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Mainframe Jobs in Connecticut (NOW HIRING)

nLeague

Mainframe Systems Programer

Hartford, CT · On-site

$55.50 - $70.50/hr

Mainframe Mainframe Programmer/ Developer Location: Hybrid- 55 Farmington Avenue Hartford, Connecticut Client: CT DSS Duration: 06+ months * Analyse existing mainframe applications, databases, files ...

InstantServe LLC

Mainframe Systems Programmer

Hartford, CT · On-site

$55.50 - $70.50/hr

Mainframe Systems Programmer - Hybrid (Connecticut) Location: Hybrid - Connecticut (Local Candidates Only) Duration: Long-Term Contract Job Overview The Connecticut Department of Social Services (DSS ...

Sonsoft Inc

Mainframe Performance Expert

Berlin, CT

$48.50 - $62.50/hr

At least 3 years of experience in Mainframe, RACF & ACF2 Migration Skills * At least 2 years of experience in Development/ Configuration/solutions evaluation/ Validation and deployment * Experience ...

ICONMA

Mainframe IT Project Manager

Hartford, CT

$99K - $117K/yr

Mainframe IT Project Manager Location: Hartford, CT Duration: 6 months with possible contract to hire Description: - Host Mainframe background leveraging Cobol and Endeavor - Partner with on/offshore ...

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How much do mainframe jobs pay per hour?

As of Jul 27, 2026, the average hourly pay for mainframe in Connecticut is $50.78, according to ZipRecruiter salary data. Most workers in this role earn between $44.81 and $57.64 per hour, depending on experience, location, and employer.

What is the average salary for mainframe jobs?

The average salary for mainframe professionals typically ranges from $70,000 to $120,000 annually, depending on experience, location, and certifications. Senior roles or specialized skills in mainframe environments, such as COBOL or JCL, can command higher salaries. Many positions also offer benefits like retirement plans and training opportunities.

What jobs in the US pay 300,000 a year?

Mainframe professionals such as senior systems architects, lead developers, and IT managers with extensive experience and specialized skills can earn $300,000 or more annually. These roles often require expertise in mainframe technologies like COBOL, JCL, and mainframe security, along with certifications and leadership responsibilities.

What are the key skills and qualifications needed to thrive as a Mainframe Developer, and why are they important?

To excel as a Mainframe Developer, a strong background in COBOL, JCL, mainframe operating systems (like z/OS), and database management is essential, often supported by a degree in computer science or a related field. Familiarity with tools such as IBM DB2, CICS, VSAM, and mainframe version control systems is typically required, and certifications like IBM Certified System Programmer can be advantageous. Analytical thinking, problem-solving abilities, and effective communication are important soft skills for identifying issues and collaborating with cross-functional teams. These skills ensure reliable maintenance, development, and modernization of mission-critical legacy systems that support large-scale business operations.

Is mainframe a good career option?

Mainframe careers involve working with large-scale computer systems used by many organizations for critical applications. The role typically requires knowledge of programming languages like COBOL, system administration, and understanding of legacy systems, with steady demand in finance, government, and large enterprises. It can be a stable career with opportunities for specialization and certification but may require ongoing learning of evolving technologies.

What Is a Mainframe Application Developer Job Description?

The job description of a mainframe application developer is to sustain the central data processing system, or mainframe. Common duties include designing applications, analyzing data, running reports, and deploying mainframe applications. This job requires a great deal of collaboration to keep the mainframe going and a strong understanding of mainframe languages. A key part of this role is to align the design of the mainframe with changing business needs.

What are mainframes and what do they do?

Mainframes are powerful computers used mainly by large organizations for critical applications, bulk data processing, large-scale transaction processing, and enterprise resource planning. They are known for their reliability, scalability, and security, making them essential for industries like banking, healthcare, and government. Mainframes can handle thousands of users and transactions simultaneously, supporting the core operations of many businesses.

What are some typical challenges faced by mainframe professionals when integrating legacy systems with modern technologies?

Mainframe professionals often encounter challenges when integrating legacy systems with newer technologies, such as ensuring data compatibility, managing security protocols, and minimizing downtime during migration. These tasks require a deep understanding of both the existing mainframe architecture and the modern platforms being introduced. Collaboration with cross-functional teams—including application developers, security specialists, and project managers—is essential to ensure seamless integration and to address potential issues proactively. Staying updated on the latest integration tools and best practices also helps in overcoming these challenges efficiently.

Can AI replace mainframe?

Mainframe professionals work with large-scale, mission-critical systems that require specialized skills in legacy technologies, security, and data management. While AI can automate certain tasks like data analysis and system monitoring, it is unlikely to fully replace mainframe roles due to the complexity and reliability requirements of mainframe environments. Instead, AI tools are often integrated to enhance efficiency and support mainframe operations.

What is the difference between Mainframe vs Mainframe Developer?

AspectMainframeMainframe Developer
Primary RoleMaintains and manages mainframe hardware and systemsDesigns, develops, and tests mainframe applications
Skills & CertificationsKnowledge of mainframe hardware, OS, and basic scriptingProficiency in COBOL, JCL, and mainframe programming languages
Work EnvironmentData centers, enterprise IT departmentsDevelopment teams within mainframe environments
Industry UsageUsed by organizations with legacy systemsDevelops and maintains those legacy systems

While Mainframe professionals focus on maintaining the hardware and system infrastructure, Mainframe Developers specialize in creating and updating mainframe applications. Both roles require knowledge of mainframe environments, but their responsibilities differ significantly within the same industry.

More about Mainframe jobs
What are the most commonly searched types of Mainframe jobs in Connecticut? The most popular types of Mainframe jobs in Connecticut are:
What are popular job titles related to Mainframe jobs in Connecticut? For Mainframe jobs in Connecticut, the most frequently searched job titles are:
What job categories do people searching Mainframe jobs in Connecticut look for? The top searched job categories for Mainframe jobs in Connecticut are:
What cities in Connecticut are hiring for Mainframe jobs? Cities in Connecticut with the most Mainframe job openings:
Mainframe jobs near you
Infographic showing various Mainframe job openings in Connecticut as of July 2026, with employment types broken down into 90% Full Time, 2% Part Time, and 8% Contract. Highlights an 82% Physical, 5% Hybrid, and 13% Remote job distribution, with an average salary of $105,618 per year, or $50.8 per hour.

Mainframe Systems Programer

nLeague

Hartford, CT • On-site

$55.50 - $70.50/hr

Contractor

Posted 17 days ago

Job description

Job id: Mainframe

Mainframe Programmer/ Developer

Location: Hybrid- 55 Farmington Avenue   Hartford, Connecticut

Client: CT DSS

Duration: 06+ months

Job Description:

  • Analyse existing mainframe applications, databases, files, and batch processing workflows to support migration activities.
  • Design, develop, and execute data extraction processes from IMS databases and legacy mainframe data sources.
  • Create, modify, and support JCL required for data extracts, file transfers, conversion processing, and migration testing.
  • Perform COBOL program analysis and code modifications to support data extraction, transformation, validation, and reconciliation requirements.
  • Review and update FTP/SFTP processes to support secure transmission of migration files between source and target environments.
  • Utilize IMS utilities and BMC Utilities for IMS to unload, extract, validate, and reconcile database content.
  • Develop and execute data validation and reconciliation procedures to ensure data integrity throughout the migration lifecycle.
  • Support file mapping, field-level transformation logic, and data conversion specifications.
  • Troubleshoot batch failures, abends, data discrepancies, and performance issues related to migration processing.
  • Collaborate with database administrators, architects, business analysts, and project teams to define migration requirements and resolve technical challenges.
  • Create technical documentation, migration runbooks, implementation procedures, and production support documentation.
  • Participate in migration testing, system integration testing, user acceptance testing, and production implementation activities.
  • Provide production support during migration cutover and post-implementation stabilization periods.
  • Identify opportunities for automation using CLIST, REXX, File-AID, and other mainframe utilities.
  • Ensure compliance with enterprise change management, security, and audit requirements.
  • Required Qualifications
  • 10+ years of Mainframe Development experience.
  • Expert-level COBOL programming experience.
  • Strong JCL development and troubleshooting skills.
  • Extensive IMS Database experience.
  • Experience with BMC Utilities for IMS.
  • Experience developing large-scale data extracts and conversion processes.
  • Strong understanding of FTP/SFTP file transfer methodologies.
  • Proven experience supporting enterprise data migration or modernization initiatives.
  • Experience performing data analysis, reconciliation, and validation.
  • Ability to work independently with minimal supervision in a deadline-driven environment.
  • Preferred Qualifications
  • Experience with File-AID.
  • Experience with EZtrieve.
  • Experience with CLIST and REXX automation.
  • Prior experience with legacy modernization or cloud migration projects.
  • Experience supporting financial services, insurance, healthcare, or government mainframe environments.
  • Critical Success Factors
  • Ability to quickly assess complex legacy environments.
  • Strong problem-solving and troubleshooting capabilities.
  • Excellent communication and documentation skills.
  • Ability to meet aggressive deadlines and deliver high-quality migration solutions under tight timelines.