Martín Rojo |Senior Systems Administrator & Infrastructure Engineer

Citi Group | Level 3 Wintel Systems Administrator (2015 – 2026) 

Lagniappe Pharmacy Services | Systems Administrator (2014 – 2015) 

Ennis, Inc. | MS Exchange & Systems Administrator (2004 – 2014) 

• Infrastructure & Virtualization: Managed global hypervisor estates and optimized high-availability VMware clusters using vSphere, vCenter, and ESXi.

• Enterprise Data Protection: Designed and validated multi-tenant backup policies across Veeam, Commvault, and Cohesity platforms to meet strict financial data regulations.

• Automation & Scripting: Developed advanced PowerShell scripts and Jenkins pipelines to automate configuration tasks, vulnerability patching, and system logging.

• Problem Management: Acted as L3 escalation point, leading technical war rooms and conducting deep Root Cause Analysis (RCA) for complex, client-impacting incidents.

Storage & Backup Management: Administered EMC SAN (VNX-5500/5200) arrays, executed Veeam backup upgrades, and tuned Exagrid targets under HIPAA data frameworks.

Migrations & Core Services: Headed an enterprise migration to Office 365 for over 200 users and consolidated DNS/DHCP structures across 4 Active Directory domains.

Virtual Environment Upgrades: Managed a seamless cluster upgrade from VMware 5.1 to 5.5, supporting over 100 virtual instances with minimal business disruption.

Data Availability Topologies: Engineered SAN-based and LAN-free network backup architectures to reduce data processing windows across nationwide multi-site facilities.

Messaging & Identity Infrastructure: Managed environment architecture for over 1,500 active users spanning three separate domains and two Exchange organizations.

Systems Management: Co-deployed core hardware telemetry via Nagios, established centralized group policies (GPOs), and structured the company's first tier-support framework.