Penetration Tester

SCIENTE; Singapore; On-site; SGD 67,000 - 134,000; Full time

Job summary

SCIENTE seeks a Penetration Tester to identify and exploit vulnerabilities across networks, applications, and cloud environments using ethical hacking techniques. The role strengthens security posture by delivering actionable insights and detailed risk assessments.

The successful candidate will conduct penetration testing across web apps, APIs, and infrastructure, perform vulnerability assessments, and deliver detailed reports with remediation recommendations for stakeholders.

Qualifications

• Must have 3+ years of hands-on penetration testing experience.
• Strong experience in web application and API penetration testing.
• Good understanding of network security, TCP/IP, HTTP/HTTPS, DNS and common network protocols.
• Strong knowledge of OWASP Top 10 and common web vulnerabilities.
• Hands-on experience with Linux and Windows environments.
• Knowledge of Active Directory, privilege escalation and lateral movement.
• Scripting/programming experience in Python, PowerShell or Bash.
• Familiar with penetration-testing tools such as Burp Suite, Nmap, Metasploit and Kali Linux, Wireshark, BloodHound, Impacket and Nessus.
• Strong analytical, problem-solving and report-writing skills.

Responsibilities

• Conduct penetration testing across web applications, APIs, networks, infrastructure and cloud environments.
• Perform vulnerability assessment and validate vulnerabilities through controlled exploitation.
• Identify security weaknesses including OWASP Top 10, authentication/authorization flaws, injection vulnerabilities, misconfigurations and privilege escalation.
• Conduct internal/external network penetration testing and assess network security controls.
• Perform Active Directory security assessments, including privilege escalation, credential attacks and lateral movement.
• Conduct security testing of REST APIs, mobile applications and cloud environments where applicable.
• Develop or customise scripts, payloads and tools to support penetration-testing activities.
• Analyse test results and determine the business impact and risk of identified vulnerabilities.
• Prepare detailed penetration-testing reports including technical findings, evidence, risk ratings and remediation recommendations.
• Work with security and technology teams to validate remediation and perform re-testing.
• Keep up to date with emerging vulnerabilities, exploitation techniques, attack methodologies and security trends.

Skills

Penetration testing

Web application security

API security testing

Network security

OWASP Top 10

Scripting: Python/PowerShell/Bash

Linux/Windows

Active Directory & privilege

Report writing

Analytical problem-solving

Education

Diploma/Degree in Cybersecurity

Tools

Burp Suite

Nmap

Metasploit

Kali Linux

Wireshark

BloodHound

Impacket

Nessus

Job description

Job Summary

Seeking a Penetration Tester to identify, analyze, and exploit security vulnerabilities across networks, applications, and cloud environments using ethical hacking techniques. Aiming to strengthen organizational security posture by delivering actionable insights and detailed risk assessments.

Mandatory Skill-set

• Diploma/Degree in Cybersecurity, Computer Science, Information Technology;
• Must have 3+ years of hands-on penetration testing experience;
• Strong experience in web application and API penetration testing;
• Good understanding of network security, TCP/IP, HTTP/HTTPS, DNS and common network protocols;
• Strong knowledge of OWASP Top 10 and common web vulnerabilities;
• Hands-on experience with Linux and Windows environments;
• Knowledge of Active Directory, privilege escalation and lateral movement;
• Scripting/programming experience in Python, PowerShell or Bash;
• Familiar with penetration-testing tools such as Burp Suite, Nmap, Metasploit and Kali Linux,Wireshark, BloodHound, Impacket and Nessus;
• Strong analytical, problem-solving and report-writing skills.

Desired Skill-set

• Experience with AWS, Azure or GCP penetration testing;
• Certifications such as OSCP, OSWE, OSEP, CREST, GPEN or CEH.

Responsibilities

• Conduct penetration testing across web applications, APIs, networks, infrastructure and cloud environments;
• Perform vulnerability assessment and validate vulnerabilities through controlled exploitation;
• Identify security weaknesses including OWASP Top 10, authentication/authorization flaws, injection vulnerabilities, misconfigurations and privilege escalation;
• Conduct internal/external network penetration testing and assess network security controls;
• Perform Active Directory security assessments, including privilege escalation, credential attacks and lateral movement;
• Conduct security testing of REST APIs, mobile applications and cloud environments where applicable;
• Develop or customise scripts, payloads and tools to support penetration-testing activities;
• Analyse test results and determine the business impact and risk of identified vulnerabilities;
• Prepare detailed penetration-testing reports including technical findings, evidence, risk ratings and remediation recommendations;
• Work with security and technology teams to validate remediation and perform re-testing;
• Keep up to date with emerging vulnerabilities, exploitation techniques, attack methodologies and security trends.

Confidentiality is assured, and only shortlisted candidates will be notified for interviews.

EA Licence No. 07C5639