Security Engineer III (Pen Tester)

• Cross-site scripting (XSS)
• SQL injection (SQLi)
• Cross-site request forgery (CSRF)
• Server-side request forgery (SSRF)
• Authentication and authorization flaws (e.g., broken access control, privilege escalation)
• Session management issues, insecure deserialization, security misconfiguration, and business logic vulnerabilities

Network and infrastructure testing: Identify and validate weaknesses such as exposed services, weak segmentation, insecure protocols, credential issues, and misconfigurations across on-prem and cloud assets.

Post-exploitation analysis (when in scope): Assess blast radius, lateral movement paths, sensitive data exposure, and persistence risks; collect evidence responsibly and minimize operational impact.

Reporting & remediation support: Deliver clear reports including reproduction steps, risk ratings, evidence, and prioritized fixes; communicate effectively with both engineers and non-technical stakeholders; retest fixes as needed.

A successful candidate would possess these skills:

• Ability to work independently and collaborate as part of a team
• Effective written and verbal communication skills
• Meticulous attention to detail and quality of work product
• Ability to build and sustain professional relationships
• Ability to lead projects or workstreams
• Ability to manage and prioritize multiple tasks in a fast-paced and dynamic environment
• Strong interpersonal skills and professional demeanor
• Ability to meet deadlines
• Ability to provide clear guidance to others

The Team

Deloitte's Government & Public Services (GPS) practice - our people, ideas, technology and outcomes - is designed for impact. Serving federal, state, & local government clients as well as public higher education institutions, our team of professionals brings fresh perspective to help clients anticipate disruption, reimagine the possible, and fulfill their mission promise.

Our Cyber Defense & Resilience offering assists clients in defending against advanced threats by transforming security operations, monitoring technology, data analytics, and threat intelligence. Helps manage and protect dynamic attack surfaces and provides rapid crisis and cyber incident response, ensuring clients can be ready for, respond to, and recover from business disruptions.

The Project Delivery Talent Model is designed for professionals with specialized skills that align to a current client need. Team members focus on delivering services to clients, without additional expectations related to business development or promotion. Their employment is tied to their role on a project, and they are eligible for a benefits package that is competitive for project delivery-focused professionals.

Qualifications

Required:

• Bachelor's degree required.
• Must be legally authorized to work in the United States without the need for employer sponsorship, now or at any time in the future.
• Must be able to obtain and maintain the required clearance for this role.
• 3+ years of hands-on experience in penetration testing to include the following :
• Strong understanding of web application security, OWASP Top 10, and modern attack techniques against web apps and APIs.
• Proficiency with industry-standard tools such as Burp Suite, Nmap, Metasploit, and scripting for automation (e.g., Python/PowerShell/Bash), plus comfort writing lightweight proof-of-concepts.
• Demonstrated ability to distinguish false positives vs. exploitable issues, document evidence, and provide pragmatic, developer-friendly remediation guidance.
• Familiarity with common auth patterns (OAuth 2.0, OpenID Connect, SAML), API paradigms (REST/GraphQL), and modern app architectures (microservices, containers) is strongly preferred.

Preferred:

• Certifications such as OSCP, OSWEP, CRTO, or eJPT (eLearnSecurity Junior Penetration Tester) are highly desirable.
• 1+ years experience within the following:
• Experience with mobile (Android/iOS) testing, cloud penetration testing (AWS/Azure/GCP), or CI/CD and supply chain testing.
• Relevant certifications (examples: OSCP, GWAPT, GPEN, PNPT) or equivalent proven experience.
• Proven experience with adversary simulation, adversary emulation, or red team operations.

Deloitte is committed to providing reasonable accommodations for people with disabilities. If you require a reasonable accommodation to participate in the recruiting process, please direct your inquiries to the Global Call Center (GCC) at USTalentCICInbox@deloitte.com.

Recruiting tips

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Benefits

At Deloitte, we know that great people make a great organization. We value our people and offer employees a broad range of benefits. Learn more about what working at Deloitte can mean for you.

Our people and culture

Our inclusive culture empowers our people to be who they are, contribute their unique perspectives, and make a difference individually and collectively. It enables us to leverage different ways of thinking, ideas, and perspectives, and bring more creativity and innovation to help solve our clients' most complex challenges. This makes Deloitte one of the most rewarding places to work.

Our purpose

Deloitte's purpose is to make an impact that matters for our people, clients, and communities. At Deloitte, purpose is synonymous with how we work every day. It defines who we are. Our purpose comes through in our work with clients that enables impact and value in their organizations, as well as through our own investments, commitments, and actions across areas that help drive positive outcomes for our communities. Learn more.

Professional development

From entry-level employees to senior leaders, we believe there's always room to learn. We offer opportunities to build new skills, take on leadership opportunities and connect and grow through mentorship. From on-the-job learning experiences to formal development programs, our professionals have a variety of opportunities to continue to grow throughout their career.

As used in this posting, "Deloitte" means Deloitte Transactions and Business Analytics LLP, a subsidiary of Deloitte LLP. Please see www.deloitte.com/us/about for a detailed description of the legal structure of Deloitte LLP and its subsidiaries.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or protected veteran status, or any other legally protected basis, in accordance with applicable law.

Requisition code: 352949

Job ID 352949

Client-provided location(s): Arlington, VA

Job ID: Deloitte-352949

Employment Type: OTHER

Posted: 2026-05-29T19:09:55