Associate Consultant, Security Testing and Red Teaming

Ensign InfoSecurity (Singapore) Pte. Ltd.; Singapore; On-site; SGD 60,000 - 100,000; Full time

Job summary

Ensign InfoSecurity (Singapore) Pte. Ltd. is seeking a penetration tester to execute engagements across web, network, cloud, mobile, IoT and OT environments.

You will work under senior consultants, following defined scopes and methodologies to identify and exploit vulnerabilities. The role requires OSCP certification, solid knowledge of security fundamentals, and hands-on experience with Burp Suite, Nmap, Metasploit, and BloodHound.

Qualifications

• OSCP certification is required.
• Strong understanding of penetration testing methodologies and ethical hacking.
• Foundations in TCP/IP, Windows and Linux.
• Experience with web app security and vulnerability discovery.
• Scripting or programming exposure (Python, Bash, PowerShell).
• Familiarity with OWASP Top 10 and common misconfigurations.

Responsibilities

• Conduct penetration testing engagements under guidance of senior consultants.
• Execute testing activities within defined scopes and methodologies.
• Identify, validate, and exploit security vulnerabilities.
• Document findings with technical details and remediation recommendations.
• Prepare technical reports and executive summaries.
• Collaborate with team during testing, including peer reviews.
• Maintain testing notes and artifacts for QA and reporting.
• Stay current with vulnerabilities and offensive security tooling.
• Support broader offensive security activities over time.

Skills

OSCP certification

Penetration testing

TCP/IP

Windows & Linux

Web security

Scripting (Python/Bash/PowerShell)

OWASP Top 10

Security tools (Burp/Nmap/Metasploit/B

Documentation

Red team interest

Tools

Burp Suite

Nmap

Metasploit

BloodHound

Job description

Ensign is hiring !

Roles and Responsibilities

• Conduct penetration testing engagements under the guidance of senior consultants, including:
  • Web application penetration testing
  • Network and infrastructure penetration testing (internal and external)
  • Cloud security testing (e.g. AWS, Azure, GCP)
  • Mobile application penetration testing
  • IOT penetration testing
  • OT penetration testing
• Execute assigned testing activities responsibly and professionally, following defined scopes, rules of engagement, and methodologies.
• Identify, validate, and exploit security vulnerabilities using industry-standard tools and manual techniques.
• Document findings clearly and accurately, including technical details, evidence, and remediation recommendations.
• Assist in preparing high-quality technical reports and contribute to executive-level summaries.
• Participate in engagement activities such as kick-off calls, scoping discussions, and post-engagement briefings where appropriate.
• Collaborate with team members during testing, including peer reviews and technical walkthroughs.
• Maintain detailed testing notes, logs, and artifacts to support quality assurance and reporting.
• Continuously develop technical skills across penetration testing, exploitation techniques, and security fundamentals.
• Stay current with emerging vulnerabilities, attack techniques, and offensive security tooling.
• Over time, support or participate in broader offensive security activities, such as:
  • Adversary simulation and red teaming exercises
  • Automation or tooling development
  • Security research and proof-of-concept development

Requirements

• Offensive Security Certified Professional (OSCP) certification is required.
• Strong understanding of penetration testing methodologies and ethical hacking principles.
• Solid foundations in:
  • TCP/IP networking
  • Operating systems (Windows and Linux)
  • Web application architecture and common vulnerabilities
• Exposure to scripting or programming (e.g. Python, Bash, PowerShell).
• Familiarity with common vulnerability classes (e.g. OWASP Top 10, misconfigurations, credential abuse).
• Basic understanding of Active Directory security concepts.
• Exposure to cloud platforms or containerised environments will be useful.
• Hands-on experience using common penetration testing tools (e.g. Burp Suite, Nmap, Metasploit, BloodHound).
• Ability to write clear, structured, and technically accurate documentation and reports.
• Strong desire to grow into advanced offensive security and red teaming roles.
• Strong analytical mindset and problem-solving skills.
• Professional conduct, integrity, and respect for confidentiality.