Larry Bert Mahumot

Larry Bert G. Mahumot

ISP Network Engineer | Consultant

NCII | CSS | CCNA | AZ-104 | CLF-C01
Cloud | Routing & Switching Enthusiast

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Professional Summary

Network Engineer with 13+ years of experience in IT Network Administration, NOC Operations, Network Engineering, and ISP Infrastructure. Skilled in MikroTik RouterOS, IPv4/IPv6 eBGP/iBGP, ISP/IX peering, routing, switching, BGP, firewalls, security, load balancing, and network optimization. Experienced in designing, implementing, monitoring, troubleshooting, and securing enterprise and ISP networks. Strong background in MikroTik, Cisco, pfSense, network performance optimization, redundancy, failover, and infrastructure management, with strong analytical and problem-solving skills.


Core Technical Skills
  • MikroTik RouterOS Configuration & Administration
  • IPv4 / IPv6 Networking
  • eBGP / iBGP Configuration & Troubleshooting
  • ISP / IX Peering & Upstream Connectivity
  • BGP Route Filtering & Route Policies
  • Traffic Engineering & Routing Optimization
  • Network Redundancy & Automatic Failover
  • OSPF / OSPFv3
  • VLAN & Layer 2/Layer 3 Switching
  • PPPoE / IPoE / DHCP
  • NAT & Bandwidth Management
  • Load Balancing
  • Firewall & Network Security
  • Cisco Router & Switch Configuration
  • NOC Operations & Network Monitoring
  • Network Troubleshooting & Performance Optimization
  • Network Backup & Configuration Management
  • Virtualization & IT Infrastructure

Professional Experience

Network Administrator

GEMSTAR CATV and Internet Service Provider, San Francisco, Agusan del Sur

April 2011 - 2025

Key Skills & Responsibilities:

  • Managed and supported 7,000+ cable and internet subscribers, providing 24/7 Level 3 NOC support and technical troubleshooting.
  • Configured and maintained MikroTik routers, L3 switches, and Cisco routers/switches, including VLANs, routing, route redistribution, filtering, and network security.
  • Administered MikroTik CCR2216, CCR2116, CRS518, CRS317, Load balancers, and ISP network infrastructure.
  • Designed, implemented, and maintained LAN, WAN, wireless, data center, and network infrastructure with a focus on availability and reliability.
  • Experienced in FTTH/FTTx technologies, including EPON/GPON OLTs, ONU/ONT, XPON, NAPs, LCPs, fiber splicing, OTDR, and fiber fault troubleshooting.
  • Performed network monitoring, maintenance, upgrades, security configuration, performance optimization, and hardware/software troubleshooting.
  • Supported servers, workstations, CCTV, biometric attendance systems, printers, and IT peripherals.
  • Administered Windows Server environments and common enterprise IT applications, security tools, and remote support platforms.
  • Prepared network designs and documentation using Microsoft Visio.
  • Monitored and maintained Cable TV Head-End and Internet infrastructure to ensure continuous service operation.
  • Handled helpdesk operations, ticket coordination, escalation, and follow-up with NOC and field engineering teams.
  • Coordinated with suppliers, contractors, and consultants for network equipment, materials, tools, and technical services.
  • Assisted in fiber-break detection, ECI equipment troubleshooting, OTDR testing, and fiber network restoration.

    • Career Achievements:
    • Managed LAN/WAN, routing, switching, network services, and technical operations across seven municipalities in Agusan del Sur.
    • Supported the expansion of CATV, Internet, and Digital TV networks, contributing to growth of 7,000+ subscribers over 13+ years.
    • Provided advanced troubleshooting for network, server, routing, switching, and connectivity issues, improving service reliability.
    • Designed and implemented network upgrades to support subscriber growth, bandwidth expansion, and service scalability.
    • Participated in the deployment of Digital TV infrastructure, integrating network and distribution systems for expanded digital services.

Student Assistant (S.A)

STI College, San Francisco, Agusan del Sur

May 2009 - April 2011

Key Skills & Responsibilities:

  • Perform installation, upgrades, troubleshooting and repair of hardware such as PCs, peripherals, printers, CCTV Camera, routers, switches, hubs, modems.
  • Installation of PCs and Operating Systems such as Win98, NT, 2000, 2003, XP, Windows 7, 2003 Server, 2008 Server.
  • Perform installation software programs such as VB.Net, SQL Server, Php, Java, NetBeans, MS Office, Anti-Virus, Photoshop, Adobe Illustrator, etc.
  • Perform installation such as USB Bootable, CD-ROM, DVD, Driver installation, software and windows updates, creating image, Upgrade, Multiboot, Remote Access, image deployment, partitioning, formatting, factory recovery partition, Workgroup and Domain setup.

Network Infrastructure Projects

Network Engineer Support

Skyline Communication Network Inc., Bayugan City, Agusan del Sur

June 2025 - Present

Key Skills & Responsibilities:

  • MikroTik Server Configuration.
  • Layer 2/3 Switching
  • Load Balancing & Auto Failover
  • Bandwidth Management
  • Vlan Routing & Inter-Vlan Configuration
  • IPOE Server Setup
  • Link Aggregation
  • Network Design
  • Implementation and Support
  • Network System Monitoring
  • Queue and Policy routing
  • Firewall Hardening
  • DDoS Mitigation
  • Secure Remote Access
  • User Management and Authentication

IT Support Engineer

Invision IT Distribution Corp., Central, Luzon

March 2023

Key Skills & Responsibilities:

  • Configuring Mikrotik Server and Switches.
  • Upgrading firmware.
  • Failover, Load-Balancer configuration
  • LAN/WAN Configuration
  • bandwidth Management configuration
  • VLAN Configuration
  • Queues configuration
  • Hotspot Server configuration
  • PPPoE Server Configuration
  • DHCP Server Configuration
  • Traffic Monitoring Graphs
  • Backup Automation

Technical Support Engineer

Love Net TV & Internet Service Provider, Tagum, City

December 2022

Key Skills & Responsibilities:

  • Configuring Indoor and Outdoor OLT KT-PTC88C, KT-PTFD8C.
  • Configuring EPON / GPON OLT indoor, outdoor ftth technology.
  • Good in designing the network structure with the help of VISIO.
  • Configuring Linux server such as Multi-wan isp, Load Balancing, failover, bandwidth management.
  • Expertise in Configuration of VLANs using Cisco Switch 3850 with troubleshooting of inter-VLAN routing and VLAN trunk using 802.1Q.
  • Good knowledge of troubleshooting, implementing, optimizing and testing of static and dynamic routing protocols.
  • Maintaining and troubleshooting of connectivity problems using Ping, Trace route.
  • Technical assistance for LAN/WAN management and customer issues.
  • Backup and restore device configuration.
  • Other responsibilities also included documentation.
  • IP readdressing, bandwidth upgrades etc.
  • Switch Integration, Configuration using Putty during Indoor network setup.

IT Specialist

AMA College, San Francisco, Agusan del Sur

October 2019

Key Skills & Responsibilities:

  • Install and configure wireless networking equipment.
  • Install network software, including security or firewall software.
  • Design and Implement LAN/WAN IT Infrastructure.
  • Technical Support.
  • Install new hardware or software systems networks.
  • Perform data backups and disaster recovery operations.
  • Configure, monitor, and maintain email applications or virus protection software.
  • Configuring and troubleshooting desktops, laptops and servers.
  • Handle and troubleshoot operating system installations, software installations such as MS Office, Anti-virus and Printer installations.
  • Diagnose, troubleshoot, and resolve hardware, software, or other network and systems problems, and replace defective components when necessary.
  • Perform systems/software administration, backup/recovery monitoring, problem resolution, and change management.
  • Perform ongoing performance tuning, hardware upgrades, and resource optimization as required.
  • Configure CPU, memory, and disk partitions as required.
  • Apply upgrades on a regular basis, and upgrade administrative tools and utilities.
  • Assist in all desktops, laptops, printers, networks, email, MS Office, and other applications.
  • Follow defined operating procedures to ensure that clients, systems and information are properly followed.

IT Consultant

Psalms Cable TV & Internet Service Provider, Isabela, San Mateo

July 2015

Key Skills & Responsibilities:

  • Configuring Indoor and Outdoor EPON / GPON OLT.
  • Good in designing the network structure with the help of VISIO.
  • Configuring Linux server such as Multi-wan isp, Load Balancing, failover, bandwidth management.
  • Good knowledge of troubleshooting, implementing, optimizing and testing of static and dynamic routing protocols.
  • Maintaining and troubleshooting of connectivity problems using Ping, Trace route.
  • Technical assistance for LAN/WAN management and customer issues.
  • Backup and restore device configuration.
  • Other responsibilities also included documentation.
  • IP readdressing, bandwidth upgrades.
  • Switch Integration, Configuration using Putty during Indoor network setup.

IT Consultant

Bongao Cable TV & Internet Service Provider, Isabela, City

March 2015

Key Skills & Responsibilities:

  • Configuring Indoor and Outdoor EPON / GPON OLT.
  • Good in designing the network structure with the help of VISIO.
  • Configuring Linux server such as Multi-wan isp, Load Balancing, failover, bandwidth management.
  • Good knowledge of troubleshooting, implementing, optimizing and testing of static and dynamic routing protocols.
  • Maintaining and troubleshooting of connectivity problems using Ping, Trace route.
  • Technical assistance for LAN/WAN management and customer issues.
  • Backup and restore device configuration.
  • Other responsibilities also included documentation.
  • IP readdressing, bandwidth upgrades.
  • Switch Integration, Configuration using Putty during Indoor network setup.

IT Consultant

Wise Cable TV & Internet Service Provider, Tagum, City

April 2013

Key Skills & Responsibilities:

  • Configuring Indoor and Outdoor EPON / GPON OLT.
  • Good in designing the network structure with the help of VISIO.
  • Configuring Linux server such as Multi-wan isp, Load Balancing, failover, bandwidth management.
  • Good knowledge of troubleshooting, implementing, optimizing and testing of static and dynamic routing protocols.
  • Maintaining and troubleshooting of connectivity problems using Ping, Trace route.
  • Technical assistance for LAN/WAN management and customer issues.
  • Backup and restore device configuration.
  • Other responsibilities also included documentation.
  • IP readdressing, bandwidth upgrades.
  • Switch Integration, Configuration using Putty during Indoor network setup.

Computer Technician

Internet Cafe's, San Francisco, Agusan del Sur

January 2011-2015

Experience installation, upgrades, repairs, troubleshooting of hardware such as PC assembler, peripherals, printers, diskless setup, routers, switches, hub, LAN/WAN connectivity issues, processing documents, equipment inventory, Café timer, CCTV Cameras.

  • Draft’s Point Internet Cafe
  • Koger & Koger Internet Cafe
  • WangNet Internet Cafe
  • I.VMF Internet Cafe
  • WY-FI Internet Cafe

IT Consultant

DepEd Agusan del Sur, Patin-Ay, Agusan del Sur

January 2012

Key Skills & Responsibilities:

  • Install Internet Connections
  • Set up equipment for staff, including installing cables and hardware.
  • Configure Sophos XG 210 UTM Firewall
  • Setup NAS Storage Synology
  • Assembling & Cabling Rack & Stack 12U, RJ Patch panel 24 ports, Cat6E.

Trainings & Seminars

AWS Cloud Practitioner, August 2023

Professional Certificate

Microsoft Azure Administrator Associate, January 2023

Professional Certificate

Microsoft Fundamentals, August 2022

Professional Certificate

Microsoft Security, Compliance, and Identity, August 2022

Professional Certificate

Microsoft Data Fundamentals, August 2022

Professional Certificate

AWS Siklab ng Philippines Cloud Architecting, August 2022

View on Amazon Web Services

AWS Siklab ng Philippines Cloud Foundations, June 2022

View on Amazon Web Services

AWS Siklab ng Philippines Machine Learning, June 2022

View on Amazon Web Services

IBM Cyber Security Analyst, November 2021

View on Coursera

Security Analyst Fundamentals, February 2021

Specialization Certificate

IT Fundamentals for Cybersecurity, February 2021

Specialization Certificate

Fortinet NSE1 Network Security Expert, April 2021

View on Fortinet

Fortinet NSE2 Network Security Expert, May 2021

View on Fortinet

Architecting with Google Compute Engine, November 2020

Specialization Certificate

Google IT Automation with Python, December 2020

Professional Certificate

Google IT Support, November 2020

Professional Certificate

Cyber Security Analyst, November 2020

Professional Certificate

Cisco Certified Network Associate Master Class, November 2021

View on Tech Academy Philippines

AWS Cloud Front Serve content from multiple S3 Bucket (November 2021)

Specialization Certificate

Cloud Engineer with Google Cloud, October 2020

Specialization Certificate

AWS Solutions Architect Master Class, November 2020

Adverva Media Academy

Preparing for Google Cloud Certification: Cloud Engineer, November 2020

Specialization Certificate

Preparing for Google Cloud Certification: Cloud Architect, November 2020

Specialization Certificate

AWS Fundamentals, November 2020

Specialization Certificate

Computer Systems Servicing NC II, March 2015

View on TESDA

PLDT IGATE Seminars, April 2015

View on PLDT

Phillipines Cable TV Association of the Philippines, September 2014

View on PCTA Philippines

Computer Networking, Malware, Virus Removal, September 2014

View on STI College

Adobe Photoshop Workshop, September 2010

View on STI College

Computer Hardware Servicing NC II, January 2010

View on TESDA

Affiliations & Leadership

San Agustin Institute of Technology

Position: Public Information Officer (P.I.O.)
Organization: Philippine Association of Students in Office Administration (PASOA Philippine)
School Address: San Agustin Institute of Technology, Bukidnon
Date: February 2019

Saint Francis Xavier College

Position: President
Organization: Philippine Association of Students in Office Administration (PASOA)
School Address: STI San Francisco, Agusan del Sur, Philippines
Date: May 2019

Saint Francis Xavier College

Position: Documentary Officer
Organization: Bachelor of Science in Office Administration
School Address: STI San Francisco, Agusan del Sur, Philippines
Date: March 2019

Systems Technology Institute (STI)

Position: President
Organization: Information and Communication Technologies (ICT)
School Address: STI San Francisco, Agusan del Sur, Philippines
Date: April 2011

Systems Technology Institute (STI)

Position: Editor-in-Chief, Yearbook
Organization: Yearbook Layout and Dummy Making
School Address: STI San Francisco, Agusan del Sur, Philippines
Date: February 2011