Network Security Engineer (F5)

OPENSOURCE PTE. LTD.; Singapore; On-site; SGD 100,000 - 125,000; Full time

Job summary

A leading technology firm in Singapore is seeking an experienced Security Engineer with over 3 years of hands-on experience in F5 and firewall solutions as well as Azure cloud security knowledge. The candidate will implement and manage security implementations and collaborate with teams to enforce security policies. Relevant certifications and understanding of security principles are crucial for this role.

Qualifications

• 3–5 years of hands-on experience in network security or engineering roles.
• Proven experience with F5 BIG-IP platforms.
• Experience with Azure cloud security required.

Responsibilities

• Deploy and maintain F5 systems with experience in LTM, WAF, API.
• Deploy and maintain Azure Cloud security solutions.
• Implement and maintain firewall management solutions.

Skills

F5 BIG-IP platforms experience

Azure cloud security experience

Network protocol understanding

Firewall solutions knowledge

Security principles knowledge

Automation familiarity

Education

Preferred Certifications: Microsoft Certified: Azure Security Engineer Associate

Preferred Certifications: Cisco Certified Network Professional (CCNP Security)

Preferred Certifications: F5 Certified Administrator

Preferred Certifications: CISSP or CompTIA Security+

Job description

Role Overview

We are seeking a Security Engineer with 3+ years of hands‑on experience in implementing and managing F5 and firewall solutions, with a strong understanding of the Azure cloud platform and security principles.

Key Responsibilities

• Security Implementation & Management
  • Deploy and maintain F5 systems with experience in LTM, WAF, API
  • Deploy and maintain Azure Cloud security, with experience in APIM gateways.
  • Implement and maintain firewall management and security solutions.
• Security Policy & Configuration
  • Implement and enforce granular security policies on F5, firewall solutions, and Azure APIM gateways
  • Perform regular policy rule base reviews, cleanups, and optimizations to maintain a strong security posture and network performance.
  • Integrate and configure F5, firewall, and security solutions to enforce application delivery and security policies.
• Documentation & Collaboration
  • Prepare and maintain diagrams, configurations, and standard operating procedures.
  • Collaborate with cross-functional teams to ensure security policies align with business objectives.

Qualifications

• Experience: 3–5 years of hands‑on experience in network security or engineering roles.
• Technical Skills:
  • Hands‑on experience with F5 BIG‑IP platforms (LTM, WAF/ASM, API).
  • Proven experience with Azure cloud security (NSG, APIM).
  • Implementation knowledge of network firewall solutions (FTD, FMC).
  • Strong understanding of network protocols (TCP/IP, DNS, HTTP/S).
  • Knowledge of security principles (firewalls, IDS/IPS, VPNs).
  • Familiarity with automation and cloud security is a plus.
• Preferred Certifications
  • Microsoft Certified: Azure Security Engineer Associate
  • Cisco Certified Network Professional (CCNP Security)
  • F5 Certified Administrator or F5 Certified Technology Specialist (CTS)
  • Other relevant security certifications (CISSP, CompTIA Security+)