Reference documents

TREF reference documents


Setting-up of TREF:

The mandate, membership and composition and working procedures, as defined in 1994:

Reports from the Chair to the Finance Committee:


► Reports from the Chair to the Finance Committee - 2011-2019

Staff Rules & Regulations:

The CERN Staff Rules define and codify the legal relationship between the Organization and the members of the personnel; the CERN Regulations shall lay down the provisions governing the application of the Rules.

CERN Personnel Statistics:

The Five-Yearly Review (5YR):

In accordance with the CERN Staff Rules & Regulations, periodic reviews of the financial and social conditions of members of the personnel consist of a five-yearly general review of financial and social conditions and an annual review of basic salaries, stipends, subsistence allowances and family benefits.

The purpose of the five-yearly review is to ensure that the financial and social conditions offered by the Organization allow it to recruit and retain the staff members required for the execution of its mission from all its Member States. These staff members must be of the highest competence and integrity.


The five-yearly Review 2021 (Management proposal submitted for approval to Council in June 2020):

  •  Council Session 18 June 2020: “Five-yearly Review 2021, Management's proposal identifying the financial and social conditions to be reviewed” (CERN/FC/6422/RA-CERN/3506/RA)

Past reviews can be consulted here.

Code of Conduct

As part of the HR Strategy and global reflection on CERN values and common standards of behavior and in response to requests from various internal bodies, a Code of Conduct was introduced at CERN in 2010.  The Code is intended as a guide in helping all CERN contributors to understand how to conduct themselves, treat others and expect to be treated. It is based around the five core values of the Organization (integrity, commitment, professionalism, creativity and diversity).  The aim is to address issues and encourage behaviors in a positive and preventive manner.


CERN’s Diversity Programme was launched in 2011. The Programme covers five dimensions: nationality/culture, gender, age/generation, profession and individual difference.  The programme’s current objectives are to achieve a fair gender balance across all professional categories, to provide strong gender role models across the Organization, to improve career development processes to allow people to progress through both technical and managerial pathways, to re-launch workshops that bring people from diverse professions and generations together to share their experience on key aspects of life at CERN and to continually improve work-life balance and organise events to stimulate inclusiveness and mutual respect.  Robust efforts are also being made to recruit excellent people from the full range of our Member States

Diversity Programme –


The CERN Director-General created of a full-time position of Ombuds also in 2010.  The role of the Ombuds is to provide impartial advice and guidance concerning interpersonal problems or conflicts at work, to help resolve interpersonal disputes, to listen, share and examine preoccupations or problems, and to guide people at CERN in applying the CERN Code of Conduct.  All members of personnel have access to the services of the Ombuds and any other person working at, or on behalf of, CERN.