Travailler à Genève

On mission at CERN: a practical guide to preparing your stay

10 May 2026

Every year, thousands of scientists, engineers, technicians and PhD students converge on CERN for missions ranging from a few days to several years. The campus is huge, the sites are multiple, the human ecosystem is international and daily life unfolds across two countries. First-time visitors can find the experience disorienting.

This guide is written for those preparing a mission stay. It covers the essentials: understanding the CERN sites, organising your arrival, choosing where to stay, and knowing where to get a coffee at 10 pm after a data-taking shift. We write this as Pays de Gex hosts, just minutes from Prévessin and Meyrin — so with an admittedly situated point of view, but also a practical one.

CERN at a glance: two main sites and many experiments

CERN (European Organization for Nuclear Research) sits across the French-Swiss border. Two sites concentrate most of the human activity:

Meyrin site (Switzerland). The “historical heart” of CERN, founded in the 1950s. You’ll find the main building (logistical hub), most of the offices, restaurant 1 (“R1”), the library, the auditorium, the central services and several accelerators. The Science Gateway, CERN’s public visitor centre, opened here in 2023.

Prévessin site (France). More recent, it grew with the rise of the LHC experiments. It hosts some of the major experimental halls, offices, a restaurant (R2) and technical facilities.

And all around, scattered underground, the rings of the accelerators, including the famous LHC whose circumference passes under French territory in the Pays de Gex. Depending on your project, you may also visit the experimental caverns (ATLAS, CMS, ALICE, LHCb) accessible from various surface points.

Site access and badge

CERN access requires a personal access card issued by the Registration service on the Meyrin site. For short-invitation visitors, your CERN host registers your visit in advance; you collect the card on arrival at Reception.

The main entrance to the Meyrin site is Entrance B, with reception in building 33 (registration also available in building 55), accessible 24/7 (permanent guarding). Other entrances have variable opening hours. Entrance B is also where keys to the CERN Hostel and Saint-Genis Hostel can be picked up outside reception hours.

A practical tip: double-check the building number and office of your host or contact before you arrive. CERN has hundreds of buildings, and even with GPS it’s easy to spend the first hour going in circles.

Three accommodation options

1. The CERN Hostel (Meyrin and Saint-Genis-Pouilly sites)

The CERN Hostel is the most direct option for short stays (a few days to a few weeks). Two locations:

  • Meyrin site (buildings 38 and 39): on the campus itself, ideal for minimising commute time.
  • Saint-Genis-Pouilly site: Foyer Résidence Schuman, 340 rue de l’Europe, in Saint-Genis-Pouilly on the French side. 151 individual rooms available to CERN users.

Booking via the CERN Housing Services platform. Reception in building 39 (Meyrin) handles administration for both sites.

Heads-up: high demand in peak season (major conferences, technical stops), so book early. Rooms are functional, well suited to a simple work stay.

2. The CERN shuttle between Saint-Genis-Pouilly and Meyrin

If you stay at the Saint-Genis Hostel, you can use the CERN shuttle morning and evening between the hostel and Meyrin. The “Navette CERN” travel pass is issued by the Saint-Genis hostel. A simple solution if you don’t have a car and your hours match the shuttle schedule.

3. Private accommodation in the Pays de Gex (longer or more comfortable stays)

For multi-week missions, family stays, or simply higher comfort needs, private accommodation in the Pays de Gex is often a better fit. Several reasons:

  • Space and autonomy: a flat or whole house lets you cook, host colleagues, set up a real quiet workspace. Far more comfortable than a hostel room for a long mission.
  • Family: if you bring relatives, a whole place becomes essential.
  • Immediate proximity to CERN: from Saint-Genis-Pouilly or Prévessin-Moëns you’re a few minutes from Prévessin; from Ferney-Voltaire, a few minutes from Meyrin via the border crossing.
  • Often more economical over the duration than central Geneva hotels.

That’s exactly the audience we serve at HEBERGENEVE: visitors on mission who want a clean, well-equipped place to stay, with parking and a responsive contact. Our Pays de Gex properties are positioned within easy reach of both sites.

Getting around between accommodation, CERN and Geneva

By car: the most flexible option. Typical drive between Saint-Genis-Pouilly and the Meyrin site: through the Meyrin-Mategnin border crossing, then a few minutes. Parking is available on CERN sites with the appropriate badge.

Tram line 18 from central Geneva runs directly to the Meyrin site. Ideal if you stay in town and don’t need a car.

Bicycle: many cycle paths between Pays de Gex villages and the campus. CERN provides a bike-loan scheme (Mobility) for internal travel between Meyrin and Prévessin.

TPG cross-border buses (lines F, Y): useful for reaching central Geneva from Ferney-Voltaire or Saint-Genis-Pouilly.

Daily life on site

Eating at CERN. Restaurant 1 (R1) on the Meyrin site is open all day and late into the evening — it’s the social epicentre of CERN. R2 (Prévessin) is quieter. Both serve varied food at subsidised rates for badge holders. There’s also a sandwich kiosk in building 504 and several cafés around the site.

Groceries. On the French side, supermarkets in Saint-Genis-Pouilly (Casino, Carrefour Market), Ferney-Voltaire (Migros France, Carrefour) and Gex. Opening hours follow French rules (often open Sunday morning), unlike Switzerland where most shops close on Sundays.

Banking and currency. Watch the exchange rate as soon as you cross the border. Many CERN visitors open a multi-currency account (Revolut, Wise, a Swiss bank such as UBS) for the duration of their mission. ATMs accessible in Saint-Genis, Ferney and on CERN sites themselves.

Mobile. Excellent coverage everywhere. European plans usually cover Switzerland — check with your operator.

Sport and wellbeing. CERN has many sports clubs open to users (running, football, ski, climbing…). Outside, gyms in Saint-Genis and Ferney, swimming in Divonne, and plentiful hikes in the Jura nearby (the Crêt de la Neige is 30 minutes from the site).

Enjoying the region after work

Central Geneva is 15–20 minutes from the Meyrin site by car or tram. Perfect for dinner in Pâquis, an evening concert, a visit to the Museum of Art and History or the Bodmer Foundation.

On the Pays de Gex side, don’t miss the Ferney-Voltaire market on Saturday morning (the largest in the region), the Voltaire’s Château 5 minutes from the Meyrin site, or a quiet dinner in Gex facing the Jura.

For the outdoors, a weekend at Monts Jura (Mijoux, Lélex, Crozet) or by Lake Geneva (Yvoire, Évian) is easy to plan. And Mont Blanc is about an hour away for the more adventurous.

Plan your CERN mission with HEBERGENEVE

We regularly host CERN visitors. Our approach:

  • Properties close to the sites (Saint-Genis-Pouilly, Prévessin-Moëns, Ferney-Voltaire, Gex).
  • Equipped for remote work: fast Wi-Fi, dedicated workspace, a proper dining table.
  • Parking included with every property.
  • 7-day responsive on-call — essential when your schedule is packed.
  • Long-stay arrangements possible on selected properties (case by case).

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Article written in May 2026 from CERN’s public information. For operational details (housing, shuttle, access), always refer to the official CERN services or to your scientific host.

This article was written with the help of artificial intelligence. The information it contains is provided for guidance only and should be verified or cross-checked with official websites before any decision (town halls, Pays de Gex Tourist Office, organisations mentioned). To report any inaccuracy, please email us at contact@hebergeneve.com.