Summary
Overview
Work History
Education
Skills
Certification
Languages
Honors and Awards
Timeline
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Sherwin Navarra

Markham,Canada

Summary

Experienced IT professional with over 10 years of hands-on work in desktop support, systems administration, and cloud infrastructure across Linux and Windows environments. Skilled in configuring and maintaining servers, workstations, and enterprise software, with strong experience in troubleshooting technical issues related to email, printers, operating systems, and business applications. Familiar with Cisco environments and IP networking, with a proven ability to support hybrid infrastructures. Committed to delivering excellent customer service and clear communication while working independently or as part of a cross-functional team.

Overview

10
10
years of professional experience
1
1
Certification

Work History

System Administrator (Cloud / On-premises)

NCS PTE LTD
Singapore, Singapore
01.2017 - 11.2022
  • Deployed, configured, and maintained both on-premises and cloud-based infrastructure solutions, supporting the implementation of designs and configurations developed by the team.
  • Managed and configured Windows Server and Linux Server operating systems, including Active Directory, Microsoft Office 365, MS SQL, and related applications.
  • Administered Azure Active Directory and IAM, handling user provisioning, role assignments, access policies, and applying Multi-Factor Authentication (MFA) for enhanced security.
  • Ensured infrastructure security by enforcing policies for data integrity, user access control, and compliance with internal security standards.
  • Automated routine tasks and system management activities using PowerShell, Bash.
  • Deployed and applied OS and security patches using WSUS and HP Server Automation Manager for on-premises, and Azure Update Manager and AWS Systems Manager Patch Manager for cloud environments.
  • Proactively monitored system performance, availability, and infrastructure health, responding to incidents, outages, and system failures.
  • Executed service continuity measures such as backup and restore procedures to safeguard critical data and maintain uptime.
  • Worked with security teams to apply VAPT fixes to vulnerabilities, maintaining system security and ensuring alignment with best practices.
  • Provided Level 1 and Level 2 technical support, troubleshooting and resolving user issues related to servers, data, and applications.
  • Collaborated with network teams for monthly firewall reviews, ensuring optimal security and compliance with network policies.
  • Prepared and maintained comprehensive technical documentation, including standards, policies, and system configurations.
  • Worked with third-party vendors for hardware repairs and replacements, ensuring minimal downtime and system disruption.
  • Client: GovTech
  • Simplified troubleshooting processes by creating detailed documentation for system configurations, procedures, and best practices.
  • Provisioned new software and hardware for use, following established security policies.
  • Managed user access rights to maintain a high level of information security while ensuring appropriate levels of accessibility for authorized personnel.
  • Supported the implementation of new technologies by providing technical expertise and training to colleagues as needed.
  • Managed onboarding and offboarding of employees.
  • Collaborated with IT team to develop and implement comprehensive disaster recovery plans, ensuring minimal data loss during critical incidents.
  • Installed important security and functionality patches to maintain optimal protections against intrusion and system reliability.
  • Enabled smooth transitions during hardware and software upgrades, minimizing disruptions to end users.
  • Diagnosed and resolved complex technical issues through in-depth analysis, facilitating uninterrupted business operations.
  • Completed reports detailing network and systems performance and downtime issues.
  • Reduced downtime by proactively identifying and resolving potential issues through thorough system monitoring.
  • Enhanced system performance by optimizing server configurations and implementing regular updates.
  • Improved security measures by conducting vulnerability assessments and applying necessary patches.
  • Planned and implemented upgrades to system hardware and software.
  • Resolved issues and escalated problems with knowledgeable support and quality service.
  • Installed and configured network printers and other peripheral devices.
  • Enhanced team efficiency, automating routine administrative tasks to allow focus on strategic initiatives.
  • Reduced system vulnerabilities, implementing comprehensive security protocol including regular audits and employee training.
  • Improved operational efficiency, leveraging cloud technologies for scalable and cost-effective infrastructure solutions.
  • Maintained flexible schedule and responded to after-hours and weekend emergencies.
  • Monitored networks and network devices to resolve technical problems quickly.

Datacenter Operator

NCS PTE LTD
Singapore, Singapore
01.2015 - 12.2016
  • Managed the operation and maintenance of hardware and infrastructure in data centers, ensuring high availability, resilience, and rapid recovery from hardware failures.
  • Provided Level 1 system administration, management, and troubleshooting.
  • Responded to incidents, investigated root causes, and implemented resolutions to minimize downtime.
  • Granted site access to vendors and third parties, escorting them as needed, and ensuring compliance with data center standards and security protocols.
  • Ensure that real-time and batch processes run smoothly and are finished within the planned time.
  • Performed data backup and tape operations, ensuring the integrity and security of critical data.
  • Conducted physical server checks to ensure hardware functionality, proper connections, and system performance.
  • Performed 24/7 monitoring of the entire data center environment, ensuring continuous system availability and prompt response to potential issues.
  • Client: GovTech
  • System Specialist
  • Mitigated risk of data loss, conducting timely backups and disaster recovery exercises.
  • Supported new system deployments by installing and configuring servers, storage devices, and networking equipment.
  • Ensured continuous uptime for critical systems through routine equipment checks and proactive maintenance.
  • Reduced downtime during maintenance periods by implementing efficient change management procedures.
  • Participated in audits and compliance reviews, implementing corrective actions as needed to ensure adherence to regulatory requirements.
  • Resolved processing errors interfering with service-level goals for uptime and data integrity.
  • Improved data center efficiency by monitoring and maintaining optimal environmental conditions.
  • Collaborated with cross-functional teams to troubleshoot complex problems, ensuring seamless operations in the data center.

System Specialist

NCS PTE LTD
Singapore, Singapore
11.2012 - 12.2014
  • Delivered first-level and Tier 2 technical support for end users, troubleshooting and resolving hardware, software, and network issues on desktops, laptops, and mobile devices.
  • Managed Active Directory (AD), handling user access and permissions to maintain a secure system environment and ensure compliance with organizational policies.
  • Supported WSUS server configuration and patch management, ensuring systems were up to date with security patches and operating system updates.
  • Diagnosed, repaired, and maintained various IT hardware, including PCS, printers, and network devices, minimizing downtime and improving user productivity.
  • Assisted in deploying and rolling out IT systems, helping onboard new employees and teams with proper hardware/software provisioning.
  • Coordinated with third-party vendors for hardware repairs, warranty claims, and other necessary replacements, ensuring minimal service disruption.
  • Implemented ITIL processes in day-to-day operations, ensuring standardized and efficient management of incidents, service requests, and user support.
  • Developed and maintained technical documentation, creating troubleshooting guides to ensure efficient support.
  • Conducted end-user training on system usage, best practices, and IT troubleshooting to promote self-sufficiency.
  • Client: ihis – Integrated Health Information Systems
  • Desktop Support

Education

Diploma - Business Information Technology -

Seneca Polytechnic
Toronto, ON
08.2024

BS - Computer Science

Adamson University
Manila Philippines
03.1998

Skills

  • Cloud Platforms & Services: AWS, Azure, GCP
  • Virtualization: Microsoft Hyper-V, VMWare ESXi/V-Center/vSphere, VMWare Workstation, Citrix
  • Operating Systems: Windows Server 2016/2019, Linux (RHEL, Ubuntu, Centos, Kali), Windows 10/11, MAC OS
  • Database Management: MSSQL, Mysql
  • Scripting & Automation: PowerShell, Bash Script, Python
  • Web Servers & Security: SSL/TLS, NGINX, Apache
  • Hardware: HP, Dell, Lenovo, Macintosh
  • Network & Security: LAN/WAN, Wi-Fi, Cisco Routers/Switches, McAfee/Symantec Endpoint Anti-Virus
  • Mobile Device Management (MDM): Microsoft Intune
  • Tools & Software: Git/GitHub, ServiceNow ITSM, BMC Remedy, Jira, HP Server Automation Manager (HPSA), HP Data Protector Software, Microsoft 365, Office 365, Acronis Backup, SolarWinds, Nagios, Terraform, Docker, Docker Hub, Adobe Photoshop, WordPress
  • Administration & Support: System administration, network monitoring & troubleshooting, desktop application support, Remote Desktop Services support, incident management, change management, user account management, Active Directory management, DNS/DHCP/Group Policy, scripting, email support, complex problem-solving, equipment inventory
  • System upgrades
  • System monitoring
  • Technical support
  • System updates
  • Remote Access
  • Windows administration
  • Software installation
  • Server management
  • Network troubleshooting
  • Hardware and software installation
  • User management
  • Desktop troubleshooting
  • Disaster recovery
  • Helpdesk operations
  • File system administration
  • IT documentation
  • Server maintenance
  • Hardware troubleshooting
  • Patch management
  • Network administration
  • Virtualization
  • Backup management
  • Device configuration
  • Incident management
  • End point configurations
  • Mobile device management
  • Nagios monitoring software
  • Offboarding and onboarding
  • Virtualization technologies
  • Scripting languages
  • Server improvements
  • Linux administration
  • Active directory
  • Hardware expertise
  • Technical troubleshooting
  • User support
  • Hardware installation
  • Network security
  • Data backup
  • PC diagnostics
  • Cloud management
  • IP addressing and subnetting
  • LAN and WAN control
  • VMware and Oracle VM
  • Attention to detail
  • Virtual machine operation
  • Remote conferencing support
  • Connectivity resolution
  • Team collaboration
  • Application configuration
  • Servers expertise
  • Technical analysis
  • Permissions and Access control
  • VoIP systems
  • Analytical and methodical
  • Storage management
  • Diagnosing issues
  • New program installations
  • Performance tuning
  • Email administration
  • Hardware provision management
  • Help desk software

Certification

  • Microsoft Azure Administrator Associate (2020)
  • Microsoft Azure Security Engineer-Associate (2021)
  • Microsoft Certified: Azure Network Engineer Associate (2022)
  • AWS SysOps Administrator Associate (2020)
  • Certified in Cybersecurity (ISC2) (2024)
  • MCSA: Windows Server 2012 (2016)
  • Microsoft Certified Professional (2016)
  • ITIL V3 Foundation (2014)

Languages

English
Full Professional

Honors and Awards

Academic Honors

Seneca Polytechnic

Toronto, Ontario | August 2024

NCS Spot Award

NCS PTE LTD (GovTech)

Singapore | October 2021

Awarded to top-performing employees based on outstanding contributions and customer feedback.

Best Engineer Award

NCS PTE LTD (Khoo Teck Puat Hospital/Yishun Community Hospital)

Singapore | December 2014

Recognized for exceptional engineering performance, including the highest number of customer commendations among the engineering team.

Best Engineer Award

NCS PTE LTD (Khoo Teck Puat Hospital)

Singapore | July 2014

Recognized for outstanding customer service, with notable client satisfaction resulting from tailored support and effective solutions.

Timeline

System Administrator (Cloud / On-premises)

NCS PTE LTD
01.2017 - 11.2022

Datacenter Operator

NCS PTE LTD
01.2015 - 12.2016

System Specialist

NCS PTE LTD
11.2012 - 12.2014

Diploma - Business Information Technology -

Seneca Polytechnic

BS - Computer Science

Adamson University

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Sherwin Navarra