Senior Wintel Security Engineer / Infrastructure Security Enginee

Hong Kong Unison Limited; Kuala Lumpur; On-site; MYR 90,000 - 120,000; Full time

Job summary

Hong Kong Unison Limited in Malaysia is seeking a Senior Wintel Security Engineer to strengthen enterprise Windows infrastructure and security. You will lead vulnerability remediation, hardening, and policy enforcement across the stack.

You will drive automation, incident response, and documentation while coordinating with security teams to meet CIS/NIST/PCI-DSS standards. Strong leadership and hands-on engineering are essential for this role.

Qualifications

• Experience securing Windows Server environments (2016/2019/2022) and Active Directory.
• Experience with vulnerability management and remediation using Nessus/Qualys.
• Automation experience with PowerShell; scripting in Python preferred.
• Experience configuring GPOs, Defender, firewall settings and network device hardening.
• Ability to monitor, respond to incidents, and maintain security documentation.

Responsibilities

• Lead vulnerability assessment and remediation across enterprise infrastructure.
• Harden Windows Servers using Microsoft security best practices.
• Configure and manage Group Policies (GPO).
• Implement Windows Defender and Firewall security configurations.
• Secure Cisco, Juniper, and Palo Alto network devices.
• Perform vulnerability remediation using Nessus and Qualys reports.
• Develop automation scripts using PowerShell.
• Monitor infrastructure using SIEM tools.
• Support incident response and security investigations.
• Perform patch management and system hardening.
• Ensure compliance with CIS, NIST, DISA STIG, PCI-DSS, and HIPAA standards.
• Mentor junior engineers and provide technical leadership.
• Prepare technical documentation and SOPs.

Skills

Leadership & mentoring

Vulnerability assessment

Incident response

Security best practices

Documentation

Tools

Nessus

Qualys

Windows Defender

Windows Firewall

SCCM

WSUS

CrowdStrike

Splunk

QRadar

Palo Alto

Job description

Senior Wintel Security Engineer / Infrastructure Security Engineer

Location: Malaysia

Experience: 8+ Years

Job Summary

We are seeking an experienced Senior Wintel Security Engineer to strengthen and secure enterprise Windows and network infrastructure. The ideal candidate will have extensive experience in Windows Server Administration, Active Directory, vulnerability remediation, PowerShell automation, and network security. The role involves leading remediation activities, implementing security best practices, and ensuring compliance with enterprise security standards.

Key Responsibilities

• Lead vulnerability assessment and remediation across enterprise infrastructure.
• Harden Windows Servers using Microsoft security best practices.
• Configure and manage Group Policies (GPO).
• Implement Windows Defender and Firewall security configurations.
• Secure Cisco, Juniper, and Palo Alto network devices.
• Perform vulnerability remediation using Nessus and Qualys reports.
• Develop automation scripts using PowerShell.
• Monitor infrastructure using SIEM tools.
• Support incident response and security investigations.
• Perform patch management and system hardening.
• Ensure compliance with CIS, NIST, DISA STIG, PCI-DSS, and HIPAA standards.
• Mentor junior engineers and provide technical leadership.
• Prepare technical documentation and standard operating procedures (SOPs).

Mandatory Technical Skills

Windows Infrastructure

• Windows Server 2016/2019/2022
• Active Directory
• Group Policy (GPO)
• Windows Defender
• Windows Firewall

Security

• Vulnerability Assessment
• Vulnerability Remediation
• Nessus
• Qualys
• Security Hardening

Networking

• TCP/IP
• VLAN
• VPN
• Routing
• Cisco
• Juniper
• Palo Alto

Automation

• PowerShell
• Python (preferred)

Monitoring

• SIEM
• Incident Response

Preferred Skills

• AWS
• Azure
• CrowdStrike
• McAfee
• Splunk
• QRadar
• SCCM
• WSUS
• Hybrid Cloud
• Secure Architecture Design