WERNER FERNANDO OROXON RAMIREZ
Systems Administrator
Quetzaltenango
Summary
Senior systems administrator with more than 25 years of experience supporting business-critical infrastructure, remote users, virtual environments, identity services, and regulated customer accounts. Recent hands-on experience includes Microsoft Entra ID sign-in monitoring, investigation of suspicious access attempts, and ProofPoint email-security support. Career background spans electronic banking and ATM networks, enterprise infrastructure at Xerox and Atos, Windows Server from NT 4.0 through 2022, VMware vSphere/ESXi 5.5 through 8, Active Directory security assessments with ORADAD, and operational controls informed by GxP, HIPAA, GDPR, and IT service-management practices
Overview
27
27
years of professional experience
Work History
Systems Administrator
Alliance Technologies, LLC
01.2026 - 06.2026
- Administered Microsoft Entra ID for user identities, authentication, access troubleshooting, and account-related support in a cloud-based environment for more than 15 different tenants
- Reviewed sign-in activity and security alerts to identify suspicious access attempts and possible account compromise, escalating or supporting remediation when required
- Used ProofPoint to investigate quarantined messages, review suspected phishing or malicious email, and resolve delivery and filtering issues for remote users
- Provided remote support for identity, access, authentication, and cloud-service incidents while documenting findings and corrective actions
- Led troubleshooting efforts for hardware and software issues, minimizing downtime for users.
Infrastructure Management Senior Analyst / Wintel Engineer
Atos (formerly Xerox ITO)
10.2012 - 12.2025
- Supported multiple enterprise customer environments for more than 10 years, administering Windows and virtual servers through incidents, service requests, planned changes, patching, access issues, and infrastructure maintenance
- Operated VMware vCenter and ESXi across versions 5.5 through 8, supporting virtual machine lifecycle tasks, troubleshooting, upgrades, capacity reviews, and production-readiness activities
- Administered Active Directory services across Windows Server generations from NT 4.0 through 2022, including users, groups, permissions, Group Policy, DNS, certificate services, and secure remote administration
- Used ORADAD findings to identify Active Directory weaknesses, prioritize remediation, and help customer environments move closer to required security baselines
- Applied controls from four major compliance areas-GxP, HIPAA, GDPR, and data integrity-when administering systems that could contain sensitive or regulated information
- Coordinated in English and Spanish with users, service teams, vendors, and customer contacts, producing implementation plans, validation evidence, operational notes, and support documentation
- Provided remote Windows administration for multiple customer environments, including monitoring, patching, troubleshooting, access support, performance analysis, and routine maintenance
- Supported virtual servers and business-critical applications under formal incident and change-management processes, using proactive health checks, timely escalation, and documented recovery actions to protect service continuity
- Guatemala / Remote support for international clients
- Led cross-functional teams to implement process improvements, enhancing operational efficiency.
- Conducted risk assessments and proposed solutions to mitigate potential operational challenges.
- Streamlined reporting processes, reducing turnaround time for key deliverables significantly.
QA Analyst, Systems Administrator, Programmer and Help Desk Lead
Transacciones y Transferencias, S.A. (TyT / 5B Network)
Guatemala
02.2006 - 10.2012
- Supported the integration of two national ATM networks-Bancared and 5B-and performed quality assurance for changes before release to production transaction systems
- Managed development and test servers for application teams and coordinated controlled validation of releases, interfaces, and infrastructure changes
- Planned and executed migration testing for five financial institutions and certified new ATM models for production use
- Implemented Siebel CRM and developed a call-center application used for card blocking and customer assistance
- Designed and deployed server infrastructure for a .NET-based ATM monitoring solution and coordinated Help Desk workload and critical-incident response
- Optimized user experience by conducting usability tests and providing actionable feedback to development team.
- Spearheaded adoption of cutting-edge testing software, keeping company at forefront of QA technology.
- Reduced number of customer-reported issues by establishing preemptive testing strategy that targeted common failure points.
- Improved product reliability with rigorous regression testing, ensuring software performance consistency across updates.
- Fostered culture of continuous improvement by regularly reviewing and updating QA methodologies to adapt to new challenges.
- Developed and maintained comprehensive documentation, including test cases, results, and improvement recommendations, for stakeholder review.
- Facilitated transition to Agile methodologies, enhancing team flexibility and project turnaround times.
- Streamlined QA processes, significantly reducing testing cycle time by implementing automated testing tools.
- Pioneered integration of performance testing in development cycle, significantly improving product scalability and endurance.
- Enhanced software quality by meticulously executing detailed test plans and identifying critical bugs before product releases.
- Enhanced team collaboration, sharing best practices and insights that led to refinement of testing protocols.
- Customized testing environments to simulate real-world usage scenarios, ensuring product robustness and customer satisfaction.
- Identified and documented discrepancies between expected and actual outcomes, contributing to overall software quality improvement.
- Collaborated closely with development teams to clarify requirements, resulting in more efficient bug resolution process.
- Collaborated with cross-functional teams to identify and resolve defects in applications.
- Conducted root cause analysis for defects, leading to enhanced product reliability.
Programmer Analyst / Technical Support Lead
Bancared
Guatemala
01.1999 - 01.2006
- Developed and supported applications for electronic banking, ATM transactions monitoring, and financial network operations over a seven-year tenure
- Evaluated and integrated new technologies, supported production incidents, and participated in on-call coverage for critical transaction services
- Led internal Help Desk operations by assigning workload, coordinating with internal users for about 100 users and 5 client financial institutions, and following incidents through resolution
Education
Bachelor's Degree - Information Technology
Universidad Galileo
Skills
Cloud and user support
Remote troubleshooting
Onboarding/offboarding
Account access
Permissions
User communication
Vendor coordination
Microsoft infrastructure
Windows Server NT 40-2022
Active Directory
Microsoft Entra ID
Group Policy
Timeline
Systems Administrator
Alliance Technologies, LLC
01.2026 - 06.2026
Infrastructure Management Senior Analyst / Wintel Engineer
Atos (formerly Xerox ITO)
10.2012 - 12.2025
QA Analyst, Systems Administrator, Programmer and Help Desk Lead
Transacciones y Transferencias, S.A. (TyT / 5B Network)
02.2006 - 10.2012
Programmer Analyst / Technical Support Lead
Bancared
01.1999 - 01.2006
Bachelor's Degree - Information Technology
Universidad Galileo