Network Penetration Testoer
Ethical Hacker / Network Penetration Tester
- Part Time
- Remote
We are seeking a highly skilled Ethical Hacker / Network Penetration Tester to join our cybersecurity team. The ideal candidate will possess hands-on experience in offensive security, vulnerability discovery, exploitation, and IT infrastructure testing. You will be responsible for simulating real-world attacks against enterprise networks, applications, and systems to identify weaknesses before malicious actors do.
Key Responsibilities
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Conduct authorized penetration tests and security assessments on internal and external networks, wireless systems, cloud environments, web and mobile applications, APIs, and supporting infrastructure.
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Plan, scope, and execute comprehensive vulnerability assessments using manual techniques and automated tooling.
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Perform network discovery, exploitation, privilege escalation, pivoting, and post-exploitation activities, leveraging best-practice offensive frameworks.
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Identify and exploit vulnerabilities in systems, applications, and services (e.g., misconfigurations, insecure controls, authentication flaws, and code-level issues).
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Develop detailed, professional written reports outlining findings, risk impacts, exploit evidence, and prioritized remediation recommendations.
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Work collaboratively with IT, engineering, and security operations teams to remediate vulnerabilities and verify fixes.
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Assist in improving internal security processes, policies, testing methodologies, and frameworks.
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Stay current on emerging threats, exploit techniques, offensive tooling, and defensive controls — sharing knowledge across the organization.
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Support incident response activities when required by helping analyze intrusions or assist with forensic evidence.
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Participate in red-team and adversary emulation engagements to validate organizational resiliency.
Required Qualifications
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Minimum five years of professional experience in penetration testing or offensive security roles.
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Deep understanding of TCP/IP networking, system architecture (Windows, Linux/Unix), and secure/ insecure protocols.
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Strong knowledge of penetration testing methodologies (e.g., OWASP, PTES) and offensive tools such as Metasploit, Burp Suite, Nmap, Wireshark, etc.
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Hands-on experience with vulnerability analysis, exploitation frameworks, scripting languages (Python, Bash, PowerShell), and real-world attack techniques.
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Familiarity with cloud security concepts (AWS, Azure, GCP) and testing cloud-native resources.
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Excellent technical writing and verbal communication skills with the ability to present complex findings to technical and non-technical stakeholders.
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Strong problem-solving, analytical skills and a disciplined, ethical approach to security testing.
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Ability to handle sensitive information with strict confidentiality and professionalism.
Preferred Qualifications
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Industry certifications such as:
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CEH (Certified Ethical Hacker)
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OSCP / OSCE (Offensive Security Certified Professional/Expert)
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GPEN, eCPPT, or similar offensive security accreditation.
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Experience with advanced testing techniques — social engineering, phishing simulations, hardware hacking, or wireless exploitation.
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Familiarity with secure DevOps and CI/CD environments.
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Background in threat emulation, red-team operations, or adversary-simulation frameworks.
What We Offer
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Competitive compensation and flexible work arrangements.
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Access to advanced testing environments, security tooling, and ongoing training.
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Opportunities for professional growth into senior cyber-security and leadership roles.
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Collaborative culture with experienced security professionals dedicated to protecting critical assets.
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Exposure to diverse client systems and high-impact engagements.
How to Apply
Please send the following:
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Resume or CV detailing relevant penetration testing experience.
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Copies of relevant certifications or training records.
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Optional: A brief portfolio of past assessments (sanitized, non-confidential).
NYS Watch, Guard or Patrol Agency 11000201106
NYS Security Installer 12000332886
Our Address
1 Liberty Plaza
23rd Floor
New York, NY 10006
Contact Us
+1 (646) 558-0051
info@klcsecurity.com
