Dhennis Tolentino
Buena Park,CA
Summary
Technical Services Engineer with 10+ years of experience supporting cloud infrastructure, network systems, server environments, and end-user operations. Skilled in Microsoft Azure, on-premises to cloud migrations, virtualization, backup and disaster recovery, email migrations, and Tier I-III technical support. Proven record of improving system stability, reducing downtime, strengthening security, and delivering cost-effective infrastructure solutions across client and enterprise environments.
Overview
13
13
years of professional experience
Work History
Technical Services Engineer
Xperts Unlimited, Inc
Los Angeles, CA
11.2016 - Current
- Support Tier I, II, and III technical issues across client server, network, cloud, and end-user environments, reducing downtime and improving service continuity.
- Designed, implemented, and administered Microsoft Intune for endpoint provisioning, mobile device management, policy enforcement, device compliance, application deployment, and secure access management across client environments.
- Utilize NinjaRMM and Datto RMM to perform remote monitoring, patch management, endpoint maintenance, and proactive issue resolution across client environments
- Design and implement Microsoft Azure IaaS solutions for client environments, aligning infrastructure with security, scalability, and business requirements.
- Lead on-premises to cloud migration projects, including lift-and-shift transitions that reduce infrastructure overhead and improve operational flexibility.
- Administer and monitor client cloud platforms to maintain security, stability, backup integrity, and performance.
- Manage Datto and DropSuite backup and disaster recovery solutions to protect critical business systems and data.
- Execute client email migration projects using BitTitan, minimizing disruption to users and business operations.
- Administer user accounts, directory services, domains, and access permissions in accordance with company policy and security standards.
- Support Nextiva and Dialpad cloud communication platforms for business telephony and user connectivity.
- Manage virtual server infrastructure using Hyper-V and VMware vSphere 5.5/6.0/6.5 across Windows Server 2003, 2008, 2012, 2016, and 2019 environments.
- Maintain technical documentation, configuration records, and support procedures using IT Glue.
- Recommend preventative infrastructure improvements to strengthen system reliability, data integrity, and long-term uptime.
- Diagnosed technical issues and provided effective solutions for client systems.
- Developed strong relationships with key accounts through consistent high-quality service delivery.
Network Technician II
AltaMed Health Services
Los Angeles, CA
06.2013 - 11.2016
- Served as lead contact for escalated technical issues and outage-related operational tickets in a healthcare environment supporting 2,400+ end users.
- Troubleshoot and resolved network connectivity issues, server outages, application failures, and security incidents within established SLA targets.
- Improved wireless infrastructure by supporting HP ProCurve access layer switches, wireless LAN operations, and access point validation.
- Helped maintain 96% wireless network uptime through proactive troubleshooting and infrastructure support.
- Tracked, documented, and monitored service issues through the Track-It ticketing system.
- Applied IT security controls and supported McAfee antivirus deployment and data security compliance initiatives.
Education
Associate of Arts - System, Networking, and LAN/WAN Management/Manager
DeVry University
Ontario, CA03-2023
Bachelor's Degree - Network and Communications Management
DeVry University
Long Beach, CA06-2015
NCO - Leadership and Supervisory Preparatory, Organizational Leadership
Community College of The Air Force
Okinawa, Japan08-2004
Skills
- Microsoft Azure
- Azure IaaS
- Cloud Infrastructure
- Lift-and-Shift Migration
- Windows 11
- Windows Server Administration
- Active Directory
- VMware vSphere
- Hyper-V
- Network Troubleshooting
- Backup and Disaster Recovery
- Datto
- BitTitan
- IT Glue
- Technical Support
- Tier I, II, and III Support
- Infrastructure Support
- VoIP and Cloud Communications
Timeline
Technical Services Engineer
Xperts Unlimited, Inc
11.2016 - Current
Network Technician II
AltaMed Health Services
06.2013 - 11.2016
Associate of Arts - System, Networking, and LAN/WAN Management/Manager
DeVry University
Bachelor's Degree - Network and Communications Management
DeVry University
NCO - Leadership and Supervisory Preparatory, Organizational Leadership
Community College of The Air Force