Senior Systems and Network Engineer

RENCI; Singapore; On-site; SGD 90,000 - 130,000; Full time

Job summary

RENCI is seeking an experienced IT Infrastructure Specialist in Singapore to oversee and optimize the organization’s servers, networks, and cloud services. You will design, implement, and maintain secure, compliant infrastructure for a healthcare environment.

Responsibilities include systems and network administration, disaster recovery, security monitoring, and documentation. A rotating standby schedule and ad-hoc tasks are part of the role.

Qualifications

• Bachelor’s degree in information technology or related field.
• Professional certifications such as CCNA/CCNP/CCIE, Azure Architect, CISSP, CISM and/or CompTIA Security+.
• 5+ years of experience providing systems, network and cybersecurity operational support.
• Hands-on experience with servers, network and security devices, firewalls, switches, routers, load balancers and wireless solutions.
• Experience with at least 5 of listed technologies in the ad.

Responsibilities

• Oversee IT infrastructure ensuring performance, security and reliability of servers, network, security systems and cloud services.
• Design, implement and maintain IT infrastructure for a healthcare organization.
• Perform systems administration: Windows servers, virtualization, storage, AD/DNS/DHCP/GP, backups and DR.
• Maintain network services: LAN/WLAN/VPN, firewalls, switches, routers; implement security policies.
• Ensure security and compliance: endpoint protection, audits, access controls and encryption.
• Documentation and reporting: network diagrams and procedures.
• On rotating roster: standby support during off-office hours and weekends.
• Ad-hoc assignments as directed by supervisor or RO.

Skills

IT infrastructure

Systems administration

Network operations

Security & compliance

Disaster recovery

Education

Bachelor’s degree in information technology or related field

CCNA

CCNP

CCIE

Microsoft Azure Solutions Architect

CISSP

CISM

CompTIA Security+

Tools

Nutanix HCI

Veeam

Redgate SQL backups

SolarWinds

CyberArk PAM

Password State

Nessus/OpenVAS

Microsoft Entra / Azure AD

Azure/AWS/GCP

Job description

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.

• 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.