Senior Systems and Infrastructure Engineer, Information Security, Post-Quantum Cryptography (PQC)

Position Summary...
We are seeking a highly experienced and strategic Senior Systems and Infrastructure Engineer, Information Security with deep expertise in Post-Quantum Cryptography (PQC) to join our Cryptography team. In this role, you will serve as a technical leader driving the design, adoption, and evolution of quantum-resistant cryptographic solutions across enterprise systems. You will play a critical role in shaping long-term security strategy, influencing architecture decisions, and ensuring resilience against emerging cryptographic threats.

What you'll do...

• Lead the design and architecture of secure systems and applications, providing expert guidance on integrating Post-Quantum Cryptography into enterprise environments.
• Define and drive cryptographic strategy and roadmap
  , ensuring alignment with evolving PQC standards (e.g., NIST PQC) and organizational security objectives.
• Evaluate and guide adoption of cryptographic technologies
  , including key exchange mechanisms, digital signatures, and message authentication schemes in a post-quantum context.
• Partner with hardware and cryptographic vendors to influence product direction, evaluate capabilities, and ensure alignment with long-term security requirements.
• Assess emerging threats and advancements in quantum computing and cryptography, translating research into actionable engineering practices and risk mitigation strategies.
• Design, implement, and oversee enterprise-scale cryptographic solutions
  , ensuring compliance with industry standards and regulatory requirements.
• Drive modernization of security protocols (e.g., TLS, SSH, IPsec) to support hybrid and quantum-resistant cryptographic approaches.
• Mentor and guide engineers
  , establishing best practices for secure development, cryptographic implementation, and infrastructure security.
• Lead cross-functional initiatives
  , collaborating with engineering, infrastructure, and security teams to embed cryptographic controls into platforms and services.
• Communicate complex cryptographic concepts and risks to senior leadership, architects, and non-technical stakeholders to support informed decision-making.

Qualifications

• Advanced expertise in cryptographic systems
  , including key exchange protocols, digital signatures, and message authentication codes, with real-world implementation experience.
• Deep understanding of Post-Quantum Cryptography
  , including algorithms, migration strategies, and impact on existing systems.
• Strong experience with modern security protocols (TLS, SSH, IPsec) and their cryptographic foundations.
• Proven ability to design and scale secure architectures in large, complex enterprise environments.
• Demonstrated experience leading technical initiatives and influencing architecture decisions across teams.
• Excellent communication and stakeholder management skills, with the ability to translate complex concepts into clear guidance.
• Strong analytical, problem-solving, and risk assessment capabilities.
• Experience working with hardware security modules (HSMs) or cryptographic hardware is highly desirable.
• Relevant certifications (e.g., CISSP, Security+, or advanced cryptography/security credentials) are a plus.

Why Join Us

Join a forward-thinking team at the forefront of cryptographic innovation. You will have the opportunity to shape how the organization prepares for the quantum era, building resilient, future-proof security solutions that protect critical systems and data.

At Walmart, we offer competitive pay as well as performance-based bonus awards and other great benefits for a happier mind, body, and wallet. Health benefits include medical, vision and dental coverage. Financial benefits include 401(k), stock purchase and company-paid life insurance. Paid time off benefits include PTO (including sick leave), parental leave, family care leave, bereavement, jury duty, and voting. Other benefits include short-term and long-term disability, company discounts, Military Leave Pay, adoption and surrogacy expense reimbursement, and more.

You will also receive PTO and/or PPTO that can be used for vacation, sick leave, holidays, or other purposes. The amount you receive depends on your job classification and…