Detection Engineer – EASM / ASM / Cyber Threat Intelligence (CTI)

ASTEK SINGAPORE INNOVATION TECHNOLOGY PTE. LTD.; Singapore; On-site; SGD 90,000 - 150,000; Full time

Job summary

Astek Singapore Innovation Technology Pte. Ltd. is seeking a Detection Engineer to build and operate the Security Exposure and Third-Party Cyber Assurance Centre of Excellence under CASD—External Threat Operations.

You will handle continuous monitoring, third-party assessments, and threat validation across internal and external surfaces. Responsibilities include ASM/EASM, CTI use, and automation; you will develop dashboards and postures, coordinate remediation, and communicate findings to

Qualifications

• Degree in Computer Science, Information Technology, or related field.
• Hands-on cybersecurity experience (3–5 years) in ops, exposure management, or third-party risk.

Responsibilities

• Operate and maintain always-on security exposure and external threat monitoring platforms.
• Monitor org, portfolio companies and third parties for internet-facing vulnerabilities and emerging threats.
• Perform ASM/EASM activities to identify, assess, and prioritize external exposures.
• Conduct third-party/vendor cybersecurity assessments including security questionnaires (VDD/ODD/SIG).
• Assess third-party security controls against NIST, ISO 27001, CIS Controls.
• Leverage CTI, digital risk, and dark-web monitoring to identify threats.
• Develop scripts in Python/PowerShell/Bash to automate monitoring and reporting.
• Build dashboards and metrics using data lake platforms.
• Document findings and remediation actions for technical and business stakeholders.
• Support continuous improvement of detection logic and monitoring processes.

Skills

Cybersecurity experience

Scripting

Stakeholder comms

Education

Bachelor in CS/IT

Tools

ASM/EASM

CTI platforms

Data lakes

Job description

Detection Engineer – Security Exposure & Third-Party Cyber Assurance

Role Overview

We are looking for a Detection Engineer to support the build-out and operations of the Security Exposure and Third-Party Cyber Assurance Centre of Excellence, under Cybersecurity Assurance and Defense (CASD) – External Threat Operations.

The role will provide hands-on technical and operational support across two key areas:

• Security Exposure Management (SEM): Continuous, outside-in monitoring of the organisation and its portfolio companies’ internet-facing attack surface.
• Third-Party Cyber Assurance (TPCA): Cybersecurity due diligence and continuous assurance across third parties and the broader supply chain.

The successful candidate will operate continuous monitoring platforms, conduct third-party cyber assessments, validate active and emerging threats, and coordinate remediation to reduce the time between exposure identification and potential exploitation.

Key Responsibilities

• Operate and maintain always-on security exposure and external threat monitoring platforms.
• Monitor the organisation, portfolio companies, and third parties for internet-facing vulnerabilities, exposures, and emerging cyber threats.
• Perform Attack Surface Management (ASM/EASM) activities to identify, assess, validate, and prioritise external security exposures.
• Conduct third-party/vendor cybersecurity assessments, including security questionnaires and due diligence activities such as VDD, ODD, and SIG.
• Assess third-party security controls against established frameworks including NIST, ISO 27001, and CIS Controls.
• Leverage Cyber Threat Intelligence (CTI), digital risk, and dark-web monitoring to identify and validate relevant threats.
• Investigate and validate high-risk or imminent security threats and coordinate appropriate remediation with relevant stakeholders.
• Analyse third- and fourth-party cyber risks and their potential impact across the organisation and supply chain.
• Develop scripts and automation using Python, PowerShell, or Bash to streamline monitoring, analysis, reporting, and operational activities.
• Build and maintain operational dashboards, reporting capabilities, and cyber posture metrics using data lake platforms.
• Document findings, processes, assessments, and remediation actions clearly for both technical and business stakeholders.
• Support continuous improvement of detection logic, control baselines, monitoring processes, and exposure management capabilities.

Requirements

• Degree in Computer Science, Information Technology, or a related discipline.
• 3–5 years of hands-on cybersecurity experience, preferably within cybersecurity operations, attack surface/exposure management, third-party cyber risk assessment, or data lake environments.
• Practical experience conducting third-party/vendor security assessments and questionnaires, including VDD, ODD, and SIG.
• Good knowledge of cybersecurity frameworks such as NIST, ISO 27001, and CIS Controls.
• Hands-on experience with ASM/EASM, cyber exposure management, digital risk monitoring, dark-web monitoring, and/or Cyber Threat Intelligence (CTI) platforms.
• Strong scripting capabilities using Python, PowerShell, or Bash, particularly for automation and reporting.
• Strong understanding of TCP/IP, DNS, HTTP/S, and common security exposures across AWS, Azure, and GCP.
• Understanding of third- and fourth-party cyber risk and how security exposure can propagate through the supply chain.
• Strong analytical and documentation skills, with the ability to handle sensitive security findings appropriately.
• Good communication and stakeholder management skills across technical and business teams.
• Collaborative, adaptable, and comfortable working in a fast-evolving cybersecurity environment.

Good to Have

• Certifications such as Security+, CEH, GIAC (GSEC/GCIH), CompTIA CySA+, or equivalent.
• CISSP Associate or CISM candidature.
• Experience developing cyber posture scorecards and operational security dashboards.
• Familiarity with detection engineering, including tuning detection logic and refining security control baselines as capabilities mature.

SEM | TPCA | ASM/EASM | CTI | Third-Party Cyber Risk | VDD/ODD | SIG | NIST | ISO 27001 | CIS Controls | Digital Risk & Dark-Web Monitoring | Python | PowerShell | Bash | TCP/IP | DNS | HTTP/S | AWS | Azure | GCP | Data Lakes | Detection Engineering