We are looking for a hands-on Senior System Engineer to lead and support 24×7 mission-critical systems in secure on-premises environments. The role requires strong technical expertise and operational leadership, with hands-on involvement in deployments, critical incidents, and emergency recovery activities.

Mandatory Skill(s)

• Must have 5 years of experience in Systems Administration, Infrastructure Support, or Mission-Critical environments;
• Hands-on experience with Windows Server, Active Directory, GPO, and Microsoft SQL Server;
• Experience with VMware, Layer 2/3 networking, and Splunk monitoring;
• Knowledge of backup/recovery, disaster recovery, patching, and cybersecurity solutions;
• Experience supporting 24×7 on-premises systems;
• Strong troubleshooting, problem-solving, and analytical skills;
• Willing to provide on-site support for critical incidents and emergency recovery, including after-hours, weekends, and public holidays. 

Desirable Skill(s)

• Experience in air-gapped, secure, or regulated environments is preferred.

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 and manage VMware virtualization infrastructure including ESXi, vCenter, vSAN, and NSX;
• Monitor and manage system logs using Splunk and Syslog tools;
• Troubleshoot system issues and coordinate with OEM vendors for root cause analysis and resolution;
• 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;
• Provide 24/7 Level 2 operational support based on a scheduled rotation.

If you are interested in this role, click on the “Apply to this job” button below or you could also write in with your CV to Aarthy Sezhian at aarthy.s@sciente.com quoting the job title.