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Mainframe Computer Jobs in Washington (NOW HIRING)

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 ...

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 ...

Infojini Inc

HELP DESK

Washington, DC · On-site

$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 ...

System One

Technology Management I

Washington, DC · Remote

$94.87/hr

Own the target-state design of the client's DevSecOps platform spanning Azure/AKS, AWS, mainframe z ... Bachelor's degree in Computer Science, Computer Engineering, Information Systems, Electrical ...

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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:

Mainframe Computer jobs near you
Infographic showing various Mainframe Computer job openings in Washington as of September 2026, with employment types broken down into 86% Full Time, and 14% Contract. Highlights an 92% In-person, 2% Hybrid, and 6% Remote job distribution.

Senior Application Engineer

Vienna, VA

Neshent Technologies
11 - 50 employees
Learn more about Neshent Technologiesexternal

Full-time

Posted 5 days ago

Job description

Job Summary

We are seeking an experienced Application Engineer with strong expertise in cloud integration, enterprise application development, and IBM mainframe technologies. The role will focus on designing scalable solutions, modernizing legacy platforms, implementing cloud and event-driven integrations, and providing Level 3 production support.

Roles and Responsibilities
  • Provide technical leadership to Agile teams and contribute to SAFe ceremonies, planning, estimation, and delivery activities.
  • Design and implement scalable cloud-based integration solutions using MuleSoft, Kafka, Azure Integration Services, and related technologies.
  • Develop and integrate applications using Java, Spring, REST APIs, OAuth 2.0, microservices, and event-driven architectures.
  • Support cloud migration, platform modernization, and integration initiatives across mainframe, cloud, distributed, and SaaS environments.
  • Design and implement highly available IBM z/OS mainframe application and platform solutions.
  • Develop, maintain, debug, and enhance COBOL, JCL, SORT, Assembler, REXX, and DB2 applications using Changeman.
  • Work with CICS, IMS, JES2/JES3, MQ, TSO/ISPF, SDSF, TCP/IP, and z/OS UNIX System Services (USS/OMVS).
  • Implement and maintain mainframe automation using IBM System Automation, IBM NetView, automation tables, policies, command lists, and event processing.
  • Support workload scheduling, batch processing, recovery/restart, monitoring, and self-healing automation.
  • Integrate mainframe platforms with cloud, monitoring, event management, ITSM, and API-based solutions.
  • Create and maintain technical documentation, architecture diagrams, operational procedures, automation definitions, dependencies, and recovery processes.
  • Provide Level 3 production support, troubleshooting application, batch, middleware, automation, performance, and availability issues.
  • Participate in on-call support for highly available production environments.
  • Identify opportunities to automate and optimize repetitive administration and application support processes.
  • Ensure solutions meet security, engineering, compliance, and information security standards.
  • Research, evaluate, deploy, and configure technologies supporting business and application needs.
Required Qualifications
  • 8–10 years of experience as an Application, Cloud, Integration, or Enterprise Engineer in complex environments.
  • Strong hands-on experience with Java, Spring, MuleSoft, REST APIs, OAuth 2.0, and message brokers.
  • Extensive experience with IBM z/OS and mainframe technologies, including JCL, REXX, TSO/ISPF, SDSF, CICS, DB2, IMS, JES2/JES3, MQ, TCP/IP, and USS/OMVS.
  • Experience with IBM System Automation for z/OS and IBM NetView, including automation policies, tables, message automation, event processing, resource dependencies, and command lists.
  • Experience with Azure, AWS, or Google Cloud Platform, preferably with managed integration services such as Azure Functions, Logic Apps, API Management, and Event Grid.
  • Experience integrating mainframe applications with cloud and distributed systems.
  • Experience supporting highly available production environments, including monitoring, recovery, restart, batch processing, workload scheduling, and automation.
  • Knowledge of Parallel Sysplex and workload scheduling tools such as IBM Workload Scheduler (IWS/TWS/ZWS).
  • Strong analytical, problem-solving, organizational, communication, and decision-making skills.
  • Bachelor's degree in Computer Science, Information Technology, or a related field, or equivalent experience.
Preferred Qualifications
  • Master's degree in Computer Science, Information Technology, or a related field.
  • Experience with cloud-native applications and LOS/LMS platforms.
  • Exposure to Databricks or data lake platforms.
  • Experience with relational databases, data modeling, and ETL technologies.
  • Experience in lending origination, servicing, or related financial services domains.
  • Experience with AI/ML technologies.

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