe computers remain in demand for large-scale enterprise applications, especially in banking, finance, and government sectors that require high reliability, security, and processing power. Skilled mainframe professionals with knowledge of COBOL, JCL, and mainframe environments are sought after to maintain and upgrade these systems.

What are jobs in mainframe computer?

Jobs in mainframe computers include roles such as mainframe programmers, system analysts, and operators who maintain, develop, and troubleshoot mainframe systems. These positions often require knowledge of languages like COBOL or PL/I, familiarity with mainframe operating systems such as z/OS, and certifications in mainframe technology. Mainframe professionals work in environments that demand high reliability and security, often following shift schedules to ensure continuous system operation.

What are popular job titles related to Mainframe Computer jobs in Washington?

For Mainframe Computer jobs in Washington, the most frequently searched job titles are:

What job categories do people searching Mainframe Computer jobs in Washington look for?

The top searched job categories for Mainframe Computer jobs in Washington are:

Infographic showing various Mainframe Computer job openings in Washington as of August 2026, with employment types broken down into 1% As Needed, 80% Full Time, 10% Part Time, 2% Temporary, 6% Contract, and 1% Nights. Highlights an 71% Physical, 2% Hybrid, and 27% Remote job distribution.

$120K - $140K/yr

Full-time

Medical, Retirement, PTO

Re-posted yesterday


Job description

The IBM Network Systems Programmer reviews all products and processes to verify the requirement of compatibility maintenance, schedule and implement changes as required and performs routine maintenance on mainframe systems. Supports both OS and hardware upgrades, cloud initiatives, disaster recovery events and the onboarding of new customers. 


  • Provide 24x7/365 remote support services and on-premises response as needed.
  • Utilize IBM’s SMP/E software products installation and maintenance utility process.
  • Utilize IBM’s Job Control Language (JCL) and utility programs (i.e. IEBGENER) to maintain z/OS software products.
  • Utilize IBM’s file structure(s): (i.e. HFS, ZFS, and PDS’s), TSO ISPF panels, IBM’s SDSF and/or equivalent ISV product, and IBM data storage product DFSMS.
  • Technical consulting and analysis of new technologies, implementation strategy, and impact to production.
  • Independently diagnose and resolve trouble calls in technical areas. 
  • Develop and implement technical documentation and technical specifications, in accordance with established requirements and schedules.
  • Review proposed policy, regulations, and procedural changes to determine impact on area of responsibility.
  • Develop on-the-job training (OJT) programs on new developments in technology and software packages.
  • Participate in Agile project management and a DevSecOps culture as required.

  • As a requirement of this position, all candidates must be a U.S. Citizen. In accordance with 8 U.S.C. 1324b(a)(2)(C), Epsilon will not consider candidates for this position who do not meet the aforementioned conditions.
  • Proven System programmer experience managing, maintaining, and configuring Virtual Telecommunications Access Method (VTAM) and application programming interface (API) as part of the Systems Network Architecture (SNA) for an IBM mainframe environment.
  • Demonstrated System programmer experience managing and maintaining and configuring of TCP/IP.
  • Experience and comfort with change and ambiguity given the ever-changing nature of the business.
  • Experience working with z/OS Systems (z/OS 2.4), Pageant encryption setup and configuration.
  • Experience with SSH, TLS, SFTP, FTP network communication protocols.
  • Bachelor’s degree in information systems (preferred) or related field.
  • As a subject matter expert, participate in meetings with Information Assurance to share information to assist in documentation of security controls.
  • Strong analytical skills and attention to detail.
  • Excellent written and verbal communication skills to communicate with key stakeholders, process owners, and customers to manage expectations, eliminate gaps, and ensure success.
  • Ability to work independently and as part of a team.
  • Must have experience using the following software suites, IBM’s Multi-Factor Authentication, CL/SuperSession or other multi-session product, IODF, BMC Control-M

Other:

  • Must be able to pass federal background investigation and obtain a Public Trust

Physical Demands and Working Conditions:

Listed below are the physical or mental requirements necessary for the job's performance. Reasonable accommodation may be made to enable individuals with disabilities to perform essential job functions:

  • Prolonged periods of computer desk work.
  • Dexterity of hands and fingers to operate a computer keyboard and other computer components.
  • Speaking and hearing are sufficient to converse and understand conversations, both in-person, telephone, and virtual meetings.
  • The cognitive skills needed to complete tasks, including abilities such as learning, remembering, focusing, categorizing, and integrating information for decision-making, problem-solving, and comprehending.
  • Ability to learn new tasks, remember processes, maintain focus, complete tasks independently, make timely decisions in the context of a workflow, and the ability to communicate with managers and co-workers.
  • Mental aptitude to respond appropriately in high-pressure situations or deadline-driven environments.
  • Maintain a professional emotional response when working with others.

AMERICAN SYSTEMS is committed to pay transparency for our applicants and employee-owners. The salary range for this position is USD $120,000.00/Yr. - USD $140,000/Yr. Actual compensation will be determined based on several factors permitted by law. AMERICAN SYSTEMS provides for the welfare of its employees and their dependents through a comprehensive benefits program by offering healthcare benefits, paid leave, retirement plans, insurance programs, and education and training assistance.
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