Our Deloitte Cyber team understands the unique challenges and opportunities businesses face in cybersecurity. Join our team to deliver powerful solutions to help our clients navigate the ever-changing threat landscape. Through powerful solutions and managed services that simplify complexity, we enable our clients to operate with resilience, grow with confidence, and proactively manage to secure success.

Work You’ll Do

As a Security Engineer III, you will lead and execute the design, development, testing, and ongoing maintenance of core applications and services that support critical business and mission outcomes. You’ll drive technical direction across the full software development lifecycle—translating ambiguous requirements into scalable designs, delivering well-structured components, and ensuring solutions are secure, performant, resilient, and reliable in production.

You will set a high bar for engineering excellence by writing clean, maintainable, and well-documented code, establishing and evolving engineering standards, and promoting consistent patterns across the codebase. You’ll lead peer code reviews, mentor and guide other engineers, and partner with technical leadership to make architecture and implementation decisions. You’ll proactively identify opportunities to improve code quality, reduce technical debt, strengthen automated testing, and improve developer productivity through better tooling and practices.

In this role, you’ll take ownership of complex debugging and troubleshooting, support releases and production operations as needed, and improve observability through thoughtful logging, metrics, and tracing. You’ll collaborate closely with cross-functional partners—such as product, quality assurance (QA), security, and operations—to shape requirements, manage dependencies, mitigate delivery risks, and ensure smooth execution from development through deployment. You’ll also help plan and execute technical roadmaps, balancing near-term delivery with long-term maintainability and scalability.

The 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 Enterprise Security offering embeds security in all aspects of digital transformation by securing a client’s technical backbone while enabling secure digital transformation. Includes security architecture, secure development and deployment, end-to-end cyber cloud capabilities, application security, and security for emerging technologies and connected products.

Qualifications

Required

• Bachelor’s degree required
• Must be able to obtain and maintain the required TS/SCI clearance for this role
• Ability to travel 5-30%, on average, based on the work you do and the clients and industries/sectors you serve
• 7+ years of experience in High-Performance code design and implementation using C/C++ (or similar C-family languages) or other strongly typed, low-level programming language such as Java or Rust
• Must be legally authorized to work in the United States without the need for employer sponsorship, now or at any time in the future

Preferred:

• Experience with Git
• Experience with Linux