My second mission at Orange PFS began in March 2024 and I'm still working there. I went there right after my previous project at EDF.
We, with my team, are operating an infrastructure composed of Redhat Linux servers, and firewalls. For the most part, we are administrating these equipments, and making the infrastructure grow as needed. This infrastructure is in a production environment. We have to make sure everything worked as intented, as well as updating the applications and operating systems that were running on it frequently.
The main task I had there was always making sure everything was working correctly. This included keeping an eye on the monitoring system, checking every morning that everything was working as intended. I also had to be careful of e-mail alerts, and we had an automated ticketing system where incidents were reported when something went wrong.
I also had to be proactive. If there was anything that I thought could lead to a failure, I had to try and fix it before it made an impact on the system. This was also our whole team job.
From time to time, we had to update the system and applications. As everything was in production, we had to plan everything accordingly. This included reading documentation carefully to make sure there is no error, make sure there is a rollback procedure, and installing during the night so there would be minimal user impact.
For a system as critical as this one, we also had on-call duty, where we could be called 24/7 if there was an incident. We then had limited time to resolve it before it escalated.
Teamwork, as always was very important because of the critical aspect of the infrastructure. Good communication was essential, and we always have to make sure the team is aware of everything happening on the infrastructure.
This project helped me reinforce my skills running a production environment where every move counts and mistakes are not allowed.