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Senior Mainframe Developer Jobs in Dayton, MD (NOW HIRING)

System One

Java Mainframe Developer

Vienna, VA · Remote

$58.50 - $74.75/hr

Java Developer Location: Remote Type: Contract Responsibilities * Design, develop, and enhance complex software applications supporting mission-critical, time-sensitive initiatives focused on ...

System One

Java Mainframe Developer

Vienna, VA · Remote

$58.50 - $74.75/hr

Java Developer Location: Remote Type: Contract Responsibilities * Design, develop, and enhance complex software applications supporting mission-critical, time-sensitive initiatives focused on ...

System One

Java Mainframe Developer

Vienna, VA · Remote

$58.50 - $74.75/hr

Java Developer Location: Remote Type: Contract Responsibilities * Design, develop, and enhance complex software applications supporting mission-critical, time-sensitive initiatives focused on ...

System One

Java Mainframe Developer

Vienna, VA · Remote

$58.50 - $74.75/hr

Java Developer Location: Remote Type: Contract Responsibilities * Design, develop, and enhance complex software applications supporting mission-critical, time-sensitive initiatives focused on ...

System One

Java Mainframe Developer

Vienna, VA · Remote

$58.50 - $74.75/hr

Java Developer Location: Remote Type: Contract Responsibilities * Design, develop, and enhance complex software applications supporting mission-critical, time-sensitive initiatives focused on ...

System One

Java Mainframe Developer

Vienna, VA · Remote

$58.50 - $74.75/hr

Java Developer Location: Remote Type: Contract Responsibilities * Design, develop, and enhance complex software applications supporting mission-critical, time-sensitive initiatives focused on ...

Creative G C

Mainframe z/OS System Programmer

Columbia, MD · Remote

$56.25 - $71.75/hr

As an US Citizen and as a Senior System Programmer (Mainframe) supporting IBM z15 and z16 mainframe and z/OS 2.5 or higher operating system. As part of IBM zCloud resource pool, supporting the zCloud ...

Serigor, Inc.

Senior .NET Developer (Onsite)

Columbia, MD · On-site

$53.75 - $70.75/hr

Job Title: Senior .NET Developer (Onsite) Location: Columbia, MD Job Type: Full-Time * We are ... Experience supporting Mainframe modernization, automated code conversion, and enterprise ...

Avance Consulting Services

MainFrame

Mclean, VA · On-site

My name is Ahmed and I am a Sr. Technical Recruiter with Avance Consulting. We are a leading ... It provides strategic business consulting, technology, engineering and outsourcing services to help ...

TheStaffed

Sr DataStage Engineer

Mclean, VA · On-site

Our client is seeking a Senior DataStage Engineer to design, develop, and maintain enterprise ETL ... Modernize legacy mainframe batch processes by translating existing COBOL/JCL logic into DataStage ...

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All JobsMainframe Developer JobsSenior Mainframe Developer JobsSenior Mainframe Developer Jobs in Dayton, MD

Senior Mainframe Developer information

See Dayton, MD salary details

$37

$56

$64

How much do senior mainframe developer jobs pay per hour?

As of Sep 5, 2026, the average hourly pay for senior mainframe developer in Dayton, MD is $56.16, according to ZipRecruiter salary data. Most workers in this role earn between $52.69 and $61.35 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 cities near Dayton, MD are hiring for Senior Mainframe Developer jobs?

Cities near Dayton, MD with the most Senior Mainframe Developer job openings:

Senior Mainframe Developer jobs near you
Infographic showing various Senior Mainframe Developer job openings in Dayton, MD as of August 2026, with employment types broken down into 79% Full Time, 3% Part Time, and 18% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution, with an average salary of $116,808 per year, or $56.2 per hour.

Mainframe Storage Administrator

3B Staffing LLC

Washington, DC

Full-time

Re-posted 16 days ago

Job description

Degree required:

Bachelor's degree or equivalent experience

The ideal candidate has over 16 years of experience managing advanced technology or service projects, overseeing the full systems engineering lifecycle, and developing implementation and integration plans, test plans, and training materials.

Mainframe Storage Administrator for an on-site role in Washington, DC.

Position Description: The Senior Mainframe Storage Administrator shall have 8+ years of experience managing and maintaining the storage systems for IBM System Z. Responsibilities include managing storage allocation, performance tuning, backup and recovery, and disaster recovery fail-over protocols.

Position Responsibilities:

Leads the adoption or implementation of an advanced technology or platform.

Expert on the functionality or usage of a particular system, platform, or technology product.

Serves as a consultant to clients, guiding the efficient use or adoption of a particular IT product or platform.

Creates implementation, testing, and/or integration plans.

Demonstrates expertise in a particular IT platform or service, allowing for maximum IT investment.

General skills

Must have

16+ yrs. leading advanced technology projects or service projects

10+ years of experience

16+ yrs. full system engineering lifecycle

10+ years of experience

16+ yrs. creating implementation/integration plans, test plans, and training materials

10+ years of experience

16+ yrs. hands-on experience in specific product or IT platform

10+ years of experience

Nice to have

Industry certification/training in specific IT product/platform or service

Required Skills:

Extensive knowledge of IBM z/OS system software, IBM utilities, and 3rd party software.

Extensive knowledge working with IBM, Dell/EMC, and Hitachi disks.

Extensive knowledge of managing local and remote replication, initialization, and full volume backup/archive/restore.

Extensive knowledge working with tape silos (automatic tape libraries).

Extensive knowledge of IBM and CA virtual tape storage.

Minimum Education/ Certification Requirements:

Bachelor's degree in Information Technology or related field, or equivalent experience

Training or certification in a particular product or IT platform/service, as required

Skills Matrix:

Skill | Required/ Desired | Years of Experience

16+ yrs. leading advanced technology projects or service projects | Required | 16

16+ yrs. full system engineering lifecycle | Required | 16

16+ yrs. creating implementation/integration plans, test plans, and training materials | Required | 16

16+ yrs. hands-on experience in specific product or IT platform | Required | 16

Bachelor's degree or equivalent experience | Required

Industry certification/training in specific IT product/platform or service | Nice to have

Apply