Senior Systems and Network Engineer

Ren Ci Hospital; Singapore; On-site; SGD 90,000 - 140,000; Full time

Job summary

Ren Ci Hospital in Singapore is seeking a seasoned IT Infrastructure Administrator to oversee servers, networking, and security, including cloud services, to ensure performance and reliability in a healthcare setting. You will design, implement, and maintain IT infrastructure, manage AD, DNS, DHCP, backups, and DR, while on rotating standby rosters to provide after-hours support.

You will work with Nutanix, Veeam, SolarWinds, CyberArk, Nessus, Entra, and cloud platforms to meet regulatory needs

Qualifications

• Bachelor’s degree in information technology or related field.
• 5+ years of experience providing systems, network and cybersecurity operational support.
• Hands-on experience with servers, network and security devices, firewall, switches, routers, load balancers and wireless solutions.
• Experience with Nutanix HCI, NAS, backup, SQL backup, SolarWinds, PAM tools (CyberArk), Nessus/OpenVAS, Microsoft Entra, and cloud platforms.

Responsibilities

• Oversee the organization’s IT infrastructure, ensuring performance, security, and reliability of servers, network and security systems, and cloud services.
• Design, implement, and maintain IT infrastructure for a healthcare organization.
• Maintain Windows servers, virtualization platforms, and storage solutions; manage AD, DNS, DHCP, and Group Policy; ensure high availability and DR with backups.

Skills

Windows Server

Networking

Security

Active Directory

Cloud (Azure/AWS/GCP)

Nutanix

Veeam/Backup

PAM/CyberArk

Education

Bachelor's degree in information technology or related field

Tools

Nutanix HCI

Synology NAS

Veeam

Redgate SQL backup

SolarWinds

CyberArk

Nessus/OpenVAS

Microsoft Entra

Azure/AWS/GCP

Job description

Location: Novena

Job Category: Administration

Posting Date: 3 Sept 2026

Job Responsibilities

You will oversee the organization’s IT infrastructure, ensuring optimal performance, security, and reliability of servers, network and security systems, as well as cloud services. You will also have to design, implement, and maintain the IT infrastructure of a healthcare organization.

Perform Systems Administration

• Maintain Windows servers, virtualization platforms, and storage solutions.
• Manage Active Directory, DNS, DHCP, and Group Policy. Ensure high availability and disaster recovery with backups and replication.
• Monitor system performance, troubleshoot issues, and apply patches and updates.

Maintain Network Services

• Implement network design, configure, and maintain LAN, WLAN, and VPN infrastructure, managing firewalls, switches, and routers.
• Implement and monitor network security policies, intrusion detection, and access control.
• Optimize network performance, troubleshoot connectivity issues, and ensure redundancy.

Ensure Security and Compliance

• Implement cybersecurity best practices, monitor threats, and manage endpoint protection and vulnerability assessments.
• Ensure compliance with regulations (e.g., HIB).
• Conduct security audits and enforce policies on user access, encryption, and authentication.

Documentation and Reporting

• Create and maintain network documentation, including network diagrams, configurations, and procedures.

On Rotating Roster

• Provide standby support during off-office hours and weekend on a rotational basis.

Ad-Hoc Assignments

• Carry out any other tasks assigned by the supervisor or RO.

Job Requirements

• Bachelor’s degree in information technology or related field.
• With networking, system and security certifications such as CCNA, CCNP, CCIE, Microsoft certified Azure Solutions Architect and/or Windows Server Administrator, CISSP, CISM and CompTIA Security.
• At least 5 years of experience providing systems, network and cybersecurity operational support.
• Must have hands‑on experience with servers, network and security devices, firewall, switches, routers, load balancers and wireless solutions.
• Within experience in at least 5 of the below technologies:
  • Windows Server environments, including installation, configuration, maintenance, and troubleshooting.
  • Managing and maintaining Active Directory, including user and group management, Group Policy, and domain services.
  • Nutanix Hyper‑Converged Infrastructure (HCI) or equivalent technologies, including deployment, configuration, and management of Nutanix clusters.
  • NAS systems such as Synology, including RAID configurations, storage pools, volume management, and monitoring storage health.
  • Deploying, configuring, and managing Backup & Replication solutions such as Veeam. Experience with backup strategies, disaster recovery, and data restoration.
  • SQL Server backups technologies such as Redgate, including configuring backup schedules, performing restores, and ensuring data integrity.
  • Network monitoring tools such as SolarWinds, including setting up and managing network and server monitoring, creating alerts, and troubleshooting performance issues.
  • Managing privileged accounts, including password rotation, session management, and auditing using PAM tools such as Password State and CyberArk.
  • Vulnerability scanning and assessment technologies such as Nessus and OpenVAS, including configuring scans, analysing results, and implementing remediation plans.
  • Microsoft Entra for identity and access management, including integration with Azure AD, managing user identities, and ensuring secure access to resources.
  • Cloud platforms such as Azure, AWS and/or GCP.