Mainframe Operational Security Engineer

Closes on 20/11/2026BrusselsHybrid
Remuneration: 4.950 - 6.150 EUR/mo gross ·Freelance also possible

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Job description

We are looking for a Mainframe Operational Security Engineer to help keep a mainframe environment secure, compliant and resilient. You will work in a security squad that sets standards, supports infrastructure teams and resolves security incidents.

Your role

  • Manage access permissions outside IAM and maintain the RACF database manually or through automation.
  • Document security standards and assess new mainframe products before release.
  • Manage encryption tasks, including certificates and technical agents for hardware security modules.
  • Investigate and resolve security incidents with the squad, limiting operational disruption.
  • Provide audit evidence, address findings and identify security risks early.
  • Join the on-call rota for critical job failures outside business hours, approximately one week per month, including weekends and holidays.

You have

  • At least ten years of relevant experience.
  • A bachelor's degree.
  • The RACF Security Administrator certification.
  • English at C1 level.
  • RACF and its surrounding utilities.
  • Mainframe architecture.
  • Basic knowledge of JCL.
  • Basic knowledge of ISPF.
  • Basic knowledge of REXX.
  • Basic knowledge of SDSF.
  • Role-based security modelling.
  • AT-TLS.
  • Knowledge of digital certificates.
  • DB2 security.
  • IMS security, including database and transaction management.
  • MQ security.
  • Job scheduling.
  • Mainframe subsystem security, including spool, network, storage and SMF.
  • Public key infrastructure (PKI).
  • Mainframe CryptoCards.
  • Unix System Services.
  • Experience in cybersecurity.
  • Hands-on mainframe experience.

A plus

  • Dutch at C1 level.
  • French at C1 level.
  • The zSecure RACF certification.
  • Knowledge of the zSecure product suite.
  • Knowledge of the Control job scheduler.
  • Knowledge of COBOL.
  • Knowledge of Endevor.
  • Experience in the financial sector.
  • Analytical skills for navigating conflicting security rules.
  • Critical thinking when checking requests against security standards.
  • Problem-solving skills to trace errors to their root cause.
  • Creativity in designing solutions to compliance issues.
  • An agile mindset and ownership of your work within a team.
  • Proactivity in identifying and addressing risks.

Working at Neurho

Founded in 1998, Neurho is a Belgian IT and business consultancy. For more than 25 years, we have been helping banks, insurers, energy companies and public institutions in Belgium and Luxembourg with their transformation projects. At Neurho, you work on varied and challenging assignments, where your expertise is recognised and your growth encouraged. On top of your salary, you enjoy many extra-legal benefits, designed to suit your role, your needs and your personal wishes.

Neurho is committed to equal opportunity and welcomes every application, regardless of age, origin, nationality, gender, social background, beliefs or disability.