What we know
Mainframe consulting at Asist is hands-on work on the systems that still run critical processing - not slideware. We have spent decades in public, finance, and industrial environments on IBM software development, operations, optimisation, and controlled modernisation.
Technical scope
- Application development and maintenance: COBOL, PL/I, REXX, and related languages on z/OS.
- Batch and online: JCL, schedulers, CICS, and transaction paths your operations rely on.
- Data: DB2 and data access patterns, performance, and change impact.
- Integration: Connecting mainframe workloads to APIs, messaging, and distributed channels.
Program types we support
- Steady application management and enhancement backlogs.
- Legacy transformation and migration with disciplined release management.
- Regulatory and audit-driven change with traceable delivery.
- Performance tuning, incident response, and operational stabilisation.
How we work with you
You stay in charge of priorities and acceptance. Asist provides experienced people - employed and supported by us - who join your teams, tools, and ceremonies. Engagements are shaped to the assignment, not forced into a single product template.
Ways to engage
- Projectsourcing: Flexible capacity for a fixed period or defined scope - ideal for peaks, releases, or short programs.
- Embedded consultants: Longer placements inside your delivery organisation when you need continuity and domain build-up.
- Program and project support: Experienced coordination when mainframe work sits inside a larger change portfolio.
- Team as a Service: When the need outgrows individual roles, we can stand up a led squad with shared delivery accountability.
Getting started
- Clarify the gap: Skills, duration, environment access, and what success looks like.
- Match profiles: Shortlist, interview if you want, agree ways of working.
- Deliver and review: Regular alignment on progress, quality, and fit.
Asist and Capyx Group
Asist is part of Capyx Group - a Brussels-based IT services group founded in 2013, with consultants across implementation, maintenance, cybersecurity, and AI. Together we cover the full lifecycle: keep legacy reliable, integrate it with the wider landscape, and innovate where it makes business sense.
Capyx describes the reality many of our clients face: core systems built over years cannot always be replaced without high cost and operational risk. The group helps maintain and develop those environments toward open components that fit the full IT estate - the same direction Asist pursues on the mainframe every day.
Through the group you also gain access to expertise beyond the mainframe stack: other development languages and security. That combination is increasingly useful in the modern mainframe world, where core processing connects to APIs, distributed services, and stricter protection requirements - so integration and hardening do not sit in a separate silo from your z/OS delivery.
Why organisations choose us
- Depth on IBM mainframe since 1995 - not a generalist bench learning on your time.
- Sector experience in banking, insurance, public sector, and industry.
- Local delivery in Belgium with Dutch, French, and English-speaking teams.
- Broader toolkit when you need it: Asist LX for landscape insight, observability services, or a managed squad.