Senior IT & OT Security Architect

Horizon Technology Recruitment; Hong Kong; On-site; HKD 900,000 - 1,400,000; Full time

Job summary

Horizon Technology Recruitment is seeking a senior security architect specialising in operational technology and enterprise security. The role is hands-on, bridging IT and OT security, and leading architecture reviews against standards and regulatory expectations.

You will own security baselines, guide end-to-end secure designs, and mentor a team of architects while coordinating across vendors and internal stakeholders in Hong Kong. Fluent English and Chinese are required.

Qualifications

• Degree-level education or equivalent.

Responsibilities

• Act as the recognised authority on securing operational technology, running architecture reviews against standards and internal security requirements.
• Provide hands-on direction across IT and OT security, including system hardening and secure design.
• Define security baseline requirements and update them as platforms/infrastructure expand.
• Guide end-to-end secure architectures, including hardening and configuring security controls.
• Contribute to internal security policies, standards and guidance.
• Embed architectural assurance into business case reviews, checking designs for posture across networks and infrastructure.
• Run technology evaluations with internal and external teams to select fit-for-purpose tooling.
• Steer and track delivery of security initiatives across the function.
• Support security operations with specialist input during IT and OT incidents.
• Mentor and upskill architects and security colleagues across IT/OT topics.
• Manage vendors across project delivery and ongoing support.

Skills

Operational technology security

Security architecture design

IT/OT convergence

Vendor management

Cyber risk management

NIST/ISO frameworks

CISSP

SABSA

GICSP

Leadership & mentoring

Bilingual (English/Chinese)

Education

Degree-level education or equivalent

Tools

GICSP

CISSP

SABSA

Job description

Horizon Technology Recruitment is seeking a senior security architect specialising in operational technology and enterprise security. The role is hands-on, bridging IT and OT security, and leading architecture reviews against standards and regulatory expectations.

You will own security baselines, guide end-to-end secure designs, and mentor a team of architects while coordinating across vendors and internal stakeholders in Hong Kong. Fluent English and Chinese are required.