Senior Security Consultant (Web Application Penetration Tester)

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NetSPI seeks a Senior Security Consultant to perform thorough web application security assessments, produce actionable reports, mentor peers, and shape testing strategies across client environments in a remote United Kingdom role. In this position you will conduct engagements on web apps and APIs, review QA, and develop new techniques and tooling. You’ll need 3-5 years of pentesting experience, familiarity with offensive tools (Kali Linux, Burp Suite, Metasploit, Nessus), strong knowledge of the OWASP Top 10, MITRE ATT&CK, and Windows, Linux and MacOS internals, plus excellent written and verbal communication. Ideal candidates have mentoring experience, programming or scripting skills (Ruby, Python, Java, C#), and relevant certifications (OSCP, GPEN, GWAPT, GXPN). Emphasize client impact, clear reporting, collaboration, and travel willingness 5-10%.

NetSPI® is an award-winning pioneer of Penetration Testing as a Service (PTaaS) with its AI-powered platform supported by more than 350 in-house cybersecurity experts. Specializing in 50+ pentest types, attack surface visibility, vulnerability prioritization, and attack simulation, NetSPI delivers security testing with unprecedented clarity, speed, and scale.  

NetSPI is on an exciting growth journey as we disrupt and improve the proactive security market. We are looking for individuals with a collaborative, innovative, and customer-first mindset to join our team. Learn more about our award-winning workplace culture and get to know our A-Team at www.netspi.com/careers. 

Join the mission as a Senior Security Consultant. We are seeking a skilled and detail-oriented Penetration Tester to conduct thorough security assessments, identify vulnerabilities, and provide expert recommendations to strengthen our clients' security posture. As a Penetration Tester supporting web applications, you will work closely with clients to deliver clear, actionable reports and contribute to the development of security best practices. 

Responsibilities: 

• Conduct engagements on web applications and underlying APIs independently and provide technical oversight 

• Review reports for accuracy in technical oversight, perform weekly QA oversight, and provide mentoring support to others 

• Create, deliver, and collaborate on penetration testing reports in diverse client environments, maintaining client-specific processes, reporting standards, and access protocols to help improve their security posture 

• Research and develop innovative techniques, tools, and methodologies for penetration testing services, alongside commitment to improvement and execution on NetSPI specific products and processes 

• Participate in development, implementation, and oversight of testing, delivery, and management strategies for key client accounts  

• Perform administrative tasks related to day-to-day consulting activities to ensure smooth business and engagement operations. 

Minimum Qualifications: 

• Bachelor’s degree or higher, with a focus on IT, Computer Science, Engineering or Math or equivalent experience 

• Minimum of 3-5 years of work experience in Penetration Testing 

• Familiarity with offensive tools, based on applicable skillset (e.g., Kali Linux, Burp Suite, Metasploit, Nessus) 

• Familiarity with offensive and defensive IT concepts and protocols 

• Extensive understanding of the OWASP Top 10, MITRE ATT&CK framework, and various security frameworks. 

• Working knowledge of Windows, Linux and MacOS operating systems internals 

• Experience mentoring or coaching to growing team members, while sharing knowledge externally through blogs, hosting webinars, or presenting at conferences   

• Ability to work independently and as part of a team 

• Proficient communication skills, both written and verbal 

• Willingness to travel up to 5-10%  

• This position requires an 8-hour workday, with occasional evenings or weekends necessary to meet project deadlines or critical needs 

Preferred Qualifications: 

• Ability to provide technical and QA oversight on web applications and underlying APIs.  

• Experience in one or more of the following programming or scripting languages (e.g., Ruby, Python, Perl, C, C++, Java, and C#)  

• Offensive cybersecurity certifications (e.g., GXPN, GPEN, OSCP, GWAPT) 

We are an equal employment opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability status, protected veteran status or any other characteristic protected by law.