Type of Requisition:RegularClearance Level Must Currently Possess:Top Secret SCI + PolygraphClearance Level Must Be Able to Obtain:NonePublic Trust/Other Required:NoneJob Family:Cyber and IT Risk ManagementJob Qualifications:Skills:Data Reporting, Networks, Risk ManagementCertifications:NoneExperience:8 + years of related experienceUS Citizenship Required:YesJob Description:OWN YOUR OPPORTUNITYExplore a career in cyber at GDIT and you’ll find endless opportunities to grow alongside colleagues who share your focus on defending and protecting what matters.Advance how our customers operate while you advance your career. Join GDIT as an Ethical Hacker/Penetration Tester Sr Principal and build an impactful career in enterprise IT, collaborating with people who are driven and resourceful like you.MEANINGFUL WORK AND PERSONAL IMPACTConduct internal penetration testing and vulnerability assessment of servers, web applications, web services, and databasesManually exploit and compromise operating systems, web applications, and databasesExamine results of web/OS scanners, scans and static source code analysisIdentify vulnerabilities, misconfigurations, and compliance issuesWrite final reports, defend all findings to include the risk or vulnerability, mitigation strategies, and referencesAbility to meet and coordinate with various audiences to include developers, system administrators, project managers, and senior government stakeholdersProvide security recommendations for developers, system administrators, project managers, and senior government stakeholdersReport vulnerabilities identified during security assessmentsWrite penetration testing Rules of Engagements (RoE), Test Plans, and Standard Operating Procedures (SOP)Conduct security reviews, technical research, and provided reporting to increase security defense mechanismsMake recommendations to the IC CISO or designee for improving TTPS for better cyber threat protection.WHAT YOU’LL NEED TO SUCCEEDBring your technology expertise and drive for innovation to GDIT. The Ethical Hacker/Penetration Tester Sr Principal must have:Education: Bachelor’s degree in computer engineering, Computer Science, Electrical Engineering, Information systems, Information Technology, Cybersecurity, or a closely related discipline.A Master’s degree in an applicable discipline be substituted for three years of demonstrated work experienceExperience: 8+ years of related experienceSecurity clearance level: TS/SCI with PolygraphUS citizenship requiredDESIRED SKILLSCertifications: CEH – Certified Ethical Hacker Certification, CPT – Certified Penetration TesterStrong writing skillsExperience with NIST 800-53 and Risk Management FrameworkKnowledge of system and application security threats and vulnerabilitiesKnowledge of network access, identity, and access management e.g. public key infrastructure (PKI).Knowledge of network protocols such as Transition Control Protocol/Internet Protocol (TCP/IP), Dynamic Host Configuration, Domain Name System (DNS), and directory Services.Ability to assess the robustness of security systems and designs.Knowledge of cybersecurity principles and organizational requirements (relevant to confidentiality, integrity, availability, authentication, non-repudiation).Write final reports and defend all findings, including risk or vulnerability, mitigation strategies, and references.Report vulnerabilities identified during security assessments.Conducted security reviews, technical research and provided reporting to increase security defense mechanisms.Travel Domestic 0-25%.GDIT IS YOUR PLACEAt GDIT, the mission is our purpose, and our people are at the center of everything we do.Growth: AI-powered career tool that identifies career steps and learning opportunitiesSupport: An internal mobility team focused on helping you achieve your career goalsRewards: Comprehensive benefits and wellness packages, 401K with company match, and competitive pay and paid time offCommunity: Award-winning culture of innovation and a military-friendly workplace#WeAreGDIT#JET#VA_2026AlumniThe likely salary range for this position is $172,144 - $232,900. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range.Scheduled Weekly Hours:40Travel Required:Less than 10%Telecommuting Options:OnsiteWork Location:USA MD BethesdaAdditional Work Locations:Total Rewards at GDIT:Our benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most. Our Identity Verification Process:As part of the hiring process, we will ask you to complete an identity verification process that leverages advanced biometrics and artificial intelligence to ensure authenticity and protect against identity fraud. You are expected to be on camera during virtual interviews. We reserve the right to take your picture to verify your identity and prevent fraud. By proceeding, you authorize the collection, processing, and use of your biometric data for identity verification and security purposes. About Our Work:We are GDIT. A global technology and professional services company that delivers technology solutions and mission services to every major agency across the U.S. government, defense and intelligence community. Our 26,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50+ countries worldwide, offering leading mission-ready capabilities in AI, cloud, cyber and software development.Join our Talent Community to stay up to date on our career opportunities and events atgdit.com/tc.Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans