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
Key Qualifications
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