Mainframe Application Developer & Support Engineer (COBOL)

What success looks like in this role:

This is a full‑time, permanent position for a Mainframe Application Developer & Support Engineer (COBOL) in a hybrid working model, requiring on‑site attendance at least three days per week in Milton Keynes.

We partner with major organisations across Financial Services, Communications, Media, Commercial, Transportation, and the Public Sector, delivering a broad portfolio of business solutions—including consulting, systems integration, outsourcing, network services, security, and enterprise‑class technologies.

Within our Managed Application Services function, we provide 24/7 support for mission‑critical applications. We are now seeking a skilled professional to join the team responsible for supporting and enhancing Command‑and‑Control services for our client. This role focuses primarily on the mainframe component of the solution, providing day‑to‑day operational support alongside software enhancements defined by the client.

Key Responsibilities

•    Identify issues and propose effective resolutions to support end users
•    Analyse and resolve problems relating to interfaces across multiple system components
•    Apply creativity and technical insight to deliver enhancements and new areas of functionality

You will be successful in this role if you have:

Must‑Have:
•    Strong experience in COBOL and mainframe application development
•    Experience of OS2200 Unisys mainframe technology
•    Proven background in supporting and maintaining mainframe operational systems
•    Solid understanding of batch processing, JCL, and mainframe utilities
•    Strong SQL or database scripting knowledge (mainframe or equivalent)
•    Experience debugging, troubleshooting, and analysing complex system interactions
•    Familiarity with structured development practices and Agile methodologies
•    Eligible to obtain UK Security Clearance (must meet residency requirements)
Preferred:
•    Experience working within large‑scale, mission‑critical environments
•    Exposure to integration between mainframe and distributed systems
•    Understanding of modern development and support frameworks
•    Ability to mentor junior team members and support continuous improvement
•    Experience in Public Safety/Emergency Services would be highly advantageous
Additional Information
•    This is a full‑time, permanent role.
•    You will be required to attend our site at least three days per week and therefore must live within commutable distance from Milton Keynes.
•    Candidates must have resided in the UK for a minimum of three years to qualify for security clearance. This requirement is non‑negotiable. You must be able to obtain and maintain the appropriate security clearance for this role.

WE ARE PROUD OF:

Unisys was named a Leader in the 2020 Gartner Magic Quadrant for Managed Workplace Services, North America.

Unisys won the 2020 Microsoft Global Partner of the Year Award in the Modern Workplace – Modern Endpoint Management category.

Unisys won the 2020 Asia-Pacific Stevie Awards in the categories of Innovation in Technology Management, Planning & Implementation and Innovation in Business-to-Business Products & Services.

Unisys was recognized as a Top 100 Global Outsourcing Company by IAOP for the 15th consecutive year.

Unisys was named to the Forbes America's Best Employers for Diversity 2021 list.

Unisys won the 2021 Artificial Intelligence Breakthrough Award for Best Chatbot Solution.

Unisys was named a Leader in the NelsonHall 2020 Next Generation End-User Computing Services report.

Unisys was named one of America's Best Employers for Women by Forbes in 2023.

WHY UNISYS:

Competitive compensation and benefits: Unisys offers competitive compensation packages and benefits to their employees, including healthcare, retirement plans, paid time off and compensation.

Innovative and challenging work: Unisys is a company that is constantly pushing the boundaries of technology, which means that you will have the opportunity to work on innovative and challenging projects.

Collaborative culture: Unisys has a collaborative and inclusive work culture, which means that you will have the chance to work with people from diverse backgrounds and learn from their expertise.

Employee development: Unisys is committed to investing in their employees' professional growth and development, offering training and development opportunities, mentorship programs, and leadership development programs.

Industry expertise: Unisys has deep expertise in various industries, including financial services, healthcare, government, and transportation. This means that you will have the opportunity to work on projects in your industry of interest and learn from experienced colleagues who understand the unique challenges and opportunities of your industry.

Social responsibility: Unisys is committed to social responsibility and sustainability, which means that you will have the opportunity to work for a company that is making a positive impact on the world

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Unisys is proud to be an equal opportunity employer that considers all qualified applicants without regard to age, caste, citizenship, color, disability, family medical history, family status, ethnicity, gender, gender expression, gender identity, genetic information, marital status, national origin, parental status, pregnancy, race, religion, sex, sexual orientation, transgender status, veteran status or any other category protected by law.

This commitment includes our efforts to provide for all those who seek to express interest in employment the opportunity to participate without barriers. If you are a US job seeker unable to review the job opportunities herein, or cannot otherwise complete your expression of interest, without additional assistance and would like to discuss a request for reasonable accommodation, please contact our Global Recruiting organization at [email protected] or alternatively Toll Free: 888-560-1782 (Prompt 4).  US job seekers can find more information about Unisys’  EEO commitment here.