MastercardO'Fallon 63368
Full Time
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Sr. Information Security Engineer

Full Time Mastercard, 2200 Master Card Blvd, O'Fallon, MO 63368, United States


We work to connect and power an inclusive, digital economy that benefits everyone, everywhere by making transactions safe, simple, smart and accessible. Using secure data and networks, partnerships and passion, our innovations and solutions help individuals, financial institutions, governments and businesses realize their greatest potential. Our decency quotient, or DQ, drives our culture and everything we do inside and outside of our company. We cultivate a for all employees that respects their individual strengths, views, and experiences. We believe that our differences enable us to be a better team – one that makes better decisions, drives innovation and delivers better business results.

Sr. Information Security Engineer

Job Spec

Mastercard is seeking candidates to join our Application Security team in St. Louis, MO.

Mastercard is developing the next generation of applications and services to enable consumers and businesses to securely, efficiently, and intelligently conduct payment transactions, and is leveraging state-of-the-art cryptographic equipment to protect its assets.

Whether through traditional retail, mobile, or e-commerce, Mastercard innovation is leading the digital convergence of traditional and emerging payments technologies across a wide variety of new devices and services.

• Can you demonstrate expertise in information security, and more specifically, with cryptography?

• Can you advise development teams on how to implement securely cryptographic algorithms, and how to interface with an Hardware Security Module?

• Can you manage the relationship with vendors, understanding market trends, and forecast impacts on the payment industry?

• Can you navigate through the many security frameworks (PCI, FIPS, ISO) with respect to cryptographic standards?

• Can you properly weight the pros and cons of implementing hardware cryptography, in order to help in the design of productive yet secure applications?


• Provide technical design and architecture advice to internal teams on how to securely develop and build applications and supporting systems

• Define secure mechanisms for critical business functions, for both on-premises and in cloud environments

• Work closely with Hardware Security Module vendors to follow up on product lifecycle, product roadmap, new functionalities and issues.

• Assist in the strategy, standards, and architecture for the cryptography, PKI and key management aspects of the SDLC including application, mobile, web service, DevOps, cloud, and CI/CD efforts

All About You

• Experience providing secure design advice for web-based environments and secure communication, including mobile applications, web applications and web services

• Demonstrate a broad awareness of security engineering concepts and practices across all phases of the software development lifecycle

• Strong understanding of information security, risk and data privacy within the domain of digital commerce including relevant practical experience

• Knowledge of cryptography, including several of the following: encryption, hashing, key management, digital certificates, TLS, PKCS#11, HSMs

• Demonstrate technical competency in security engineering based on hands-on experience or relevant qualifications

• Working knowledge and technical security experience with UNIX, Linux, Solaris, AIX, or Windows.

• Demonstrate the ability to articulate and communicate effectively to diverse audiences and properly translates security and risk management terminology into business terms and recommends alternative solutions to these stakeholders.

• Strong verbal and written communication skills


Assist in settling and maintaining a global strategy for cryptographic tools and devices, for both on-premises and cloud-based applications. Maintain relationship with security product vendors and partners, and follow closely product roadmaps, anticipate impacts on Mastercard infrastructure. Setup and maintain measurement processes. Review and model architectures and usage patterns for HSM consumption.


• Liaise with vendors and follow products used by Mastercard, from inception to decommission.

• Collaborate with operational teams to capture device performance information, in order to model product usage and reliability.

• Define security requirements and guidelines to ensure repeatable processes are followed by worldwide teams

• Assist in the strategy, standards, and architecture for the security aspects of key management and operation

• Provide security advice in cryptography, including several of the following: encryption, hashing, key management, digital certificates, TLS

Required Skills

• Application security (in-depth knowledge)

• Cryptography

• Security engineering

• Architecture and design

Additional Nice to Have

• Application development (hands-on experience)

• Cloud security

• Experience with PKI systems and vendors

• Experience with retail/payment HSM

Other Key Words


· PKCS#11


· Ability to perform analysis, review and design of custom systems, not just product implementation or operations.

· Ideally will have application development skills experience with HSM development and/or deployment.

Relevant Previous Experience

· Security Engineering

· Security Consultant

· Application developer/architect with security experience/focus

In the US, Mastercard is an inclusive Equal Employment Opportunity employer that considers applicants without regard to gender, gender identity, sexual orientation, race, ethnicity, disabled or veteran status, or any other characteristic protected by law. If you require accommodations or assistance to complete the online application process, please contact and identify the type of accommodation or assistance you are requesting. Do not include any medical or health information in this email. The Reasonable Accommodations team will respond to your email promptly.

Corporate Security Responsibility

All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must:

  • Abide by Mastercard’s security policies and practices;

  • Ensure the confidentiality and integrity of the information being accessed;

  • Report any suspected information security violation or breach, and

  • Complete all periodic mandatory security trainings in accordance with Mastercard’s guidelines.

Pay Ranges

O'Fallon, Missouri: $112,000 - $173,000 USD