Senior VMWare NSX 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 VMWare NSX Engineer Who is Mastercard? Mastercard is a global technology company in the payments industry. Our mission is 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. With connections across more than 210 countries and territories, we are building a sustainable world that unlocks priceless possibilities for all. Overview The Micro-Segmentation Operations team within Global Network Operations is seeking an Engineer, NSX & Microsegmentation to ensure Mastercard’s private cloud and data center network services are resilient, secure, and high-performing. This role focuses on VMware NSX-T lifecycle management and operational support, as well as Illumio-based microsegmentation for bare-metal firewalls and server workloads. You will execute in-place NSX upgrades, perform configuration changes (e.g., segments/port groups, distributed firewall rules, Tier-0/Tier-1 gateways, load balancer objects), manage platform licensing and certificates, and drive incident/problem management across production environments. The ideal candidate thrives in high-stakes operational contexts, communicates crisply, and partners across infrastructure, security, and app teams to deliver change safely and on time. Role In this position, you will: - Operate and upgrade VMware NSX-T across multiple data centers: plan/execute lifecycle activities (NSX Managers/Edges/Transport Nodes), pre-checks, impact assessments, change/rollback plans, post-validation, and documented handoffs. - Administer NSX configurations: create/modify segments & port groups (VDS/VSS), transport zones, segment profiles, DHCP profiles, T0/T1 routing, NAT, BGP/OSPF adjacencies, NSX DFW sections/policies, Groups/Tags, and (as applicable) NSX Advanced Load Balancer objects. - Support Illumio microsegmentation (bare-metal firewalls): manage PCE objects & label schemas, author and validate segmentation policies, deploy/upgrade agents (VENs) where applicable, support enforcement modes, and partner on app onboarding/runbooks. - Manage certificates for NSX Managers/Edges and related appliances: track expirations, coordinate CSRs, perform installs/rotations, and maintain inventories & workflows to eliminate certificate-related outages. - Own licensing for NSX & Illumio: monitor entitlements, forecast needs, initiate purchase requests, and ensure timely renewals and compliant deployment. - Triage and resolve incidents/problems: perform root-cause analysis across virtual networking, routing, and segmentation; maintain SLAs; create follow-up problem records with corrective actions and knowledge articles. - Open and drive vendor cases (VMware, Illumio, and OEMs): provide diagnostics, packet captures/logs, reproduce issues in lower environments, and track to closure with clear stakeholder updates. - Harden and validate security posture: maintain least-privilege DFW/Illumio policies, coordinate change windows, and support audits (e.g., PCI) with evidence, diagrams, and rule reviews. - Automate and document: use PowerCLI, Python, Ansible, or REST APIs to standardize changes and valida ... (truncated, view full listing at source)