1

Mainframes Developer Jobs in Missouri (NOW HIRING)

... mainframe-connected applications, and enterprise geospatial platforms supporting hundreds of ... You will work alongside cloud engineers, DevSecOps engineers, and our compliance and authorization ...

Drives modernization from legacy INFOR mainframe systems to SAP and cloud-native architectures ... Strong background in data governance, security, DevOps, CI/CD, and cloud platforms. * Effective ...

Drives modernization from legacy INFOR mainframe systems to SAP and cloud-native architectures ... Strong background in data governance, security, DevOps, CI/CD, and cloud platforms. * Effective ...

Drives modernization from legacy INFOR mainframe systems to SAP and cloud-native architectures ... Strong background in data governance, security, DevOps, CI/CD, and cloud platforms. * Effective ...

L2 Engagement Leader

Saint Louis, MO · On-site

$80K - $158K/yr

Leveraging our holistic portfolio of capabilities in consulting, design, engineering, and ... CA7, Autosys, Control-M (familiarity with at least two). • Mainframe environment: JCL, COBOL, DB2 ...

... Mainframe application, migration of linux servers and lead Mastercard in DevOps automation and best practices. • Are you a born problem solver who loves to figure out how something works? • Do ...

... Engineering, Business, or other related discipline. At least 7 years of overall database related work experience. DB2 Database experience Mainframe experience Database Definition Language (DDL) Be ...

Showing results 41-60

Mainframes Developer information

What is the difference between Mainframes Developer vs Mainframes Analyst?

AspectMainframes DeveloperMainframes Analyst
Required CredentialsTypically a degree in Computer Science or related field; certifications like IBM Certified SpecialistSimilar credentials; often holds certifications in mainframe systems and analysis
Work EnvironmentDevelops, codes, and tests mainframe applications in a software development settingAnalyzes existing mainframe systems, gathers requirements, and supports system improvements
Employer & Industry UsageUsed by banks, insurance companies, and large enterprises for application developmentEmployed in similar industries for system analysis, troubleshooting, and process optimization

While both roles require knowledge of mainframe systems and similar credentials, Mainframes Developers focus on creating and maintaining mainframe applications, whereas Mainframes Analysts analyze existing systems to improve performance and efficiency. Both roles are vital in large enterprise IT environments.

Is a mainframes developer a good career?

A mainframes developer is a specialized IT professional who maintains and develops applications on mainframe systems, which are used by large organizations for critical data processing. The role offers stable employment, competitive salaries, and opportunities to work with legacy systems and mainframe programming languages like COBOL. However, it requires specific skills and certifications, and the field may have limited growth compared to emerging technologies.

Is a mainframes developer still in demand?

Mainframes developers are still in demand in industries such as finance, government, and healthcare that rely on legacy systems. They typically work with COBOL, JCL, and mainframe environments, and demand persists due to the ongoing need to maintain and upgrade existing mainframe applications. However, the number of new positions is limited compared to emerging technologies, and skills in mainframe modernization are increasingly valued.

What does a mainframes developer do?

A mainframes developer designs, codes, tests, and maintains applications running on mainframe computers, often using languages like COBOL, PL/I, or Assembler. They ensure the stability, security, and efficiency of large-scale enterprise systems, frequently working with legacy code and mainframe-specific tools in a structured environment.

What are popular job titles related to Mainframes Developer jobs in Missouri?

For Mainframes Developer jobs in Missouri, the most frequently searched job titles are:

What job categories do people searching Mainframes Developer jobs in Missouri look for?

The top searched job categories for Mainframes Developer jobs in Missouri are:

Infographic showing various Mainframes Developer job openings in Missouri as of August 2026, with employment types broken down into 81% Full Time, 5% Part Time, and 14% Contract. Highlights an 79% Physical, 6% Hybrid, and 15% Remote job distribution.

Computer Network Support Specialist

Seneca Holdings

Kansas City, MO • On-site

Full-time

Medical, Dental, Retirement, PTO

This job post has expired today. Applications are no longer accepted.


Job description

White Pine Innovations is part of the Seneca Nation Group (SNG) portfolio of companies. SNG is the federal government contracting business wholly owned by the Seneca Nation. SNG meets mission-critical needs of federal civilian, defense, and intelligence community customers across a variety of domains. The SNG portfolio receives shared services support from its parent company Seneca Holdings and is comprised of multiple companies that participate in the Small Business Administration 8(a) program. To learn more visit www.senecanationgroup.com and follow us on LinkedIn.

The Seneca Nation Group companies offer competitive compensation and a strong benefits package including comprehensive medical and dental care, matching 401K, paid time off, flexible spending accounts, disability coverage, and other benefits that help provide financial protection for you and your family. We pride ourselves on our collaborative work environment and culture which embraces our mission of providing financial and non-financial benefits back to the members of the Seneca Nation.

White Pine Innovations is seeking a Computer Network Support Specialist (Tier 1) to support our government client in Kansas City, MO. The Computer and Information Systems Manager will provide data center IT support in a 24x7x365 environment and second-tier support to end users for either server, or mainframe applications or hardware. They are also responsible for interacting with network services, software systems engineering, and/or application development to restore service and/or identify and correct core problems. 

Essential Duties and Responsibilities:

  • Provide Tier II support
  • Perform Production Control duties using state of the art scheduling packages
  • Perform System Administration duties in a mainframe and midrange environment.
  • Manage and perform the steps/actions required in the Remedy ticketing system.
  • Maintain current and high level of technical skill in field of expertise.
  • Perform and/or oversee security of the data center and escorting of personnel to designated areas of the computer room.
  • Complete all daily logs and journals associated with maintaining computer room security and control; shift turnover information and daily activity notes.
  • Support Disaster Recovery (DR) exercises
  • Ensure customer satisfaction through the resolution of all issues and problems reported
  • Report, document and escalate customer contacts; regarding issues, problems, and information given.
  • Perform research and/or analysis on constantly changing or atypical administrative and/or program-related IT issues or problems, such as needed for regularly changing organizational requirements.
  • Determines pertinent issues and collects relevant information from a wide variety of sources.
  • Obtain successful results through research of IT information, development of ideas/concepts, and application of problem solutions on large and small-scale servers.
  • Develop and present written/oral presentations for the recommendation of changes and solutions to programs or procedures
  • Plan and coordinate maintenance and upgrades in support of NITC Infrastructure and customers.
  • Optimize the functionality of networks and systems and reallocate system resources.
  • Diagnose and recover failed systems and applications individually or with assistance from higher level or application matter experts.
  • Perform research in the development of useful business requirements.
  • Execute and modify jobs /programs through the use of multiple scheduling packages.
  • Routinely performs a variety of Computer Operations functions such as system IPL's/Reboots, Backups, Configuration Modifications, troubleshoot failures, recycle applications, initiate and perform production scheduling functions. Research and resolve environmental and facilities power issues within the prescribed timeframes provided by the facilities team. 
  • Fill out and complete the logs required during the daily security checks.
  • Participating in a minimum of quarterly training on the starting of generators manually and switching PDU's from the loss power source to the available power source is considered a routine function to be performed successfully with no infractions.
  • Demonstrate capable skills required to perform duties that are critical to maintaining a stable infrastructure and customer access.
  • Other duties as assigned

Desired Qualifications:

  • Bachelor's degree in computer science field or an Associate's degree technology field and 2+ years' experience in a similar position.
  • 5+ years' experience in data center support related field.
  • Ability to perform system administration for Linux, Windows and Mainframe systems.
  • Knowledge of networks, switches and other peripherals.
  • Knowledge of storage appliances, data base and applications servers.
  • Demonstrated successful project management skills.
  • Requires ITIL Foundations V3 certification within 90 days of hire.