Paul Krzywicki

Senior Windows / Infrastructure Engineer with nearly 20 years of progressive IT experience supporting enterprise infrastructure for a global credit card processing organization. Extensive hands-on experience supporting approximately 500 virtual machines across 15 VMware clusters and multiple domestic and international data centers. Proven experience leading infrastructure modernization initiatives, including migrating mission-critical transaction-processing platforms from physical servers to VMware, large-scale Windows Server upgrades, infrastructure deployments, production incident response, and disaster recovery testing.

Experienced with PCI-DSS compliance, Windows security configuration, change management, and 24/7 on-call support since 2008.

Windows Systems Engineer - GLOBAL PAYMENTS / EVO PAYMENTS

(2015-05 - 2026-08)

• Supported approximately 500 virtual machines across 15 VMware clusters (3–8 hosts each) in multiple domestic and international data centers; administered vSphere/ESXi 6, 7, and 8, including HA, DRS, and vMotion.
• Provisioned new virtual infrastructure to migrate a mission-critical transaction-processing platform from approximately 12 physical servers to VMware, including new SQL Server database clusters, IIS servers, and application installation and configuration.
• Led multiple large-scale OS modernization projects involving hundreds of servers and VMs, using in-place upgrades, new server builds, application cutovers, P2V migrations, and legacy decommissioning across Windows Server 2003 through 2025.
• Built VMware clusters from the ground up; performed Dell EMC vXrail and associated vCenter upgrades; maintained VM templates and patching for new deployments.
• Built Windows and virtualization infrastructure for 2–6 node SQL Server failover clusters, then transitioned completed clusters to SQL Database Administrators.
• Coordinated planned production downtime with application owners and management through formal change control, addressing infrastructure and application dependencies before implementation.
• Built and maintained domain controllers across 20+ Active Directory domains; administered Active Directory, DNS, DHCP, and Group Policy enterprise-wide.
• Managed VM backups and replication with Veeam Backup & Replication, performed DR failovers, and conducted annual disaster recovery testing for each supported system.
• Resolved critical production incidents affecting customer-facing credit card transaction-processing systems in a high-availability environment; on call 24/7 continuously since 2008.
• Used IIS Crypto to configure Windows Server protocols, cipher suites, and hashing algorithms for security and compliance; installed and configured IIS for application deployments.
• Supported PCI-DSS compliance initiatives and security audits, providing technical information, documentation, and infrastructure support.
• Owned and supported Metalogix Archive Manager for Exchange; supported Microsoft Exchange and SQL Server environments.
• Performed hands-on ESXi host maintenance (HDD and RAM replacement) and worked closely with application and network engineering teams on projects, upgrades, and troubleshooting.
• Used PowerShell for administration and troubleshooting; utilized Splunk, Tripwire, and Symantec Endpoint Protection for monitoring and security.

Systems Administrator - GLOBAL PAYMENTS / EVO PAYMENTS

(2011-05 - 2015-05)

• Administered Windows Server, Active Directory, DNS, DHCP, and Group Policy supporting enterprise production environments, and participated in infrastructure upgrades, migrations, and production support.
• Served as the primary local desktop and end-user support resource for an office of approximately 30–50 employees.
• Performed hands-on data center support, including server deployments, OS installations, hardware replacement, cabling, and physical troubleshooting.

NOC Supervisor - GLOBAL PAYMENTS / EVO PAYMENTS

(2007-12 - 2011-05)

• Supervised Network Operations Center activities in a 24/7 enterprise environment, coordinating monitoring, incident escalation, and operational response with technical teams.
• Served as the primary local desktop support and helpdesk resource for approximately 30 employees.
• Continued hands-on data center support, including server deployments, OS installations, network cabling, and hardware replacements.

NOC Operator - GLOBAL PAYMENTS / EVO PAYMENTS

(2006-12 - 2007-12)

• Monitored enterprise systems and network operations in a 24/7 environment; identified, documented, and escalated infrastructure and production incidents.
• Served as the primary desktop support and helpdesk resource for approximately 20 employees.
• Provided hands-on data center support, including racking and cabling servers, connecting LAN infrastructure to switches and patch panels, OS installations, and replacing hardware such as HDDs and RAM.

Father Judge High School Philadelphia, PA