Network Security Engineer (SASE and Secure Web Gateway)

Optimum Solutions (Singapore) Pte Ltd.; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

Optimum Solutions (Singapore) Pte Ltd. seeks a hands-on Senior Network Security Engineer to architect and evolve cloud-delivered security for a leading banking environment. You will drive SWG, SASE, and ZTNA transformations, ensuring robust, secure network connectivity.

You will lead policy design, vendor evaluations, and automation efforts while aligning with regulatory audits and runbooks to maintain secure operations.

Qualifications

• Degree in Computer Science, Information Technology, or related field.
• 8–12 years in network or security engineering.
• 4+ years on enterprise SSE/SASE platforms (e.g., Zscaler, Netskope, Prisma Access).
• Migration experience from on‑prem proxies to cloud SWG essential.
• Experience delivering ZTNA solutions to replace remote VPNs.
• Understanding of HTTP/S, TLS, PKI, DNS, and auth flows (SAML, Kerberos).
• Experience with IdPs (Microsoft Entra ID or Okta) via SAML/SCIM; firewalls knowledge.

Responsibilities

• Lead architecture, engineering, and evolution of a cloud-delivered security edge.
• Design and migrate SWG, ZTNA, and SASE for secure networks.
• Automate configuration management via APIs under version control.
• Support regulatory audits and produce engineering runbooks (e.g., MAS TRM).

Skills

Network security

SSE/SASE design

ZTNA design

Cloud security

Identity integration

Education

Bachelor's degree in Computer Science or related field

Tools

Zscaler

Netskope

Prisma Access

Cisco Secure Access

Palo Alto

Check Point

Job description

About the Role

We are seeking a hands‑on and analytical Senior Network Security Engineer to lead the architecture, engineering, and evolution of a cloud-delivered security edge for a leading banking environment. In this role, you will spearhead Secure Web Gateway (SWG), Secure Access Service Edge (SASE), and Zero Trust Network Access (ZTNA) transformations, ensuring robust, secure, and seamless network connectivity.

Responsibilities

• Secure Web Gateway (SWG): Design and maintain web security policy architecture (URL filtering, cloud application control, cloud firewall, file‑type/sandbox policies). Engineer SSL/TLS inspection strategies, exemption frameworks, and traffic steering via PAC files, explicit proxies, and GRE/IPsec tunnels. Lead the migration of legacy on‑premises proxies to Cloud SWG.
• Zero Trust & SASE: Design and build Zero Trust Network Access (ZTNA) to replace remote‑access VPNs. Engineer identity integration with corporate IdPs (SAML, SCIM) and implement CASB, DLP, and data‑protection controls for cloud and web traffic.
• Platform Operations & Automation: Maintain platform‑independent security policy baselines, perform technical vendor evaluations, and automate configuration management via APIs under version control.
• Governance & Compliance: Deliver engineering runbooks for Change Advisory Board reviews and support rigorous regulatory audits (e.g., MAS TRM guidelines).

Requirements

• Degree in Computer Science, Information Technology, or a related field.
• 8 to 12 years of total experience in network or security engineering, with at least 4 years dedicated to designing and implementing enterprise SSE/SASE platforms (e.g., Zscaler, Netskope, Prisma Access, Cisco Secure Access) — hands‑on engineering focus, not end‑user support.
• Demonstrated success leading at least one complete migration from an on‑premises proxy (e.g., Bluecoat/Symantec ProxySG, Cisco WSA, McAfee SWG) to a cloud SWG platform.
• Proven experience designing and delivering ZTNA solutions to replace legacy remote‑access VPNs.
• Deep understanding of HTTP/S, TLS and PKI, proxy/PAC file behaviour, DNS, and authentication workflows (SAML, Kerberos).
• Experience integrating identity providers (Microsoft Entra ID or Okta via SAML/SCIM) and working knowledge of enterprise firewalls (Palo Alto, Check Point) alongside GRE/IPsec tunnelling.
• Experience operating under the ITIL framework in a regulated environment; strong problem‑solving skills and a collaborative, fast‑learning mindset.

Good-to-Have Skills

• Hands‑on design and implementation experience with Zscaler (ZIA/ZPA), Netskope, or Skyhigh Security SSE.
• Experience driving platform evaluations, proofs‑of‑concept (PoC), or platform‑to‑platform migrations.
• Expertise in digital experience monitoring, advanced DLP (EDM/IDM), and browser isolation.
• ing and automation skills using Python or Terraform for SASE configurations, plus SIEM integration (Splunk).
• Endpoint management experience for agent deployments (Intune, SCCM, Jamf).
• Prior work experience within the Financial Services sector.
• Professional certifications such as CISSP, CCSP, vendor‑specific credentials (e.g., Netskope NCCSI/NSK200/300, Palo Alto Networks SSE Engineer, Zscaler ZDTA/ZDTE).