System Engineer – 24x7 On-Premises Support

About the role

SCIENTE is looking for a hands-on System Engineer to lead and support 24x7 mission-critical systems in secure on-premises environments. The role calls for strong technical expertise and operational leadership, with direct involvement in deployments, critical incidents and emergency recovery. Candidates must be willing to provide on-site support for critical incidents, including after hours, weekends and public holidays.

Key responsibilities

• Administer and maintain Windows servers, workstations and Active Directory environments
• Manage antivirus definitions, security patches, OS, software and firmware upgrades
• Perform SSL certificate renewal and management across all system components
• Maintain VMware virtualization infrastructure (ESXi, vCenter, vSAN, NSX)
• Monitor and manage system logs with Splunk and Syslog
• Troubleshoot system issues and coordinate with OEM vendors for root cause analysis
• Perform monthly preventive maintenance, system health checks and reporting
• Support system deployment and change activities during off-peak hours
• Manage L1-L3 incident tickets and service requests, and provide 24/7 Level 2 operational support on a scheduled rotation

Required profile

• 2-5 years of experience in Systems Administration, Infrastructure Support or mission-critical environments
• Experience supporting 24x7 on-premises systems
• Strong troubleshooting, problem-solving and analytical skills
• Willingness to provide on-site support for critical incidents and emergency recovery
• Preferred: experience in air-gapped, secure or regulated environments

Required skills

• Windows Server, Active Directory, GPO and Microsoft SQL Server
• VMware, Layer 2/3 networking and Splunk monitoring
• Backup/recovery, disaster recovery, patching and cybersecurity knowledge