Part of the team managing one of the world's largest data networks.

Part of a team managing ~500 primarily Debian GNU/Linux servers (Also VMware, RHEL, CentOS, Solaris, Win 2k3) supporting thousands of schools and millions of end users worldwide.

Primary software: Debian GNU/Linux, Postfix, MySQL, Apache (v2), Squid, Nagios, Cacti

Primary hardware: Servers - HP, Dell; Storage - HP, NetApp; Networking - Juniper, Extreme, Cisco

• Deployed MPLS across Victorian core network
• Re-built complex network running on legacy Checkpoint (RHEL, Solaris) systems with Juniper SRX & EX combination.
• Re-negotiated several major WAN and Internet transit links resulting in >70% cost savings with increased service levels, estimated first year savings of over $700k
• Lead investigation & deployment of blade servers (HP BladeSystem), lowering server acquisition, maintenance & power costs
• Lead migration to BGP connectivity with APNIC assigned address space, based on a Juniper platform
• Optimised cooling of large (16 rack) office Server Room, improving PUE
• Deployed production-quality IPv6 transit
• Designed and implemented puppet based configuration management system, replacing ad-hoc scripts
• Improved vendor relationships, leading to better access to test hardware and improved support
• Some technical pre-sales consulting

• Designed & built Asterisk based PBX's for clients, ranging from 10-200 handsets
• Developed custom software to closer integrate PBX's into client's networks
• Provided customer support via telephone, internet and site visits
• Primarily worked with the Asterisk PBX on RedHat derivative platforms (RHEL, Fedora, CentOS, OpenSuSE)
  • Systems from Dell & IBM, with telephony interfaces from Digium
  • Phones from Snom, Polycom & Cisco/Linksys

• Designed and implemented a corporate LDAP database, including data migration and ACL's, migrated many services to LDAP including writing custom authentication plugins
• Designed and implemented a corporate spam filter with per user web management
• Implemented a corporate SSL Certificate Authority
• Implemented an automated network Windows & Linux installation system, and semi-automated Mac OS X management
• Designed and implemented a custom Linux (iptables) based multiport bridging firewall
• Designed new office network (Cat6a for upgrade to 10Ge, PoE & Gigabit to all ports, server room design, custom built 19" racks & power systems)
• Designed integrated WPA2-Enterprise wireless LAN with rotating key WPA-PSK for guest access, Cisco AP's authenticating via FreeRadius to corporate LDAP server

• Lead several major hardware & software server migrations
• Re-Designed & upgraded the entire network for high-speed data based on a Cisco core
• Assisted with design of an inventory & client management system
• Redesigned an in-house caching daemon for extra speed and stability
• Assisted with design and Implementation of custom [Debian GNU/Linux based] Linux distribution
• Extensive use of LDAP authentication for networked UNIX systems.
• Languages and technologies used: Linux, LDAP, BIND, DHCP, WINS, CUPS, Advanced Unix Shell Programming. All on Debian GNU/Linux platform

• Successfully designed, and implemented a Windows NT based network for assorted windows based clients (Including NT Server 4, IIS, MSSQL, MS Exchange), upgraded through to Windows 2003 et al.
• Added a (Debian) linux machine to the network to serve as a spam/malware/virus filter, caching proxy, DNS server, DHCP server, mailing list server.
• Maintained a large ASP based (inc. MSSQL backend) matching database system.
• Ported a VB/SQL based matching database system from VB 4 to VB 6 including db access method migration.
• Designed and implemented a web based registration system.
• Successfully upgraded the network to Windows 2003, Exchange 2003, IIS 6
• Languages and technologies used: ASP, PHP, HTTP, SQL (MSSQL), and MAPI, on Windows NT platforms. PHP, Perl, SQL (MySQL), DNS, Squid, on Linux platforms.