CrawlJobs Logo

Offensive Security Tester

nttdata.com Logo

NTT DATA

Location Icon

Location:
United Kingdom , London

Category Icon
Category:
IT - Software Development

Job Type Icon

Contract Type:
Not provided

Salary Icon

Salary:

Not provided
Save Job
Save Icon
Apply Position

Job Description:

The Offensive Security Tester role at NTT DATA involves conducting advanced penetration testing to identify vulnerabilities in various IT environments. Candidates should have 3-5 years of experience in offensive security, a bachelor's degree in a related field, and relevant certifications. Strong communication skills and technical writing abilities are essential for producing detailed reports and engaging with clients effectively.

Job Responsibility:

  • Conduct comprehensive penetration tests across web applications, network infrastructure, and mobile applications
  • Perform external and internal network penetration testing using industry-standard methodologies
  • Execute wireless security assessments, social engineering engagements, and red team exercises
  • Conduct application security testing, including API and web service assessments
  • Identify, validate, and prioritize security vulnerabilities discovered during testing
  • Analyze attack paths and assess the business impact of identified vulnerabilities
  • Develop proof-of-concept exploits to demonstrate security risks
  • Produce detailed technical reports documenting findings, risks, and remediation recommendations
  • Create executive summaries highlighting business impact and strategic risk concerns
  • Present findings to technical teams and management stakeholders
  • Follow industry-standard penetration testing methodologies (e.g., OWASP, PTES, NIST)
  • Maintain and update penetration testing tools and exploitation frameworks
  • Stay current with the latest attack techniques, vulnerabilities, and security research
  • Communicate effectively with clients throughout testing engagements
  • Coordinate testing activities to minimize business disruption
  • Support scoping discussions and provide security awareness briefings to client teams

Requirements:

  • CREST Registered Penetration Tester (CRT) certification required
  • Must meet UK SC Clearance eligibility guidelines
  • Bachelor’s degree in computer science, Cybersecurity, or related field
  • 3–5 years of experience in penetration testing or offensive security roles
  • Strong technical writing and verbal communication skills
  • Ability to explain complex technical issues to non-technical audiences
  • Excellent time management and attention to detail
  • Direct experience working in government, military, or intelligence organizations advantageous

Nice to have:

  • Additional certifications preferred (e.g., OSCP, GPEN, CEH)
  • Experience conducting red team exercises and adversarial attack simulations
  • Familiarity with threat modeling and risk assessment methodologies
  • Background in information security or IT security operations
What we offer:
  • Tailored benefits that support physical, emotional, and financial wellbeing
  • Continuous growth and development opportunities
  • Flexible work options
  • Inclusive work environment with mutual respect, accountability, and continuous learning
  • Range of Inclusion Networks (e.g., Women’s Business Network, Cultural and Ethnicity Network, LGBTQ+ & Allies Network, Neurodiversity Network, Parent Network)

Additional Information:

Job Posted:
January 26, 2026

Icon
NTT DATA - All Job Offers
Job Link Share:
Copy Link Icon
Facebook Icon Twitter Icon LinkedIn Icon

Looking for more opportunities? Search for other job offers that match your skills and interests.

Briefcase Icon

Similar Jobs for Offensive Security Tester

Security Systems/SW Developer and Tester

As part of our HPE Operations Cybersecurity Lab, the Security Systems/Software E...
Location
Location
United States , Aguadilla
Salary
Salary:
Not provided
https://www.hpe.com/ Logo
Hewlett Packard Enterprise
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor's or Master's degree in Computer Science, Information Systems, or equivalent
  • Typically 4-6 years experience
  • Expertise in multiple software systems design tools and languages
  • Experience of relational database management systems and their query languages (e.g. SQL)
  • Strong Experience writing software using any modern language and technology stack, i.e Python, Javascript, and frameworks for building APIs and user interfaces
  • Knowledge of tools like Metasploit, Nmap, Burp Suite, Wireshark, vulnerability scanning tools, network mapping, and packet analysis
  • Experience in overall architecture of software systems for products, solutions and IT systems
  • Expertize working in a DevSecOps environment
  • Knowledge of OWASP Top 10 vulnerabilities, web-based attacks (SQL injection, XSS, CSRF), and web protocols
  • Experience with encryption methods and their applications
Job Responsibility
Job Responsibility
  • Designs security enhancements, updates, and programming changes for portions and subsystems of systems software, including operating systems, compliers, networking, utilities, databases, and Internet-related tools
  • Analyzes design and determines coding, programming, and integration activities required based on security requirements and general objectives and knowledge of overall architecture of product or solution
  • Design, develop, test, and maintain robust, scalable, and high-quality security and software solutions
  • Supports application and systems security strategy, architecture and roadmaps, review application architectures, code and system services from a security perspective
  • Writes and executes complete security testing plans, protocols, and documentation for assigned portion of application
  • identifies and debugs, and creates solutions for issues with code and integration into application architecture
  • Leads a project team of other software systems engineers and internal and outsourced development partners to develop reliable, cost effective and high quality solutions for assigned systems portion or subsystem
  • Collaborates and communicates with management, internal, and outsourced development partners regarding software systems design status, project progress, and issue resolution
  • Represents the software systems engineering team for all phases of larger and more-complex development projects
  • Provides guidance and mentoring to less-
What we offer
What we offer
  • Health & Wellbeing
  • Personal & Professional Development
  • Unconditional Inclusion
  • Fulltime
Read More
Arrow Right

Security Systems/SW Developer and Tester

As part of our HPE Operations Cybersecurity Lab, the Security Systems/Software E...
Location
Location
United States , Aguadilla
Salary
Salary:
Not provided
https://www.hpe.com/ Logo
Hewlett Packard Enterprise
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor's or Master's degree in Computer Science, Information Systems, or equivalent
  • Typically 4-6 years experience
  • Expertise in multiple software systems design tools and languages
  • Experience of relational database management systems and their query languages (e.g. SQL)
  • Strong Experience writing software using any modern language and technology stack, i.e Python, Javascript, and frameworks for building APIs and user interfaces
  • Knowledge of tools like Metasploit, Nmap, Burp Suite, Wireshark, vulnerability scanning tools, network mapping, and packet analysis
  • Experience in overall architecture of software systems for products, solutions and IT systems
  • Expertize working in a DevSecOps environment
  • Knowledge of OWASP Top 10 vulnerabilities, web-based attacks (SQL injection, XSS, CSRF), and web protocols
  • Experience with encryption methods and their applications
Job Responsibility
Job Responsibility
  • Designs security enhancements, updates, and programming changes for portions and subsystems of systems software, including operating systems, compliers, networking, utilities, databases, and Internet-related tools
  • Analyzes design and determines coding, programming, and integration activities required based on security requirements and general objectives and knowledge of overall architecture of product or solution
  • Design, develop, test, and maintain robust, scalable, and high-quality security and software solutions
  • Supports application and systems security strategy, architecture and roadmaps, review application architectures, code and system services from a security perspective
  • Writes and executes complete security testing plans, protocols, and documentation for assigned portion of application
  • identifies and debugs, and creates solutions for issues with code and integration into application architecture
  • Leads a project team of other software systems engineers and internal and outsourced development partners to develop reliable, cost effective and high quality solutions for assigned systems portion or subsystem
  • Collaborates and communicates with management, internal, and outsourced development partners regarding software systems design status, project progress, and issue resolution
  • Represents the software systems engineering team for all phases of larger and more-complex development projects
  • Provides guidance and mentoring to less-
What we offer
What we offer
  • Health & Wellbeing
  • Personal & Professional Development
  • Unconditional Inclusion
  • Fulltime
Read More
Arrow Right

Security Systems/ SW Developer and Tester

As part of our HPE Operations Cybersecurity Lab, the Security Systems/Software E...
Location
Location
United States , Aguadilla
Salary
Salary:
Not provided
https://www.hpe.com/ Logo
Hewlett Packard Enterprise
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor's or Master's degree in Computer Science, Information Systems, or equivalent
  • Typically 4-6 years experience
  • Expertise in multiple software systems design tools and languages
  • Experience of relational database management systems and their query languages (e.g. SQL)
  • Strong Experience writing software using any modern language and technology stack, i.e Python, Javascript, and frameworks for building APIs and user interfaces
  • Knowledge of tools like Metasploit, Nmap, Burp Suite, Wireshark, vulnerability scanning tools, network mapping, and packet analysis
  • Experience in overall architecture of software systems for products, solutions and IT systems
  • Expertize working in a DevSecOps environment
  • Knowledge of OWASP Top 10 vulnerabilities, web-based attacks (SQL injection, XSS, CSRF), and web protocols
  • Experience with encryption methods and their applications
Job Responsibility
Job Responsibility
  • Designs security enhancements, updates, and programming changes for portions and subsystems of systems software, including operating systems, compliers, networking, utilities, databases, and Internet-related tools
  • Analyzes design and determines coding, programming, and integration activities required based on security requirements and general objectives and knowledge of overall architecture of product or solution
  • Design, develop, test, and maintain robust, scalable, and high-quality security and software solutions
  • Supports application and systems security strategy, architecture and roadmaps, review application architectures, code and system services from a security perspective
  • Writes and executes complete security testing plans, protocols, and documentation for assigned portion of application
  • identifies and debugs, and creates solutions for issues with code and integration into application architecture
  • Leads a project team of other software systems engineers and internal and outsourced development partners to develop reliable, cost effective and high quality solutions for assigned systems portion or subsystem
  • Collaborates and communicates with management, internal, and outsourced development partners regarding software systems design status, project progress, and issue resolution
  • Represents the software systems engineering team for all phases of larger and more-complex development projects
  • Provides guidance and mentoring to less-
What we offer
What we offer
  • Health & Wellbeing
  • Personal & Professional Development
  • Unconditional Inclusion
  • Fulltime
Read More
Arrow Right

Security Systems/ Software Developer and Tester

As part of our HPE Operations Cybersecurity Lab, the Security Systems/Software E...
Location
Location
United States , Aguadilla
Salary
Salary:
Not provided
https://www.hpe.com/ Logo
Hewlett Packard Enterprise
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor's or Master's degree in Computer Science, Information Systems, or equivalent
  • Typically 4-6 years experience
  • Expertise in multiple software systems design tools and languages
  • Experience of relational database management systems and their query languages (e.g. SQL)
  • Strong Experience writing software using any modern language and technology stack, i.e Python, Javascript, and frameworks for building APIs and user interfaces
  • Knowledge of tools like Metasploit, Nmap, Burp Suite, Wireshark, vulnerability scanning tools, network mapping, and packet analysis
  • Experience in overall architecture of software systems for products, solutions and IT systems
  • Expertize working in a DevSecOps environment
  • Knowledge of OWASP Top 10 vulnerabilities, web-based attacks (SQL injection, XSS, CSRF), and web protocols
  • Experience with encryption methods and their applications
Job Responsibility
Job Responsibility
  • Designs security enhancements, updates, and programming changes for portions and subsystems of systems software, including operating systems, compliers, networking, utilities, databases, and Internet-related tools
  • Analyzes design and determines coding, programming, and integration activities required based on security requirements and general objectives and knowledge of overall architecture of product or solution
  • Design, develop, test, and maintain robust, scalable, and high-quality security and software solutions
  • Supports application and systems security strategy, architecture and roadmaps, review application architectures, code and system services from a security perspective
  • Writes and executes complete security testing plans, protocols, and documentation for assigned portion of application
  • identifies and debugs, and creates solutions for issues with code and integration into application architecture
  • Leads a project team of other software systems engineers and internal and outsourced development partners to develop reliable, cost effective and high quality solutions for assigned systems portion or subsystem
  • Collaborates and communicates with management, internal, and outsourced development partners regarding software systems design status, project progress, and issue resolution
  • Represents the software systems engineering team for all phases of larger and more-complex development projects
  • Provides guidance and mentoring to less-
What we offer
What we offer
  • Health & Wellbeing
  • Personal & Professional Development
  • Unconditional Inclusion
  • Fulltime
Read More
Arrow Right

Security Systems/ Software Developer and Tester

The Security Systems/Software Developer and Tester will support the design, deve...
Location
Location
United States , Aguadilla
Salary
Salary:
Not provided
https://www.hpe.com/ Logo
Hewlett Packard Enterprise
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor's or Master's degree in Computer Science, Information Systems, or equivalent
  • Typically 4-6 years experience
  • Expertise in multiple software systems design tools and languages
  • Experience of relational database management systems and their query languages (e.g. SQL)
  • Strong experience writing software using any modern language and technology stack, i.e Python, Javascript, and frameworks for building APIs and user interfaces
  • Knowledge of tools like Metasploit, Nmap, Burp Suite, Wireshark, vulnerability scanning tools, network mapping, and packet analysis
  • Experience in overall architecture of software systems for products, solutions and IT systems
  • Expertise working in a DevSecOps environment
  • Knowledge of OWASP Top 10 vulnerabilities, web-based attacks (SQL injection, XSS, CSRF), and web protocols
  • Experience with encryption methods and their applications
Job Responsibility
Job Responsibility
  • Design security enhancements, updates, and programming changes for portions and subsystems of systems software, including operating systems, compilers, networking, utilities, databases, and Internet-related tools
  • Analyze design and determine coding, programming, and integration activities required based on security requirements and general objectives
  • Design, develop, test, and maintain robust, scalable, and high-quality security and software solutions
  • Support application and systems security strategy, architecture, and roadmaps
  • Review application architectures, code, and system services from a security perspective
  • Write and execute complete security testing plans, protocols, and documentation
  • Identify and debug issues, and create solutions for code and integration
  • Lead a project team of software systems engineers and outsourced development partners
  • Collaborate and communicate with management and development partners regarding software systems design status, project progress, and issue resolution
  • Represent the software systems engineering team for all phases of larger and more-complex development projects
What we offer
What we offer
  • Comprehensive suite of benefits that supports physical, financial, and emotional wellbeing
  • Investment in personal and professional development through specific career programs
  • Inclusive work environment and recognition of individual uniqueness.
  • Fulltime
Read More
Arrow Right

Senior Penetration Tester

As a Penetration Tester, you'll conduct regular, comprehensive security assessme...
Location
Location
Belgium , Brussels
Salary
Salary:
Not provided
https://www.soprasteria.com Logo
Sopra Steria
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Minimum of 5 years' experience in one or more of the following areas: Penetration Tester, Red/Purple Team Member, Security Engineer
  • Knowledge of technologies up to system level (web frameworks, communications protocols, database systems)
  • Offensive security knowledge of cyber-attack techniques, vulnerabilities, and mitigation strategies
  • Knowledge of penetration testing tools, frameworks, and methodology
  • Skills using Kali Linux, Nmap, PowerShell, Metasploit, Cobalt Strike, OWASP ZAP, Burp Suite
  • Proficiency in scripting
  • Awareness of frameworks such as MITRE ATT&CK and NIST and how they can be applied effectively within an enterprise
  • Familiarity with the latest exploits, tactics, techniques, and procedures (TTP), vulnerability remediation and security trends
  • Cyber security qualifications from Offensive Security, SANS, Pentester Academy, CREST, eLearnSecurity or others
Job Responsibility
Job Responsibility
  • Scoping and executing of complex penetrations test across a wide scope of technologies, products, services, and applications and critical infrastructure companies
  • Helping the team to define and improve the internal security testing programme
  • Documenting technical issues both Cyber and IT related during testing assessments
  • Improve our monitoring services by working in purple style exercises and operating in a red team capacity to improve the ability to detect and respond to threats
  • Supporting incident response by providing context and expertise around cyber threats
  • Mentor to our junior & medior colleagues
What we offer
What we offer
  • Extensive career development opportunities, both local and international
  • Part of a dynamic network of 56,000 professionals at all stages of their careers
  • Wide array of offices to explore
  • Fulltime
Read More
Arrow Right

Senior Penetration Tester

The role involves conducting deep-dive vulnerability assessments on a variety of...
Location
Location
Singapore , Singapore
Salary
Salary:
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor’s degree with a minimum of 5 years of experience
  • Expertise in Java, JavaScript (React, Node.js), .NET (ASP.NET, C#, Webflow, MVC, WebAPI), Application Infrastructure (Web/Application Servers, Databases, Middleware Components), and Cloud Computing (Google Cloud Platform, AWS, Azure)
  • Expertise in application security, ethical hacking using security tools (Burp Suite, AppScan), knowledge of OWASP Top 10, CWE/SANS Top 25, Threat Modeling
  • Industry-accredited security certifications such as GIAC GWAPT, GPEN, GXPN, OSCP and/or CISSP
Job Responsibility
Job Responsibility
  • Act as a subject matter expert in offensive information security
  • Drive remediation by outlining a defense-in-depth approach
  • Report and articulate vulnerability assessment results
  • Contribute to the review of internal processes and activities
  • Fulltime
Read More
Arrow Right

Senior Penetration Tester

A senior penetration tester's main responsibility is to execute highly complex a...
Location
Location
Belgium , Olen
Salary
Salary:
Not provided
belden.com Logo
Belden, Inc
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 5+ years of hands-on experience in penetration testing, red teaming, or a related offensive security role
  • Relevant industry certifications such as Offensive Security Certified Professional (OSCP), Certified Ethical Hacker (CEH), or GIAC certifications (e.g., GPEN, GWAPT)
  • Proficiency in at least one scripting language (e.g., Python, Ruby, PowerShell) for automating tasks and developing custom tools
  • Deep knowledge of Windows and Linux/Unix operating systems
  • Strong understanding of TCP/IP, network protocols, and common network services
  • Extensive experience with common web vulnerabilities (e.g., OWASP Top 10) and familiarity with various web application frameworks
  • Experience with penetration testing in at least one major cloud provider (e.g., AWS, Azure)
  • Excellent written and verbal communication skills
  • Strong problem-solving and analytical abilities
  • Ability to work independently and as part of a team
Job Responsibility
Job Responsibility
  • Executing Advanced Penetration Tests: conduct in-depth security assessments on complex systems, including web applications, cloud environments, networks, and mobile applications
  • Developing Custom Tools and Exploits: develop own scripts and exploits to bypass sophisticated security controls and find zero-day vulnerabilities
  • Technical Mentorship: Guiding and mentoring junior and mid-level testers
  • Reporting and Communication: writing detailed technical reports that clearly outline vulnerabilities, their potential impact, and actionable recommendations for remediation
  • Staying Current: continuously research new threats, attack vectors, and security technologies
Read More
Arrow Right
Jobs by Category
Art and Entertainment Jobs Banking Jobs Call Center Jobs Construction Jobs Consulting Jobs Customer Service Jobs Education Jobs Energy Jobs Finance Jobs Gastronomy Jobs Health and Beauty Jobs Hospitality and Tourism Jobs Human Resources Jobs Insurance Jobs IT - Administration Jobs IT - Software Development Jobs Legal Jobs Logistics Jobs Manufacturing Jobs Marketing, Digital Marketing, SEO, SEM Jobs Media Jobs Nursing Jobs Office Administration Jobs Pharmacy Jobs Physical Work Jobs Public Relations Jobs Public Sector Jobs Purchasing Jobs Quality Control Jobs Real Estate Jobs Research and Development Jobs Sales Jobs
Job Positions Jobs by Country
United States Jobs United Kingdom Jobs India Jobs Canada Jobs Australia Jobs Germany Jobs Ireland Jobs Poland Jobs
Company
Blog About Us Contact
Follow Us
Facebook
X (Twitter)
LinkedIn
Instagram
CrawlJobs Group
ITFlashcards AllDevBlogs
© 2026 CrawlJobs Ltd. All Rights Reserved
Terms & Conditions Privacy Policy