Responsibilities:* Extraction, Transformation and Loading of corporate network data in preparation for statistical analysis.* Run and maintain Map Reduce pipelines for corporate network capacity reporting and forecasting.* Generate corporate network capacity reports.

Responsibilities:* Testing and introduction of new datacenter networking technologies* Deployment of new greenfield datacenters.* Maintenance and upgrade of Googles worldwide fleet of datacenter networks.* Handle technical escalations for datacenter networking technologies.

Key Achievements:* Wrote Perl script to collect statistics from every interface of all data centre switchesResponsibilities:* Commonwealth Bank of Australia projects with primary focus on deployment of core banking modernisation servers and HP blade enclosures.* Deployment of new 6500 VSS pairs in CBA datacenter to provide additional capacity* Work with operations team to migrate CBA admin buildings and branch sites to Telstra.

Key Achievements:* Designed and implemented connectivity to business partners using Cisco firewall services modules.* Designed and implemented new architecture for BGP to resolve asymmetric routing issues and to provide optimal failover via DR links.* Created security standards for password rotation, third party access and network separation via security zones.* Developed QoS architecture and templates to support voice, video conferencing, streaming video and business critical applications.* Wrote a provisioning application to generate device configurations for routers and switches including settings for telephony and WAAS.Responsibilities:* Technical mentor and escalation point for Unified Communications team.* Review change requests and represent Unified Communications team at Change Approval Board meetings.* Work with project managers to scope, design and deploy network infrastructure, IP telephony and video conferencing to project sites.* Write business cases to obtain funding and management support for new initiatives.

Key Achievements:* Carried out routing configuration changes for mergers of US child companies.* Used CiscoWorks to standardise spanning-tree, AAA, NTP, SNMP and syslog configuration.* Worked with WAN Service Provider and IT Architecture team on creation of QoS standards.* Created templates for configuration of new Cisco network devices.Responsibilities:* Migrated Sydney datacenters and head office 6500 and 3750 switches to rapid spanning-tree.* Configuration of Microsoft ISA proxy arrays for web browsing and load balancing of SAP netweaver servers.* Setup netflow server provide traffic analysis and to assist in troubleshooting network issues.* Liaised with phone system provider in deployment and troubleshooting of VOIP handsets.* Configuration of E1 trunks and T.38 IP faxing on Cisco routers.

Responsibilities:* Support of global enterprise network of over 2000 network devices.* Support and troubleshooting of WAN optimizers, proxies, Cisco ASA and Checkpoint firewalls, routers and switches.* Carried out changes according to change control and security policies.* Support of critical network infrastructure used by financial trading applications.* Configuration of CATOS and IOS switches with security features including dot1x, dynamic arp inspection, DHCP snooping and VACLs.

Key Achievements:* Designed and implemented load-balanced and redundant ASA firewall solution for customer.* Designed and built CCIE and CCNP lab environment.Responsibilities:* Supported over 5000 client connections in a MPLS VPN environment across Australia and the world over a variety of access methods including DSL, Frame Relay, ISDN, dialup, 3G, wireless, Ethernet, Co-location and IPSEC.* Implemented policy-based routing and QoS to support VoIP and customer SLAs* Configured IPSEC tunnels from Cisco routers and ASAs to a wide range of platforms including Cisco, Checkpoint, Netscreen, Sonicwall and Watchguard* Implementation of failover solutions for customer networks including configuration of BGP, EIGRP and HSRP.* Project work including migrations and cutovers to facilitate relocations and company mergers.* Technical mentor for 2nd and 1st level NOC engineers.* Secured customer internet connections using Netscreen ISG and Cisco IOS zone based firewalls.

* Setup switches and IP phones for 45 seat Newcastle and Central Coast flood disaster recovery call centre. * Planned and carried out implementation of new Cisco 6509 core switch.. * Administered Cisco ASA and Microsoft ISA firewalls. * Implemented 802.1x authentication for IT department. * Configured policy based routing on border router to reduce cost of internet connections. * Deployed site to site VPNs and Cisco IP handsets for remote sites. * Standardised network devices with NTP,SNMP, Syslog, SSH and RADIUS authentication

Key Achievements:* Successfully managed migration of organisation wide IP address scheme.* Migrated internet firewalls from Checkpoint to Cisco ASA.* Implemented RSA SecurID Appliances for two factor VPN and wireless access.Responsibilities:* Responsible for Network Administration for an environment of 1400 users, 950 PCs, 1000 phones and 55 servers across 38 sites.* Liaised with PABX provider and microwave network provider during design and implementation phases of phone system upgrade.* Configured QoS for voice and disaster recovery traffic across WAN.* Responsible for antivirus, patch management, email filtering, web filtering and firewall administration.* Undertook project to remove users from the local administrators group on windows PCs. Created GUI frontend for runas to make management of PCs easier for the helpdesk.* Configured Linux servers and firewalls to use Active Directory authentication to reduce the number of passwords users need to remember.* Configured network monitoring for email and SMS notifications* Administrated several FreeBSD and Linux servers and configured Nagios, MRTG, Asterisk, Apache, Squid, Snort, SNMPD, NTPD, iptables and pf.* Carried out network troubleshooting using free tools including Nmap, Nessus, Ethereal, Netsumbler and Microsoft Baseline Security Analyzer.* Maintained network documentation including physical network diagrams, VLAN diagrams and connectivity troubleshooting workflows.