Your role
As a true technical expert, you ensure the proper functioning, security, and evolution of our system and network infrastructures. You will be involved both in daily operations and strategic projects aimed at modernising our IT environment.

Your expertise will directly contribute to guaranteeing the availability of IT services used daily by our staff.

What you will do daily
Maintain and develop our system infrastructure
· Deploy and maintain Windows and Linux VM servers
· Ensure the operational maintenance of our VMware platforms
· Manage the lifecycle of operating systems and lead necessary migrations
· Participate in the continuous improvement of our server and storage infrastructures
· Administer infrastructure services
· Maintain and develop Active Directory, DNS, and DHCP
· Manage access rights and contribute to identity governance
· Ensure the coherence and reliability of the company’s fundamental services
· Develop and modernise our networks
· Design and deploy network infrastructures for our various sites
· Deploy and evolve the access network (on-site switches and routers, L2, L3, VoIP, DHCP)
· Diagnose and resolve complex network-related incidents.

Strengthen cybersecurity
· Develop security measures (EDR, antivirus, antispam, IAM, 802.1X)
· Participate in defining and applying security best practices
· Analyse alerts and contribute to the continuous improvement of our security posture

Supervise and document
· Develop infrastructure monitoring using Zabbix.
· Create relevant dashboards and tracking indicators
· Maintain clear and up-to-date technical documentation
· Participate in projects and expert support
· Contribute to system, network, and backup architecture evolution projects
· Provide level 3 support to the IT team
· Collaborate with our partners and suppliers to ensure service quality

Profile sought

Education
· Bachelor’s degree in computer science or equivalent training.

Experience
· Minimum 5 years of experience in system and network administration.

Your technical skills
· You are comfortable with several of the following technologies:
· Windows Server and Linux
· Active Directory, DNS, DHCP
· VMware and ESXi
· NetApp
· IP networks, VLAN, routing, and firewall
· Cybersecurity: EDR, IAM, 802.1X
· Monitoring with Zabbix

Your personal qualities
· Curiosity and a continuous desire to learn
· Analytical mind and ability to solve complex problems
· Organisational skills and autonomy
· Team spirit and collaboration
· Service orientation and user satisfaction
· Ability to take a step back and contribute to a global vision of the infrastructure

Why join the 3R Group? A meaningful environment
You join a committed group whose activities have a concrete impact on the quality of services delivered.

Exciting projects
Virtualisation, cybersecurity, infrastructure modernisation, network evolution, monitoring: you will participate in varied and high-value projects.

A human-sized team
You will work in a collaborative environment where ideas are heard and everyone can contribute to technical decisions.

A key role
You are a key player in the stability, security, and evolution of our information system.

Interested?
We look forward to discovering your background and discussing the technological challenges ahead.

Position based in French-speaking Switzerland

Join the 3R Group and help build the IT of tomorrow.