William . Email & Phone Number

Singapore

- Perform network administration in a heterogeneous environment (production, DR, test) comprising of network and security equipment, telecommunication links.- Perform hardening, upgrade and enhancement on IT infrastructure components.- Monitor, assess, schedule and implement network, and product-specific security vulnerability patches.- Monitor obsolescence of IT infrastructure components (network systems).- Monitor expiry and perform renewal of network system password and certificates.- Implement network backups operations to ensure data recoverability and business continuity.- Execute disaster recovery plans for IT infrastructure (network systems) and conduct regular disaster recovery testing and component switchover exercises to ensure usability of standby and DR equipment.- Provide second level network support and resolve incidents and problems in accordance to established Service Level Agreement.- Perform problem diagnosis on incidents and implement measures to prevent recurrence.- Schedule and release network system changes to production environment in accordance to the change management process / procedures.- Develop and maintain a comprehensive operating system hardware and software configuration database / library of all IT infrastructure components used in the production environment.- Perform infrastructure system and network capacity monitoring and planning.- Monitor and perform performance tuning to optimize network performance.

Medan Kota, North Sumatra, Indonesia

- Managed daily BAU of 100+ HQ branch nodes and network connectivity.- Worked on Cisco Switch Catalyst 2960/3560/4500 Series, Router 1921/ISR4451 Series.- Deployment and Maintenance of Cisco IP Phone to Head Office & Branches.- Maintenance and Implementation of Solarwinds Orion Monitoring System.- Maintenance and Implementation of Fortigate 500D for Internet and VPN access.- Implement firewall request for Palo Alto PA3020.- Performed bi-annual firewall rules review to ensure no stale/shadowed rules.- Implemented DHCP Server configuration on HQ's and branches' Router for efficienthandling of IP Address changes of end devices.- Implementation of SIEM – Qradar for Bank’s central reporting.- Implementation of Kaspersky Endpoint Security for security hardening andvulnerability assesment.- Performed Drive encryption on endpoint devices using Kaspersky FDE (Full DiskEncryption).- Performed annual review of Active Directory Group Policy for end devices.- Performed quarterly baseline review of network devices to ensure configuration arecompliant to central bank standard.- Tech refresh of Branch Unmanaged switches to Cisco SF300 Managed switches.- Planned and executed Bi-annual disaster recovery plan (DRP).- Responsible for vulnerability assessment based on CVE publication and planning formaintenance and hotfix patch, including bankwide activity for critical network devices(e.g. Core switch, internet router, firewall).