Mainframe Technical Expert

Publication Date:  Nov 27, 2023
Ref. No:  484934

Warszawa, Poland, PL, 00-103

Who we are.
We are a team of passionate experts with a clear ambition: applying digital technology to advance what matters for our clients and society.
Together we create reliable and responsive digital foundations for the world’s businesses, institutions, and communities.
Learn more on Advancing what matters

The future is our choice
At Atos, as the global leader in secure and decarbonized digital, our purpose is to help design the future of the information space. Together we bring the diversity of our people’s skills and backgrounds to make the right choices with our clients, for our company and for our own futures.

We are currently looking for Mainframe Technical Expert.

As a Mainframe Technical Expert Online you will have the responsibility to deliver 3rd level technical support of mainframe online transaction systems and software.


Roles and Responsibilities:

  • Software lifecycle management: maintenance and replacement of software;

  • Exploring new product features which can benefit the customer as well as Atos;

  • Third line support in case of software errors;

  • Assist customers in using the software products;

  • Incident, change and problem handling;

  • Configuration and customization;

  • Setup of parameters;

  • Setup of customer dependent parts (e.g. user administration, product calendar, authorization matrix);

  • Documenting;

  • Communication with customers and vendors;

  • Participation/contribution to technical projects.


Sounds exciting? Match your experience to needed skills


Required Skills and Experience:

  • In depth knowledge and understanding of z/OS and related product software z/OS;

  • In depth knowledge and understanding of CICS, MQ and IDMS;

  • Programming knowledge of REXX and JCL;

  • Knowledge of Cobol and/or Assembler is an advantage;

  • University degree in Computer Science or related subject;

  • More than 3 years’ of verifiable experience with mainframe operations and monitoring;

  • At least 5-8 years’ of verifiable experience as IBM mainframe specialist (zSeries);

  • Excellent command of English; Dutch is a plus;

  • Ability to work well as a team member; 

  • Methodical and disciplined approach to work; 

  • Excellent analytical skills and problem solving capabilities; 

  • Stress resistant in case of Major Incident- and/or emergency situations; 

  • Good planning and organisational skills; 

  • Very good communication abilities; 

  • Ability to deal with multi-task issues; 

  • Initiative and good learning abilities.



Our Offering:

  • Wellbeing programs & work-life balance - integration and passion sharing events
  • Private medical and dental care
  • Benefits platform – shopping, cinema, sport etc.
  • Co-funding of sport activities, e.g. Multisport & OK system cards, b-active program
  • Courses and certifications e.g. Google Cloud, AWS, ITIL
  • Conferences and Expert Communities
  • Gift packages for special occasions: Easter, Christmas, Children’s Day
  • Appreciation for seniority: additional days off, Atos Jubilee gifts
  • Remote working or commuting allowance, relocation package
  • Charity and eco initiatives
  • Work shifts of 8 hours covering the time range between 08h00 and 18h00
  • Flexibility and ability to be part of an on-call rota (standby).

*Your benefits could vary depending on employment contract type



Please, attach your CV in English

If you are curious about this position and wish to find out more, don’t hesitate and contact our recruiter Anna. She will be happy to answer all your questions.



Here at Atos, diversity and inclusion are embedded in our DNA. Read more about our commitment to a fair work environment for all.

Atos is a recognized leader in its industry across Environment, Social and Governance (ESG) criteria. Find out more on our CSR commitment. 
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Learn more about us
At Atos, we embrace diversity as the ultimate engine of ingenuity for our clients, and we constantly strive to create a culture where people feel supported and encouraged. Read more about our commitment here

Whether it is fighting climate change, promoting digital inclusion, or ensuring trust in data management – tech for good sits at the core of our identity. With numerous global recognitions for our ESG practices, we are committed to building a better future for all by harnessing the power of technology. Learn more here