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Mainframe Computer Jobs in Washington (NOW HIRING)

A.C. Coy

z/OS Mainframe Developer (Remote)

Alexandria, VA · On-site +1

$52.50 - $67.50/hr

A degree from an accredited College/University in Software Engineering, Computer Science, or ... Experience in mainframe migration projects or modernization initiatives is preferred. * Experience ...

Tata Consultancy Services

Engineer

Mclean, VA · On-site

The role involves designing, developing, and maintaining COBOL/JCL-based mainframe applications ... COMPUTER SCIENCE • Strong written and verbal communication skills, especially in client-facing ...

System One

.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 ...

System One Holdings, LLC

.NET Mainframe Developer

Vienna, VA · On-site

$49.25 - $63.25/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 ...

System One

.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 ...

System One

.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 ...

System One

.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 ...

4 Consulting Inc.

Software Developers

Fairfax, VA · On-site

... Computer Science, Information Technology, Engineering, Business, or related field, or equivalent combination of education and experience. Experience 5+ years of experience in mainframe application ...

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Mainframe Computer information

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 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:
Mainframe Computer jobs near you
Infographic showing various Mainframe Computer job openings in Washington as of July 2026, with employment types broken down into 94% Full Time, and 6% Contract. Highlights an 91% In-person, 3% Hybrid, and 6% Remote job distribution.
z/OS Mainframe Developer (Remote)

z/OS Mainframe Developer (Remote)

A.C. Coy

Alexandria, VA • On-site, Remote

$52.50 - $67.50/hr

Other

Posted 20 days ago

Job description

Overview
  • Tier One Technologies has an immediate need for a z/OS Mainframe Developer to support our US Government client.
  • This is going to be a 100% remote position.
  • SELECTED CANDIDATES WITHOUT REQUIRED CLEARANCE WILL BE SUBJECT TO A FEDERAL GOVERNMENT BACKGROUND INVESTIGATION TO RECEIVE IT.

Responsibilities
  • Research, design, implement, and manage software programs as well as testing and evaluating new programs.
  • Resolve problems with software and respond to suggestions for improvements and enhancements.
  • Write and implement efficient code. Develop quality assurance procedures and deploy software tools, processes and metrics.
  • Participate in development of software user manuals. Instructs, assigns, directs, and checks the work of other software developers on the development team.
  • Consult with engineering staff to evaluate software-hardware interfaces and develop specifications and performance requirements.

Qualifications
  • A degree from an accredited College/University in Software Engineering, Computer Science, or related discipline is required.
  • 8+ years of hands-on experience with COBOL programming on IBM z/OS.
  • Proficiency in JCL, VSAM, DB2, IMS, CICS and RACF.
  • Strong knowledge of batch processing and online transaction processing.
  • Must have experience with IBM utilities, TSO/ISPF, and Abend-AID.
  • Experience in mainframe migration projects or modernization initiatives is preferred.
  • Experience with Control-D, Control-M, File-AID.
  • Familiarity with AI/ML tools (CoPilot, WatsonX, ReDux, others) for code analysis, pattern recognition, or modernization support.
  • Understanding of AI-driven code refactoring platforms/products and the ability to leverage AI to improve testing, documentation, and process optimization.
  • Familiarity with DevOps practices on mainframes, including tools like Jenkins and Git.
  • Strong written and verbal communication skills (ability to translate between business and technical concepts).
  • All candidates must be US Citizens or have permanent residence status (Green Card).
  • Must be able to obtain Public Trust Clearance.
  • Candidate must have lived in the United States for the past 5 years.
  • Cannot have more than 6 months travel outside the United States within the last 5 years. Military Service excluded.
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About A.C. Coy Company- Staffing & Consulting Services

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Since 1986, our mission is to be the “Always on Target” staffing and consulting provider by helping people and companies achieve their hiring goals. The team is dedicated to achieving these goals by attracting and retaining top talent that meets our clients’ culture and environment. We are fully engaged with our people and companies through ongoing communication to ensure expectations are met.

Industry

Recruiting and staffing services

Company size

51 - 200 Employees

Headquarters location

Canonsburg, PA, US

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