Senior Information Security Engineer

Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we’re helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Senior Information Security Engineer Senior Information Security Engineer, Cryptographic Compliance & Risk Management Location: O'Fallon, MO Position Overview Mastercard is seeking a highly motivated security professional to join the Cryptographic Compliance & Risk Management team. This role is responsible for strengthening Mastercard's enterprise cryptographic governance capabilities by assessing compliance with cryptographic and key management requirements, identifying risk, and driving remediation across technology platforms. As cryptographic threats, regulatory expectations, and technology ecosystems continue to evolve, this position will help ensure that Mastercard's applications, infrastructure, cloud services, and operational environments comply with enterprise security standards and industry regulations. The ideal candidate combines technical security expertise with risk management and governance skills and can effectively influence stakeholders to achieve sustainable compliance outcomes. Key Responsibilities • Drive execution of Mastercard's Cryptographic Compliance strategy and roadmap. • Assess applications, platforms, infrastructure, cloud environments, and services for adherence to cryptographic and key management standards. • Identify cryptographic compliance gaps, control weaknesses, and security risks, and partner with stakeholders to develop remediation plans. • Provide guidance on risk-based remediation approaches, compensating controls, and modernization strategies for legacy cryptographic implementations. • Support enterprise-wide cryptographic assessments, reviews, audits, and reporting activities. • Collaborate with engineering, architecture, product, infrastructure, and security teams to integrate cryptographic requirements into technology delivery processes. • Define, document, and maintain repeatable governance processes, compliance validation activities, and control assessment methodologies. • Analyze emerging regulatory, industry, and security requirements and translate them into actionable guidance. • Develop metrics, dashboards, and reports that provide visibility into cryptographic compliance posture, risk exposure, and remediation progress. • Support strategic initiatives including: o Cryptographic inventory and discovery o Key management modernization o Cryptographic risk reduction programs o Post-Quantum Cryptography (PQC) readiness and migration planning • Influence technology teams and business partners to prioritize remediation activities and achieve compliance objectives. Required Qualifications • Experience in Information Security, Security Risk Management, Governance, Risk and Compliance (GRC), or Security Engineering. • Strong understanding of information security principles, risk management frameworks, and compliance practices. • Knowledge of applied cryptography and key management concepts, including: o Encryption o Hashing o Digital certificates o TLS/SSL o PKI o HSMs o PKCS#12 • Experience assessing security controls and driving remediation in complex enterprise environments. • Familiarity with industry and regulatory standards, including: o PCI DSS o FIPS o ISO 27001/27002 o NIST frameworks and guidance • Ability to evaluate risk, prioritize remediation efforts, and influence technical and non-technical stakeholders. • Strong analytical, problem-solving, verbal, and written communication skills. • Ability to communicate