Accounts Payable Assistant (FAP-ACC-AP-2024-32-LD)

CERN - European Organization for Nuclear Research

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Company Description

At CERN, the European Organization for Nuclear Research, physicists and engineers are probing the fundamental structure of the universe. Using the world's largest and most complex scientific instruments, they study the basic constituents of matter - fundamental particles that are made to collide together at close to the speed of light. The process gives physicists clues about how particles interact, and provides insights into the fundamental laws of nature. Find out more on

Job Description


Do you have several years of experience in accounts payable? Join CERN and put your skills to use in an exceptional environment! We are looking for a positive, motivated and dynamic person who is able to handle large volumes of work and maintain flexibility, while remaining attentive to detail and being well organised.

You will join:

  • The Finance and Administrative Processes department (FAP), which is responsible for effectively and efficiently managing the financial resources and commitments of the Organization, and ensuring compliance with CERN’s financial rules and procedures.
  • The Accounting Services group (ACC), which is responsible for all accounting transactions of the Organization and includes the General Accounting, Accounts Payable, Accounts Receivable and Personnel Accounting sections.
  • The Accounts Payable section (AP), which receives all invoices and credit notes from suppliers. These are recorded, checked and authorised for payment. The section processes between 35 000 and 40 000 invoices per year.


Within the Accounts Payable section, you will gradually take on the following functions within the team:

  • Recording, checking and settling of invoices received by the Organization (35 000- 45 000 per year). For some suppliers with monthly invoicing and multiple orders, checking the invoices requires analysis in Excel.
  • Following up service provider and supply contracts in close collaboration with the technical managers, procurement officers and suppliers.
  • Analysing data and contributing to projects relating to accounts payable.
  • Coding and entering financial accounting entries related to payables, and monitoring supplier accounts.
  • Maintaining regular contact with various internal services and external parties.
  • Responding to a significant volume of ad hoc requests from both internal and external contacts (using a ticket system).


Higher administrative diploma or equivalent relevant experience in the field of finance and/or administration or a related field.


  • Experience in Accounts Payable or a Procurement environment.
  • Experience in an international environment would be an advantage.

Technical competencies:

  • Accounts payable.
  • Proficient in Excel.
  • Cost control: (cost accounting).
  • Financial reporting and analysis.

Behavioural competencies:

  • Managing self: working well autonomously; taking on activities and tasks without prompting.
  • Demonstrating accountability: working conscientiously and reliably; delivering on promises. Presenting information accurately and objectively.
  • Working in teams: building and maintaining constructive and effective work relationships. Contributing to promoting a positive atmosphere in the team through an optimistic and constructive attitude; addressing issues.
  • Demonstrating flexibility: adapting quickly and resourcefully to shifting priorities and requirements. Demonstrating a willingness to accept changing circumstances; supporting initiatives for change.

Language skills:

Spoken and written English and French: ability to understand and speak both languages in professional contexts.

Additional Information

Eligibility and closing date:

Diversity has been an integral part of CERN's mission since its foundation and is an established value of the Organization. Employing a diverse workforce is central to our success. We welcome applications from all Member States and Associate Member States.

This vacancy will be filled as soon as possible, and applications should normally reach us no later than 23:59 CEST 24.04.2024.

Employment Conditions

Contract type: Limited duration contract (5 years). Subject to certain conditions, holders of limited-duration contracts may apply for an indefinite position.

These functions require:

  • Work during nights, Sundays and official holidays, when required by the needs of the Organization. This is necessary for the book closing process but is required infrequently.

Job grade: 3-4

Job reference: FAP-ACC-AP-2024-32-LD

Benchmark Job Title: Process/Services Assistant

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