Application Modernisation Consultant (Mainframe, Gen, COBOL, Java, .NET)
Confirmed on the employer's own hiring board on Oct 14, 2026. First seen by Alion on Jul 18, 2026.
Hybrid - UK
Permanent
Help organisations modernise critical business systems
At TXP, we're specialists in solving complex technology challenges. As demand for legacy modernisation continues to grow, we're expanding our team and are looking for an experienced Legacy Conversion Consultant to support major application transformation programmes across both public and private sector clients.
This is a unique opportunity to combine deep technical expertise with innovative automation technology, helping organisations move away from legacy platforms and embrace modern architectures.
You'll work with TXP's proprietary migration tooling to analyse, convert and validate enterprise applications, while helping shape the future of our conversion methodologies and automation capabilities.
What you'll be doing
As a Legacy Conversion Consultant, you'll play a key role in delivering complex migration and modernisation projects, including:
- Analysing and assessing legacy applications, primarily developed in Gen.
- Executing application migrations using TXP's automated conversion tooling.
- Supporting the migration of applications to:
- Native COBOL environments (CICS, IMS-DC and DB2)
- Modern platforms including Java, Spring Boot, .NET, Angular and cloud technologies
- Defining migration approaches for databases, online transactions, batch processing and user interfaces.
- Validating converted applications to ensure quality, performance and functional equivalence.
- Collaborating with architects and technical teams to develop migration strategies and delivery roadmaps.
- Supporting proposals, Statements of Work and technical solution design activities.
- Contributing to the continuous improvement of TXP's migration tooling and delivery methodologies.
What we're looking for
We're interested in hearing from technology professionals who have experience in application modernisation, migration, conversion or platform transformation projects.
You'll bring experience in some of the following:
- COBOL, CICS, IMS-DC and DB2 environments
- Mainframe technologies and tooling including ISPF, SCLM, SPUFI and JCL
- Java, Spring Boot, .NET, Angular or cloud-native technologies
- Legacy application development and support
- Application migration, re-platforming or modernisation programmes
- Automation tooling, scripting or development
- CI/CD and DevOps tools such as Azure DevOps, Jenkins or GitHub Actions
Why Join TXP?
At TXP, our people are at the heart of our success. We're proud of our collaborative culture and our values:
- Client Focus - We put our clients at the heart of every decision.
- Adaptability - We embrace change and thrive in dynamic environments.
- Responsibility - We take ownership and deliver with integrity.
- Excellence in Delivery - We are committed to delivering outstanding results.
- Success & Celebration - We celebrate achievements and learn from every experience.
Benefits:
- 25 days annual leave (plus bank holidays).
- An additional day of paid leave for your birthday (or Christmas eve).
- Salary sacrifice, matched employer contributed pension (4%).
- Life assurance (3x).
- Access to an Employee Assistance Programme (EAP).
- Private medical insurance through our partner Aviva.
- Cycle to work scheme.
- Corporate eye-care vouchers.
- Access to an independent financial advisor.
- 2 x social value days per year to give back to local communities.
Grow with us:
Work on exciting new projects. If you want to avoid getting stuck with the mundane, you’re in the right place. We work in many sectors with fantastic clients, so you’ll always be working on something exciting and challenging.
Career growth - we’ve got you!
We recognise that you might have a career path planned out and you might need some support to help you move forward. We’re here to support you and make the most out of your time with us, through challenging work, opportunities to grow and learning and development opportunities.
Be part of the TXP growth journey.
We are a high growth, fast paced environment. We currently have 200+ employees and work with clients across the UK. Joining TXP means you’ll be part of that. Interested?
If you're passionate about application modernisation and want to work at the forefront of legacy transformation, we'd love to hear from you.
Apply today and help organisations unlock the future of their technology platforms with TXP.