IT System Administrator

Tasks and responsibilities

The role of Senior IT System Administrator involves ensuring the stability, security, and day-to-day operation of the company’s IT infrastructure in cloud, on-premises, and hybrid environments. Responsibilities include:

• Hands-on administration of Windows and Linux servers in cloud and hybrid environments
• Provisioning, configuration, and maintenance of cloud resources (computing power, storage, networking)
• Monitoring systems, networks, and cloud platforms to ensure availability and performance
• Handling and resolving infrastructure, network, and security incidents, including routine operational issues
• Implementation and maintenance of security controls (MFA, firewalls, endpoint protection, patching)
• Identity and Access Management (Active Directory, IAM, GPOs, DNS, DHCP)
• Management of backup, replication, and disaster recovery tasks, including regular validation
• Support for LAN/WAN, VPNs, and hybrid cloud connections
• Applying system updates, patches, and configuration changes in accordance with established procedures
• Automation of operational and maintenance tasks using scripts (PowerShell, Bash)
• Documentation of configurations, procedures, and operational changes
• Participation in infrastructure and security projects
• Staying informed about cybersecurity threats and infrastructure best practices
• On-call rotation for critical infrastructure support
• Occasional night shifts or weekend work for maintenance or incident response

Requirements

The following requirements are necessary:

• Degree in IT, computer science, or equivalent practical experience
• 5+ years of experience in system administration or IT infrastructure roles
• Extensive hands-on experience with:
  • Windows and Linux Server Administration
  • Virtualization (VMware / Hyper-V)
  • Network Fundamentals
• Experience with Azure, Microsoft 365, and/or AWS
• Solid understanding of security principles and IT compliance frameworks (ISO, HIPAA, GDPR – preferred)
• Confidence when performing routine operations and advanced troubleshooting independently
• English required; Portuguese and/or Spanish preferred
• Experience performing similar tasks in similar highly regulated industries is preferred

Certifications (Preferred)

The following certifications are preferred:

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

We offer

No information available.