Microsoft 365
Exchange Online, Teams, SharePoint, OneDrive, Microsoft 365 administration, security and compliance.
SENIOR IT INFRASTRUCTURE • MICROSOFT 365 • CLOUD • IT OPERATIONS
Building secure, reliable and scalable IT environments.
Seasoned IT professional with 27+ years of experience across IT infrastructure, operations, systems administration, cloud, cybersecurity, networking and enterprise end-user support.
27+
Years IT Experience
500+
Retail Stores Supported
3
Countries Worked
Multi-Site
Enterprise IT Operations
● Open to Senior IT Opportunities
Crisanto Mangaoang
Senior IT Infrastructure & Microsoft 365 Specialist
Microsoft 365
Azure
Entra ID
Intune
Cisco
Cybersecurity
IT Operations
ITSM
ABOUT ME
Technology leadership with hands-on infrastructure expertise.
I am a seasoned IT professional with 27+ years of experience in IT infrastructure, operations, server administration, systems administration and end-user support across the UAE, KSA and the Philippines.
My technical expertise includes Microsoft 365, Azure, Microsoft Entra ID, Intune, Windows Server, Active Directory, endpoint management, cybersecurity, network infrastructure and IT service management.
I have extensive experience leading multi-site IT operations, managing vendors, implementing technology projects, supporting business-critical applications and maintaining secure and reliable enterprise environments.
My experience also covers office relocation and infrastructure setup, server migration, Cisco networking, PABX telephone systems, CCTV, audio/video conferencing, event IT infrastructure, ERP, POS and retail technology.
I focus on delivering stable, secure and scalable technology solutions while aligning IT operations with business requirements and service objectives.
CORE EXPERTISE
Technical expertise
Azure & Entra ID
Identity and access management, authentication, device registration, cloud administration and security.
Intune & Autopilot
Endpoint management, device provisioning, enrollment, compliance, configuration and deployment.
Server & Systems
Windows Server, Active Directory, server administration, migration, backups and maintenance.
Cisco & Networking
Cisco switches, routers, firewalls, wireless networks, VPN, LAN/WAN and network troubleshooting.
Cybersecurity
Endpoint protection, antivirus, access controls, security policies, risk and compliance support.
ITSM & Automation
Jira Service Management, ITIL practices, workflows, automation and service delivery.
IT Operations
Multi-site operations, vendors, SLA management, IT projects, reporting and technology strategy.
ERP & POS
Enterprise applications, ERP, POS systems, retail technology, databases and business applications.
PABX & Telephony
PABX telephone systems, extensions, user support, troubleshooting and office telephony.
CCTV & Security Systems
IP CCTV, NVR, surveillance systems, camera deployment and security infrastructure support.
Audio / Video
Conference rooms, video conferencing, executive meetings, webinars, AV equipment and event support.
CAREER
Professional experience
Information Technology Generalist
BTCC / Markets.com
Manage IT infrastructure, Microsoft Azure, Entra ID, Intune, endpoints, networks, servers and backups. Provide L2/L3 technical support, cybersecurity, access control and compliance support. Support CRM/ERP applications, IT projects, migrations and system rollouts. Manage vendors, licensing, documentation, business continuity and disaster recovery.
Senior IT Officer
Shamal LLC
Led multi-site IT operations, infrastructure, Microsoft 365, Azure, cloud, network and security services. Administered Microsoft 365 as Global Administrator, including security, compliance and identity management. Managed ERP/POS systems, vendors, AMCs, procurement, licensing and IT assets. Implemented ITIL-based service management, cybersecurity controls, risk assessments and compliance initiatives. Provided AV/IT support for executive meetings, hybrid events, webinars and conference setups. Prepared SLA reports, KPI dashboards and IT performance reports for management.
IT Supervisor / Technical Team Leader
Robinsons Convenience Store Inc.
Provided second-line IT support across 500+ retail stores covering POS, servers, networks and end-user systems. Managed Active Directory, backups, antivirus, endpoint security and network infrastructure. Supported Cisco firewalls, switches, routers, wireless networks and store telephony systems. Supervised and mentored 150 technical support personnel and coordinated vendor escalations.
IT Supervisor
JEA Steel Industries Inc.
Managed daily IT operations, helpdesk, network infrastructure, ERP databases and Active Directory. Supported desktops, laptops, printers, switches, PABX and online timekeeping systems. Supervised IT staff and coordinated vendors for maintenance, upgrades and technical support.
Assistant Supervisor – IT Marketing Specialist
SAB Holding
Supported IT operations, technical services, systems, users and business technology requirements.
IT Sales Coordinator
Samsung Electronics Philippines / Sony Philippines Inc.
Supported technology sales coordination, customer requirements, technical products and business technology solutions.
SELECTED PROJECTS
Projects & technology initiatives
OFFICE
Office Setup & Relocation
Planned and supported complete office technology setup and relocation including network infrastructure, workstations, servers, printers, CCTV, PABX, conference rooms and user connectivity.
Infrastructure • Deployment • Relocation
SERVER
Server Migration
Planned and executed server migration activities including system preparation, data migration, application dependencies, backups, testing and post-migration support.
Servers • Migration • Business Continuity
M365
Microsoft 365 Administration
Administration and operational support across Exchange Online, Teams, SharePoint, OneDrive, security, compliance and Microsoft 365 services.
Cloud • Collaboration • Administration
AZURE
Azure & Entra ID
Managed identity and access services, authentication, device registration, security controls and cloud services.
Identity • Cloud • Security
INTUNE
Intune & Windows Autopilot
Implemented modern endpoint management covering device enrollment, provisioning, deployment, compliance and configuration.
Endpoint • MDM • Automation
CISCO
Cisco Network Infrastructure
Supported Cisco switches, routers, firewalls and wireless infrastructure including LAN/WAN connectivity, troubleshooting and network security.
Cisco • Networking • Security
ITSM
Jira Service Management
Designed service workflows, request forms and automation to improve IT support operations and reduce repetitive manual processes.
ITSM • Automation • Service Desk
LARK
Lark Collaboration Migration
Supported organizational restructuring, onboarding, collaboration workflows and transition from Microsoft Teams to Lark.
Migration • Collaboration • Change
AV
Audio / Video Conferencing
Setup and support of meeting rooms, video conferencing systems, executive meetings, webinars, hybrid meetings and presentation systems.
AV • Conferencing • Executive Support
EVENTS
IT Events Setup & Support
Planned, deployed and supported IT infrastructure for corporate events, conferences, meetings and special events, including setup, live support and dismantling.
Events • Infrastructure • Technical Support
PABX
PABX & Telephony Systems
Supported office telephone systems, extensions, user provisioning, troubleshooting and telephony infrastructure during office deployments and relocations.
Telephony • PABX • Office Infrastructure
CCTV
IP CCTV & Surveillance
Supported IP CCTV infrastructure, NVR systems, cameras, network connectivity and surveillance deployments for office and business environments.
CCTV • NVR • Security
ERP
ERP & Business Systems
Supported ERP platforms, business applications, databases, user access, troubleshooting, system rollouts and vendor coordination.
ERP • Applications • Business Systems
POS
Retail POS Infrastructure
Supported POS systems and technology infrastructure across more than 500 retail stores including servers, networks, endpoint systems and store technology.
POS • Retail • Multi-Site Support
DR
Backup, Disaster Recovery & BCP
Supported backup operations, disaster recovery planning, business continuity requirements and recovery procedures for critical IT systems.
Backup • DR • Business Continuity
ITAM
IT Asset & Vendor Management
Managed IT assets, licensing, procurement, vendors, AMC contracts, technology inventory and service provider coordination.
ITAM • Vendors • ProcurementKEY ACHIEVEMENTS
Delivering measurable IT value
01
27+ years of hands-on experience across IT infrastructure, operations and enterprise support.
02
Supported technology operations across more than 500 retail stores.
03
Led and supported multi-site IT operations across the UAE, KSA and Philippines.
04
Supervised and mentored 150 technical support personnel in a large retail environment.
05
Delivered office relocation, infrastructure deployment, server migration and technology implementation projects.
06
Supported Microsoft 365, Azure, Entra ID, Intune, Cisco networking and cybersecurity.
07
Supported corporate events, executive meetings, webinars and audio/video conferencing.
08
Managed vendors, IT assets, licensing, AMCs, SLA reporting and technology projects.
CERTIFICATIONS & TRAINING
Professional qualifications
CompTIA+
IT infrastructure, troubleshooting and technical support fundamentals.
CCNA
Cisco networking, routing, switching and network fundamentals.
Information Systems
Certificate in Information Systems with technical systems background.
Visual Basic
Specialized training and experience in Visual Basic programming.
LANGUAGES
Communication
01
English
Advanced
02
Tagalog
Native
03
Arabic
Conversational
04
Hindi
Conversational
LET'S CONNECT
Looking for an experienced IT professional?
I am open to opportunities in Senior IT Infrastructure, Senior IT Administration, IT Infrastructure Management and IT Operations Management.
For opportunities involving Microsoft 365, Azure, endpoint management, infrastructure, cybersecurity, networking or enterprise IT operations, feel free to get in touch.