Penetration Tester (JD#11348)

Sciente International Pte Ltd; Singapore; On-site; SGD 90,000 - 140,000; Full time

Job summary

Sciente International Pte Ltd is seeking a Penetration Tester to identify, analyze, and exploit security vulnerabilities across networks, applications, and cloud environments using ethical hacking techniques. You will deliver actionable insights and risk assessments to strengthen our security posture.

The role requires hands-on testing experience, a solid grasp of OWASP Top 10, and proficiency with industry tools.

Qualifications

• 3+ years hands-on penetration testing experience.
• Strong web app and API testing experience.
• Solid understanding of network protocols (TCP/IP, HTTP/HTTPS, DNS).
• Knowledge of OWASP Top 10 and common vulnerabilities.
• Experience with Linux and Windows environments.
• Knowledge of Active Directory and privilege escalation.
• Scripting skills in Python, PowerShell or Bash.
• Experience with penetration testing tools such as Burp Suite, Nmap, Metasploit, Kali Linux, Wireshark, BloodHound, Impacket and Nessus.
• Strong analytical and report-writing skills.

Responsibilities

• Conduct penetration testing across web apps, APIs, networks, infrastructure and cloud environments.
• Perform vulnerability assessments and validate findings through controlled exploitation.
• Identify security weaknesses including OWASP Top 10, authentication/authorization flaws, injections and misconfigurations.
• Carry out internal/external network penetration testing and assess network controls.
• Perform Active Directory security assessments, including privilege escalation and lateral movement.
• Test REST APIs, mobile apps and cloud environments where applicable.
• Develop or customize scripts and tools to support testing.
• Analyze results and determine business impact and risk of vulnerabilities.
• Prepare detailed penetration-testing reports with evidence, risk ratings, and remediation recommendations.
• Collaborate with security teams to validate remediation and re-test.
• Keep up to date with vulnerabilities and attack techniques.

Skills

Penetration testing

Web app & API testing

Network security fundamentals

OWASP Top 10

Linux/Windows proficiency

Active Directory security

Python/PowerShell/Bash

Risk reporting & analysis

Security tooling familiarity

Education

Diploma/Degree in Cybersecurity/CS/IT

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;
• Familiarwith 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.

EA Licence No. 07C5639