SREI THAI

Core Responsibilities Key Projects

1. Pre-Sales & Solution Design

• Conduct technical assessments to recommend Cisco/Huawei/H3C hardware (switches, routers, firewalls) matching client requirements
• Create bill of materials (BOM) for SD-WAN, FTTH, and data center deployments
• Develop network topology diagrams using Visio/Lucidchart

2. Hardware Deployment & Configuration

• Install/configure multi-vendor devices:
  Cisco: Catalyst 9K, ISR 4K, ASA firewalls
  Huawei: CE6800/S12700 switches, NE40E routers
  HPE Aruba/Dell EMC: PoE switches, PowerEdge servers
• Implement out-of-band management (iLO/iDRAC) for remote troubleshooting

3. Testing & Validation

• Perform hardware burn-in tests before client delivery
• Validate configurations against ISO/ANSI standards
• Replicate client environments in GNS3/eNSP labs for proof-of-concept

4. Technical Support & Documentation

• Resolve L3 escalations for deployed hardware (e.g., BGP flapping, H3C IRF stack failures)
• Maintain KB articles for common hardware issues (e.g., Cisco IOS-XE bugs)
• Deployed 200+ Huawei OLTs for ISP clients with GPON provisioning
• Migrated a bank’s core network from Cisco to H3C Comware V7

Key Responsibilities Technical Environment

Design, implement, and maintain robust network infrastructure across multi-vendor environments (Cisco, Huawei, H3C, Dell EMC, HPE), ensuring high availability, security, and performance for enterprise and service provider networks.

✔ Network Deployment & Configuration

• Deploy and manage Cisco/Huawei/H3C switches, routers, and firewalls (OSPF, BGP, VLANs, MPLS).
• Configure FTTH/GPON systems (OLT/ONU, Huawei MA5600T, H3C CG220) for ISPs.
• Optimize HPE/Dell EMC server integrations (RAID, iLO, VMware).

✔ Troubleshooting & Performance Tuning

• Diagnose latency, packet loss, and downtime using Wireshark, SolarWinds, eSight NMS.
• Resolve L2/L3 issues (STP loops, routing flaps, ACL misconfigurations).

✔ Security & Compliance

• Implement firewall policies (Huawei USG, H3C SecPath), VPNs (IPsec/SSL), and NAC.
• Conduct vulnerability assessments and patch management.Key Responsibilities

1. Gaming Network Infrastructure

• Designed/maintained high-availability networks for slot machines, EGM systems, and surveillance with 99.99% uptime
• Deployed isolated VLANs for gaming (IGT/Aristocrat), POS, and hotel systems to meet GLI-21 compliance
• Implemented Cisco/Huawei switches with strict ACLs to segment player data networks from public Wi-Fi

2. Security & Compliance

• Enforced PCI-DSS & gaming regulatory standards through firewall policies (Huawei USG/Palo Alto)
• Monitored SIEM alerts for suspicious traffic (e.g., slot machine tampering attempts)
• Conducted quarterly penetration tests and vulnerability scans

3. Surveillance & Access Systems

• Integrated IP CCTV networks (Milestone/Avigilon) with gaming floor monitoring
• Managed RFID badge systems for restricted area access control

4. High-Stakes Transactions

• Secured cashless payment networks between cage systems and slot machines
• Optimized TLS 1.3 encryption for patron mobile app transactions

5. 24/7 Support

• Led critical incident response for gaming floor outages (mean repair time
• Maintained disaster recovery plans for table game data backups

Gaming Systems: IGT Advantage, Bally CMS, Aristocrat Oasis
Network: Cisco Catalyst 9K, Huawei CE6850, Ruckus Wi-Fi
Security: Splunk, Qualys, GLI-11/19 compliance tools

IT Service Solutions Provider | [Phnom penh and Sihanukvill ]

Core Responsibilities:

1. Client Infrastructure Deployment

• Designed/implemented multi-vendor networks (Cisco, Huawei, H3C) for 50+ SME/enterprise clients
• Migrated legacy systems to SD-WAN solutions, reducing client downtime by 35%
• Deployed FTTH backbones for ISP clients using Huawei OLT/ONU systems

2. Managed Services

• Provided L2/L3 support for 200+ managed switches/routers via NOC
• Automated network audits with Python scripts, improving issue detection speed by 40%
• Maintained 99.95% SLA compliance across client environments

3. Security & Compliance

• Implemented Zero Trust frameworks with ACLs, VLAN segregation, and IPSec VPNs
• Conducted vulnerability assessments using Nessus/Qualys for financial/healthcare clients

4. Cloud Integration

• Configured AWS/Azure hybrid connections for client cloud migrations
• Optimized ExpressRoute/Direct Connect links for latency-sensitive applications

5. Documentation & Knowledge Transfer

• Developed client-specific network playbooks with topology diagrams
• Trained junior engineers on Huawei eNSP/Cisco CML lab scenarios

Key Technologies:

• Hardware: Cisco ISR/ASR, Huawei CE6800, HPE Aruba
• Tools: PRTG, SolarWinds, Ansible, Wireshark