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

  • Conduct authorized penetration tests and security assessments on internal and external networks, wireless systems, cloud environments, web and mobile applications, APIs, and supporting infrastructure.

  • Plan, scope, and execute comprehensive vulnerability assessments using manual techniques and automated tooling.

  • Perform network discovery, exploitation, privilege escalation, pivoting, and post-exploitation activities, leveraging best-practice offensive frameworks.

  • Identify and exploit vulnerabilities in systems, applications, and services (e.g., misconfigurations, insecure controls, authentication flaws, and code-level issues).

  • Develop detailed, professional written reports outlining findings, risk impacts, exploit evidence, and prioritized remediation recommendations.

  • Work collaboratively with IT, engineering, and security operations teams to remediate vulnerabilities and verify fixes.

  • Assist in improving internal security processes, policies, testing methodologies, and frameworks.

  • Stay current on emerging threats, exploit techniques, offensive tooling, and defensive controls — sharing knowledge across the organization.

  • Support incident response activities when required by helping analyze intrusions or assist with forensic evidence.

  • Participate in red-team and adversary emulation engagements to validate organizational resiliency.

Required Qualifications

  • Minimum five years of professional experience in penetration testing or offensive security roles.

  • Deep understanding of TCP/IP networking, system architecture (Windows, Linux/Unix), and secure/ insecure protocols.

  • Strong knowledge of penetration testing methodologies (e.g., OWASP, PTES) and offensive tools such as Metasploit, Burp Suite, Nmap, Wireshark, etc.

  • Hands-on experience with vulnerability analysis, exploitation frameworks, scripting languages (Python, Bash, PowerShell), and real-world attack techniques.

  • Familiarity with cloud security concepts (AWS, Azure, GCP) and testing cloud-native resources.

  • Excellent technical writing and verbal communication skills with the ability to present complex findings to technical and non-technical stakeholders.

  • Strong problem-solving, analytical skills and a disciplined, ethical approach to security testing.

  • Ability to handle sensitive information with strict confidentiality and professionalism.

Preferred Qualifications

  • Industry certifications such as:

    • CEH (Certified Ethical Hacker)

    • OSCP / OSCE (Offensive Security Certified Professional/Expert)

    • GPEN, eCPPT, or similar offensive security accreditation.

  • Experience with advanced testing techniques — social engineering, phishing simulations, hardware hacking, or wireless exploitation.

  • Familiarity with secure DevOps and CI/CD environments.

  • Background in threat emulation, red-team operations, or adversary-simulation frameworks.

What We Offer

  • Competitive compensation and flexible work arrangements.

  • Access to advanced testing environments, security tooling, and ongoing training.

  • Opportunities for professional growth into senior cyber-security and leadership roles.

  • Collaborative culture with experienced security professionals dedicated to protecting critical assets.

  • Exposure to diverse client systems and high-impact engagements.

How to Apply

Please send the following:

  • Resume or CV detailing relevant penetration testing experience.

  • Copies of relevant certifications or training records.

  • Optional: A brief portfolio of past assessments (sanitized, non-confidential).

Upload your CV/resume
Maximum file size: 8 MB.

Technical Security. 
Tactical Expertise. 
Total Confidence.

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

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