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Senior Mainframe Developer Jobs in Washington (NOW HIRING)

TechWish

Senior Java Developer

Sterling, VA · On-site

$57 - $72.50/hr

Job Summary : TechWish is seeking a Senior Java Developer to design and develop software ... mainframes that queries and retrieves data using SQL, JNDI, JDBC template and through Object ...

Peraton

Senior Software Test Engineer

Lanham, MD · Hybrid

$110K - $143K/yr

Responsibilities Peraton is seeking a Senior Software Test Engineer to join our team of qualified ... Conduct functional and/or integration testing of multiple programs in an IBM mainframe, client ...

Peraton

Senior Software Test Engineer

Lanham, MD · Hybrid

$110K - $143K/yr

Responsibilities Peraton is seeking a Senior Software Test Engineer to join our team of qualified ... Conduct functional and/or integration testing of multiple programs in an IBM mainframe, client ...

Peraton

Senior Software Test Engineer

Lanham, MD · On-site

$80K - $128K/yr

Responsibilities Peraton is seeking a Senior Software Test Engineer to join our team of qualified ... Conduct functional and/or integration testing of multiple programs in an IBM mainframe, client ...

USM

Sr Java Developer

Washington, DC · On-site

$64.75 - $82.75/hr

Position title: Sr Java Developer Location: Washington, DC (Need Local Only) Duration: 6 Months ... At least 8 years of mainframe-based application development experience Demonstrated knowledge of ...

InterSources Inc

Senior JAVA Developer

Washington, DC · On-site

$64.50 - $82.25/hr

The Senior JAVA Developer will design, develop, and test applications using JAVA technologies ... with mainframe CICS containers and channels using JCA connector • Knowledge of Continuous ...

AHU Technologies Inc

Sr Java Developer

Washington, DC · On-site

$80 - $85/hr

TITLE: Sr Java Developer LOCATION: Washington, DC/ Onsite Employment type: Contract w2/1099/C2C ... Desired 1 Year · Working with mainframe CICS containers and channels using JCA connectors. Desired ...

AHU Technologies, Inc.

Sr Java Developer

Washington, DC · On-site

$80 - $85/hr

TITLE: Sr Java Developer LOCATION: Washington, DC/ Onsite Employment type: Contract w2/1099/C2C ... Desired 1 Year • Working with mainframe CICS containers and channels using JCA connectors.

Peraton

Senior Test Automation Engineer

Lanham, MD

$80K - $128K/yr

Design, develop, and maintain automated test frameworks and scripts for mainframe and web ... DevOps, and product owners to ensure automation aligns with release goals * Provide guidance and ...

Peraton

Senior Test Automation Engineer

Lanham, MD · On-site

$80K - $128K/yr

Design, develop, and maintain automated test frameworks and scripts for mainframe and web ... DevOps, and product owners to ensure automation aligns with release goals * Provide guidance and ...

Peraton

Senior Test Automation Engineer

Lanham, MD · On-site

$80K - $128K/yr

Design, develop, and maintain automated test frameworks and scripts for mainframe and web ... DevOps, and product owners to ensure automation aligns with release goals * Provide guidance and ...

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Senior Mainframe Developer information

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How much do senior mainframe developer jobs pay per hour?

As of Sep 2, 2026, the average hourly pay for senior mainframe developer in Washington is $65.30, according to ZipRecruiter salary data. Most workers in this role earn between $61.25 and $71.35 per hour, depending on experience, location, and employer.

What is a senior mainframe developer?

Senior Mainframe Developers are experienced professionals who design, develop, and maintain mainframe systems—large-scale computers used by organizations for critical applications, bulk data processing, and enterprise resource planning. They are proficient in languages like COBOL, JCL, and Assembler, and often work with databases and transaction processing systems. Their responsibilities include troubleshooting system issues, optimizing performance, mentoring junior developers, and ensuring the reliability and security of mainframe operations.

What are some common challenges faced by senior mainframe developers when integrating legacy systems with modern technologies?

Senior Mainframe Developers often encounter challenges when integrating legacy mainframe systems with newer technologies such as cloud platforms, APIs, or microservices. These challenges include ensuring data consistency, maintaining system security, and minimizing downtime during migrations. Collaboration with cross-functional teams, such as infrastructure engineers and application developers, is key to developing seamless integration solutions. Staying up-to-date with modernization tools and best practices can help address these complexities and support the organization's digital transformation goals.

What are the key skills and qualifications needed to thrive as a senior mainframe developer, and why are they important?

To thrive as a Senior Mainframe Developer, you need deep expertise in mainframe programming languages (like COBOL, JCL, and PL/I), systems analysis, and a strong understanding of legacy application architectures, typically supported by a degree in computer science or related experience. Familiarity with tools such as IBM z/OS, DB2, CICS, and version control systems is essential, along with relevant certifications like IBM Certified System Programmer. Excellent problem-solving, communication, and leadership skills help you collaborate effectively and mentor junior developers. These skills are crucial for maintaining mission-critical systems, ensuring reliability, and guiding modernization efforts in complex enterprise environments.

What are the most commonly searched types of Mainframe Developer jobs in Washington?

The most popular types of Mainframe Developer jobs in Washington are:

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

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

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What cities in Washington are hiring for Senior Mainframe Developer jobs?

Cities in Washington with the most Senior Mainframe Developer job openings:

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Senior Mainframe Developer jobs near you
Infographic showing various Senior Mainframe Developer job openings in Washington as of August 2026, with employment types broken down into 83% Full Time, 4% Part Time, and 13% Contract. Highlights an 82% Physical, 4% Hybrid, and 14% Remote job distribution, with an average salary of $135,817 per year, or $65.3 per hour.

Lead Mainframe Computer Operator

Chameleon Integrated Services

Washington, DC • On-site

Contractor

Medical, Dental, Vision, Life, Retirement, PTO

Posted 8 days ago

Job description

​ ​​​
 
                                                                               
We are a growing information technology company that offers its employees a culture of success, the chance to work on revolutionary federal IT infrastructure, and the opportunity to grow alongside cutting-edge technology that is reshaping the industry. We are seeking forward-thinking candidates that have strong experience in operational support and can help take to the next level in a proactive stance.
 
Chameleon Integrated Services has expertise in operations management, quality systems, data operations and cybersecurity. We secure some of the most sensitive data for the Department of Defense and for other U.S. federal government agencies. We are known for the great care we take with clients and employees, and we believe in promoting from within.
  
We offer a Full Benefits package including:
  • Competitive Employee Health Insurance options including dental
  • 100% company paid vision plan
  • 401K plan with generous company match and no vesting period
  • 100% company paid life insurance
  • 100% company paid long and short-term disability insurance
  • Training allowance
  • PTO and more
Lead Mainframe Computer Operator
This role requires substantive hands-on experience in a mainframe data center environment with all three of the following and must be demonstrated on the resume:
  • High-speed laser printers
  • Impact printers
  • Burster equipment
Candidates must also have demonstrated shift leadership, senior operator responsibilities, work coordination, troubleshooting/escalation responsibility, or similar experience in the resume.
Required Technical/Operational Experience:
  • Operating and maintaining mainframe-connected high-speed laser and impact printers and bursters.
  • Setting up printers based on instructions from mainframe computer consoles.
  • Loading paper, toner, developer, and other required print media and supplies.
  • Removing, organizing, and preparing completed print jobs for distribution.
  • Monitoring print and mainframe processing and responding to equipment or system malfunctions.
  • Coordinating with operating-system or printer-maintenance personnel when malfunctions require escalation.
  • Submitting, scheduling, and tracking jobs using JCL within TSO.
  • Working within TSO/ISPF environments for job scheduling, monitoring, and troubleshooting.
  • Supporting Production Control activities and report distribution.
  • Handling boxes of paper/forms and maintaining an orderly printer-production area.
Schedule:
One Lead assigned to each shift:
  • Shift 1: 7:00 AM–3:30 PM, Monday–Friday
  • Shift 2: 3:00 PM–11:30 PM, Monday–Friday

“We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability or protected veteran status”

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