IT System Administrator

About the role

The Senior IT System Administrator is responsible for the stability, security, and day-to-day operation of the bank's IT infrastructure across cloud, on-premises, and hybrid environments. This role combines deep technical expertise with hands-on operational work, including routine system administration tasks, while independently handling complex issues and supporting infrastructure improvements.

Duties & Responsibilities

• Perform hands-on administration of Windows and Linux servers in cloud and hybrid environments.
• Deploy, configure, and maintain cloud resources (compute, storage, networking).
• Maintain monitoring systems, networks, and cloud platforms to ensure availability and performance.
• Troubleshoot and resolve infrastructure, network, and security incidents, including routine operational issues.
• Implement and maintain security controls (MFA, firewalls, endpoint protection, patching).
• Administer identity and access management (Active Directory, IAM, GPOs, DNS, DHCP).
• Manage backups, replication, and disaster recovery tasks, including regular validation.
• Support LAN/WAN, VPNs, and hybrid cloud connectivity.
• Apply system updates, patches, and configuration changes following established procedures.
• Automate operational and maintenance tasks using scripting (PowerShell, Bash).
• Document configurations, procedures, and operational changes.
• Participate in infrastructure and security projects.
• Stay current with cybersecurity threats and infrastructure best practices.
• On-call rotation for critical infrastructure support.
• Occasional after-hours or weekend work for maintenance or incidents.

Qualifications

• Bachelor’s degree in IT, Computer Science, or equivalent practical experience.
• 5+ years of experience in system administration or IT infrastructure roles.
• Strong hands-on experience with: Windows and Linux server administration, Virtualization (VMware / Hyper-V), Networking fundamentals.
• Experience with Azure, Microsoft 365, and/or AWS.
• Solid understanding of security principles and IT compliance frameworks (ISO, HIPAA, GDPR – preferred).
• Comfortable performing both routine operational tasks and advanced troubleshooting independently.
• English required; Portuguese and/or Spanish preferred.
• Experience performing similar duties in similar highly regulated industries is preferred.

Certifications (Preferred)

• Azure Administrator (AZ-104)
• AWS Certification
• CompTIA Security+ and/or Network+
• CCNA or ITIL Foundation