Senior Siem Operations Engineer

Senior Siem Operations Engineer
Porto
Oliveira do Douro, Porto, Portugal

Just Vargas is a human resources consultancy that recruits, trains, and supports talent, helping both companies and professionals reach their full potential.

We are recruiting for a leading company in the financial sector. We are looking for a Senior SIEM Operations Engineer who will ensure the stability, performance, and continuous improvement of the organizations SIEM environment and its supporting infrastructure. This person will play a critical role in maintaining security visibility across the organization by managing log sources, optimizing system performance, and supporting incident response capabilities.

Key Responsibilities

- Operate and maintain the
- premises SIEM platform, including system updates, configuration changes, and coordination of hardware services (remote only);



- Perform regular patching and vulnerability mitigation for SIEM infrastructure and auxiliary systems;



- Monitor and maintain backup systems and update detection rules to ensure operational continuity;



- Support and maintain auxiliary systems such as Git servers, rsyslog servers, and other Linux-based services;



- Participate in
- call rotations to ensure 24/7 operational support;



- Manage approximately 23, 000 log sources, ensuring they are active, correctly transmitting data, and properly parsed within the SIEM;



- Add new log sources and decommission inactive ones to maintain data accuracy and consistency;



- Verify data parsing and normalization across all sources;



- Perform capacityplanning and lifecycle management of all SIEM components;



- Analyse, optimize, and develop scripts in Python or Bash to automate and enhance daily operations;



- Maintain and improve logging protocol standards by defining what should be logged, testing, and implementing updated standards across the environment;



- Coordinate dailyoperational activities within the SIEM team to ensure smooth execution of tasks and alignment with service expectations;



- Act as a technicalescalation point and mentor for junior and
- level engineers, ensuring effective knowledge