PKI Senior Security Engineer

United States, Georgia, AtlantaInformation Technology 01-Jun-2026Ref #: 32759How you'll help us Keep Climbing (overview & key responsibilities)At Delta Air Lines, connection is at the heart of everything we do and guides our every action. We strive to welcome and care for all of our customers during their travels with us and aim to deliver an elevated experience.Delta is focused on sustaining a strong IT operation, growing our capabilities, and maximizing optimization across each of our tech hubs to elevate the travel experience for our customers and empower our 90,000 Delta people. We’re committed to fostering innovation, and we’re excited to invite you to be part of our journey as we shape the future of technology at the world’s best airline!The PKI Engineer is responsible for designing, operating, and enhancing the enterprise Public Key Infrastructure (PKI) and certificate management services. This role ensures secure authentication, encryption, and certificate lifecycle management across enterprise systems, supporting regulatory compliance and operational stability.This position plays a critical role in scaling PKI services, driving automation, and reducing operational risk associated with certificate expiration, trust store management, and cryptographic operations.YOUR RESPONSIBILITIES IN THIS ROLE:1. PKI Infrastructure & OperationsMaintain and operate PKI platforms, including Certificate Authorities (CAs), HSMs, and certificate management systemsEnsure availability, resiliency, and patching of PKI infrastructureSupport certificate issuance, renewal, revocation, and lifecycle management2. Certificate Lifecycle ManagementManage large-scale certificate environments across applications and infrastructureEnsure timely renewal and replacement of certificatesSupport trust store management and certificate chain integrity3. Automation & IntegrationBuild and implement automation for certificate lifecycle managementIntegrate PKI services with enterprise platforms (CI/CD pipelines, cloud services, applications)Deploy and operationalize tools such as connectors and automation pipelines4. Governance, Standards & Policy EnforcementEnforce security policies related to certificate usage and cryptographyDefine and maintain standards for certificate issuance, validity, and usageSupport compliance with regulatory frameworks (e.g., NIST, CMMC, PCI, TSA directives)5. Cross-Team CollaborationPartner with application and infrastructure teams to enable certificate automationProvide guidance and supporting tooling while ensuring clear ownership boundariesAssist teams with onboarding to PKI services and automation6. Risk Reduction & Incident SupportIdentify and remediate risks related to certificate expiration, misconfiguration, or trust failuresSupport incident response involving certificate or encryption issuesImprove visibility and reporting for certificate health and compliance7. Emerging Crypto & Future ReadinessSupport adoption of new cryptographic standards (e.g., post-quantum cryptography)Assist in modernization of PKI architecture and toolingEvaluate new solutions for scalability and resilienceBenefits and Perks to Help You Keep ClimbingOur culture is rooted in a shared dedication to living our values – Care, Integrity, Resilience and Servant Leadership – every day, in everything we do. At Delta, our people are our success. At the heart of what we offer is our focus on Sharing Success with Delta employees. Exploring a career at Delta gives you a chance to see the world while earning great compensation and benefits to help you keep climbing along the way:Competitive salary, industry-leading profit sharing program, and performance incentives401(k) with generous company contributions up to 9%New hires are eligible for up to 2-weeks of vacation. This is earned for use in the following vacation year (April 1 – March 31)In addition to vacation, new hires are eligible for up to 56 hours of paid personal time within a 12-month period10 paid holidays per calendar yearBirthing parents are eligible for 12-weeks of paid maternity/parental leaveNon-birthing parents are eligible for 2-weeks of paid parental leaveComprehensive health benefits including medical, dental, vision, short/long term disability and life insurance benefitsFamily care assistance through fertility support, surrogacy and adoption assistance, lactation support, subsidized back-up care, and programs that help with loved ones in all stagesHolistic Wellbeing programs to support physical, emotional, social, and financial health, including access to an employee assistance program offering support for you and anyone in your household, free financial coaching, and extensive resources supporting mental healthDomestic and International space-available flight privileges for employees and eligible family membersCareer development programs to achieve your long-term career goalsWorld-wide partnerships to engage in community service and innovative goals created to focus on sustainability and reducing our carbon footprintBusiness Resource Groups created to connect employees with common interests to promote inclusion, provide perspective and help implement strategiesRecognition rewards and awards through the platform Unstoppable TogetherAccess to over 500 discounts, specialty savings and voluntary benefits through Deltaperks such as car and hotel rentals and auto, home, and pet insurance, legal services, and childcareWhat you need to succeed (minimum qualifications)Bachelor’s degree in Computer Science, Cybersecurity, or related field (or equivalent experience)3–7+ years in PKI, cybersecurity engineering, or infrastructure securityHands-on experience with certificate lifecycle managementExperience with PKI tools/platforms (e.g., Venafi, DigiCert, Microsoft CA, AWS ACM)Understanding of TLS/SSL, cryptographic principles, and key managementConsistently prioritizes safety and security of self, others, and personal data. Embraces diverse people, thinking, and styles. Possesses a high school diploma, GED, or high school equivalency. Is at least 18 years of age and has authorization to work in the United States.What will give you a competitive edge (preferred qualifications)Experience with: HSMs and key custody operationsPKI automation (APIs, pipelines, scripting)Cloud certificate services (AWS, Azure)Knowledge of compliance frameworks (NIST, PCI-DSS, CMMC) Experience scaling PKI in large enterprise environments Familiarity with trust store management across distributed systems< Go back