Diego Villanueva Segovia
Lewisburg,TN
Summary
Experienced in VMware ESXi, vSphere management, and PowerCLI scripting, with a strong track record of delivering optimized application performance and creating robust technical documentation. Proficient in managing and troubleshooting Nutanix Hyperconverged Infrastructure (HCI), including AHV and Prism Central, enhancing infrastructure scalability and resilience.
Overview
8
8
years of professional experience
1
1
Certification
Work History
Senior Application Engineer
HCA
Nashville, Tennessee
02.2025 - Current
- Collaborated with cross-functional teams to gather requirements and develop specifications.
- Implemented automated testing frameworks to enhance software quality assurance processes.
- Troubleshot complex application issues, providing timely resolutions to stakeholders.
- Documented technical specifications and user guides for end-users and support teams.
- Analyzed system specifications, input and output processes, and workflow diagrams to identify application issues.
- Deployed new versions of applications into production environments following established change control procedures.
- Monitored application performance metrics to assess stability, scalability, availability, throughput, latency.
- Built automated testing scripts to validate application functionality prior to deployment.
- Optimized database queries for improved performance efficiency.
- Evaluated and led root-cause analysis for production issues and system failures.
- Prepared detailed workflow charts and diagrams to describe input, output and logical operations.
Windows Senior Systems Administrator
Community Health Systems, CHS
Brentwood, Tennessee
01.2024 - 02.2025
- Upgraded existing hardware to ensure compatibility with new versions of VMware products.
- Provided technical expertise in the installation, configuration and maintenance of VMware ESXi and vSphere environments.
- Created and maintained virtual machines using vCenter Server.
- Resolved issues related to networking, storage, security, and other infrastructure components within a VMware environment.
- Performed daily system monitoring to ensure optimal performance of all virtualized systems.
- Configured VLANs for secure communication between physical networks and virtual machines.
- Collaborated closely with IT teams from other departments to ensure smooth operations of all virtualized systems.
- Monitored resource utilization to identify potential performance bottlenecks or capacity constraints.
- Managed multiple vCenters with high availability clusters including host, storage and network components.
- Optimized performance by tuning parameters such as memory allocation, CPU affinity settings.
- Assisted in troubleshooting problems related to operating systems or application software running on virtual machines.
- Utilized PowerCLI scripting language to automate administrative tasks across multiple vCenters.
- Provided technical support and training to users, improving system understanding and reducing support requests.
System Administrator
Community Health Systems, CHS
Brentwood, Tennessee
08.2020 - 12.2023
- Monitored system performance using monitoring tools and troubleshooting issues promptly.
- Implemented backup solutions to safeguard critical data against loss.
- Documented system configurations and procedures for future reference.
- Configured and maintained system hardware, software and network components.
- Maintained website security by installing SSL certificates and monitoring server logs.
- Integrated security measures such as SSL certificates into web applications.
- Configured virtual machines to meet project requirements and specifications.
- Monitored system health and resolved performance issues proactively.
- Collaborated with teams to deploy new applications on virtual platforms.
- Implemented group policies to enhance security and streamline user access.
- Provided technical support for Active Directory-related issues to staff.
- Assisted in troubleshooting network connectivity issues related to DNS, DHCP and TCP and IP configuration.
Senior Service Desk Analyst
Community Health Systems
Brentwood, Tennessee
07.2019 - 08.2020
- Provided technical support to users via phone and email communication.
- Troubleshot hardware and software issues for desktop and laptop systems.
- Assisted in onboarding new employees with IT setup and training.
- Documented service requests and resolutions in ticketing system.
- Educated users on software applications and best practices for security.
- Responded promptly to emergency situations requiring immediate attention.
- Maintained user accounts by creating, deleting or modifying as needed.
- Created detailed documentation for all processes used in providing IT services.
- Analyzed root cause of incidents using problem management tools such as ITSM.
- Resolved escalated service requests in a timely manner.
- Trained junior staff members on best practices for resolving customer inquiries.
- Provided technical support for hardware, software and network issues to end-users via phone, email and remote access.
- Ensured compliance with SLAs through regular audits.
- Performed troubleshooting on operating systems, hardware components and network connections.
Service Desk Representative
Community Health Systems
Brentwood, Tennessee
08.2017 - 07.2018
- Provided technical support for hardware and software issues to users.
- Documented user interactions and resolutions in the ticketing system.
- Collaborated with team members to improve service desk processes.
- Responded to customer inquiries via phone and email promptly.
- Maintained knowledge base articles for common user issues regularly.
- Escalated unresolved issues to senior technicians for further assistance.
- Uninstalled and reinstalled basic software applications, resolved username problems, verified proper hardware and software setup, resolved network connectivity issues and corrected email irregularities.
- Routed, tracked and managed client's service desk tickets from inception to close and documented issues and results.
- Documented solutions and troubleshooting steps concisely in ticketing system and alerted other team members of new service solutions.
- Analyzed and resolved IT problems to achieve complete resolution for customers with minimal productivity loss.
Education
Information Technology And Infrastructure Management - Information Technology
Tennessee College of Applied Technology
ShelbyvilleSkills
- VMware ESXi
- vSphere management
- PowerCLI scripting
- Virtual machine configuration
- Systems monitoring
- Technical documentation
- Application deployment
- Change management
- Problem solving
- Effective communication
- Root cause analysis
- VMware vSphere administration
- High availability configuration
- VMware powercli scripting
- Prism Central
- AHV
- AOS
- Prism Element
Certification
- Nutanix NCA
- Nutanix NCP-MCI
Timeline
Senior Application Engineer
HCA
02.2025 - Current
Windows Senior Systems Administrator
Community Health Systems, CHS
01.2024 - 02.2025
System Administrator
Community Health Systems, CHS
08.2020 - 12.2023
Senior Service Desk Analyst
Community Health Systems
07.2019 - 08.2020
Service Desk Representative
Community Health Systems
08.2017 - 07.2018
Information Technology And Infrastructure Management - Information Technology
Tennessee College of Applied Technology