Venus G. Dionisio

Chubb /Network Security Engineer

February 2026 – June 2026

• Monitored data streams and initiated time-based checks when managed devices lost connectivity; investigated and
resolved documented network issues.
• Examined device configurations and functionality to identify and remediate network-related problems; displayed
device health and outage tickets in monitoring tools.
• Assisted in developing SOC processes and procedures to improve incident response times and overall security
operations.
• Conducted security assessments to identify and mitigate risky configurations; generated automated compliance reports
to reduce auditing time.
• Ensured team adherence to incident and change

management procedures; monitored SLAs for responsiveness and
coverage.
• Provided regular service management reports and statistics; mentored and supported L1 Network Security Engineers.
• Led solution architecture assignments across multiple projects in alignment with enterprise architecture standards.
• Developed guides and SOPs; assisted with vulnerability assessments and documented Network Services architecture
across the enterprise.
• Evaluated emerging technologies and engaged vendors for solution reviews, detailed design, and best practices
evaluation.
• Conducted proactive security research and ensured network security best practices through device auditing.
• Provided escalation (L2/L3) support for Cisco ASA/Firepower, Palo Alto NGFW, Illumio, Cisco Umbrella, ForeScout,
Akamai WAF, and Microsoft Defender Suite.
• Delivered 7x24 on-call support.

Satellite Office, Taguig City/ Senior Network Security

May 2025 – September 2025

• ACSC Essential Eight Implementation: Applied mitigation strategies across maturity levels 1–3, including patch
management, application control, and user privilege hardening. Conducted gap assessments and developed remediation
plans to elevate security posture.
• SOC Monitoring: Monitored and triaged real-time alerts using SIEM tools. Investigated anomalies, escalated incidents,
and coordinated response actions with internal teams.
• Network Auditing & Compliance: Performed audits of Meraki Configuration as part of the redesign project.
• Change Management & Implementation: Created detailed change requests for security enhancements. Led firewall rule
updates, endpoint hardening, and DNS zone modifications with post-change validation and rollback planning.
• Monitoring & Alerting Configuration: Developed KQL queries for log analytics and custom alert rules. Configured
action groups for automated notifications and escalations.

• Company Overview: (Managed Service Provider)
• Initiate pre-emptive maintenance and vulnerability scans using Nessus Software, aligning with cloud security best practices
• Implemented and managed network devices, including firewalls (Checkpoint, Palo Alto) and switches, paving the way for a transition to cloud security roles
• (Managed Service Provider)

• Company Overview: (Managed Service Provider)
• Implemented network security projects, including firewall configurations and IPSEC Tunnel setups, demonstrating a strong foundation in security principles applicable to network environments
• Enhanced security postures through the deployment of ClearPass Network Access Control and standardization projects
• Palo Alto Global Protect Solution Solutions for SSL VPN, Palo Alto Firewall Build Setup, Palo Alto/Cisco ASA IPSEC Tunnel Build
• Conducts vulnerability assessment of network devices using Nessus Software
• Network health review, proposal for upgrades and remediation to network devices of small enterprise clients
• (Managed Service Provider)

• Company Overview: (Managed Service Provider)
• Provisioning of WAN Connection and migration of WAN kit (router, switch, and Optimizer Riverbed) from SingTel to Starhub
• Plan: Verify client's setup behind the WAN kit and the LAN subnets that must be advertised out to the Data Centre and Headquarters site
• Allocate & assign WAN IPs & AS number to sites, provide base configuration to Star Hub Field Engineer
• Proceed on Phase 1-4 of configuration, cutover and decommission of old WAN Kit
• Incident, requests, and project support for the network tech refresh of all devices that includes network switch, access points, firewall and network 3 tier architecture for web, application and database project support and setup
• Fine tuning & app-id implementation of policies and settings on the Palo Alto Firewall
• (Managed Service Provider)

• Company Overview: (Managed Service Provider)
• Dedicated Network support for Asia Pacific sites who have been involved on the tech refresh of network devices following the standard configuration for merger of the Asia Pacific sites to the Global Network Infrastructure
• Incident and Request fulfillment and liaise with internal infrastructure team, vendors, and telecommunication carrier in resolution of incidents to ensure optimal configuration, maximum up time on services
• (Managed Service Provider)

• Company Overview: (Telecommunications)
• Provides technical support to manage data services in a large-scale enterprise, detect anomalies and performance issues using Verizon's proprietary ETMS alert handling system
• Takes ownership of customer issues and drives them to completion ensuring high levels of customer satisfaction
• Perform end-to-end trouble isolation and repair on physical and logical layer services using the Enterprise remote BER test tool for the customers and devise action plans on more complex issues, as well as oversee the execution of these plans
• Utilize network performance monitoring tools like CA Health and NetOps to identify and analyze impairments that may affect services sold
• Monitor and maintain the company's network elements (Routers, Switches, Transmission, switching facilities) using Nagios and SolarWinds Monitoring System
• Responsible for effective isolation, troubleshooting and restoration of customer PSTN, DSL Lines, International Private Lease Circuits, Domestic Lease Lines by analyzing the diagram, doing loop testing using tools like JDSU BER tester, coordinating with carriers, and conducting of inhouse fault clearing (i.e
• Rewire of cable, reseat and replacement of modems, IDF patching)
• (Telecommunications)