Greg Retkowski Network Architect, Systems Integrator, & Project Manager 408-455-3913 / greg@rage.net Executive Summary: Ten years experience planning and executing Internet-centric networking and development projects in fast paced demanding startup environments. Proven track record of delivering ground-breaking technological projects within schedule and budget constraints while exceeding client expectations. Adept at all aspects of network and server management, with a hands-on approach to networking projects. Satisfied clients include Internet startups such as Avvenu, Mediaplex, SpeedEra, 8x8, & Chip Express. Strong problem solving, communications and leadership skills. Broad-based skills and expertise, diverse background. * Technical Skills: Hardware & Operating systems: Intel/Linux, Redhat Enterprise, Fedora, ia64 & multi-processor Intel/Microsoft, NT/2K XP/Vista Sun/Solaris, 2.5-9; Enterprise hardware Network Appliance, 740, ONTAP Cisco/IOS, Routers 7xxx, Catalyst's 65xx F5/Big-IP, Load Balancers 1500 Protocols: NFS, SMB, NIS/YP, NIS+, NT Domain, DNS (BIND), SIP, Radius, and LDAP Mail: Sendmail, MS Exchange, procmail, SPF, SMTP, POP3, IMAP4, ListServ, RBL Web: Apache, IIS, Ruby on Rails, mod_perl, java servlets, tomcat, PHP Web Applications: Wordpress, Wikis, RT, Facebook Integration, Openads/OpenX Networks: 1Gb TP & Fiber, layer-3 & VLAN, WiFi/WEP/WPA, RIP, IGRP/EIGRP, OSPF. Security: Firewall-1, iptables, NAT, SSH, SSL/TLS, VPN's incl IPSEC & PPTP, Splunk Storage: Raid 0,1,5 +Journal, Veritas. Legato, DLT/LTO tape libraries, iSCSI, Bacula Network Management: sniffers, montoring (nagios & mrtg'isms), SNMP, syslog-ng, Automation: Kickstart, PXE, Yum/Yam, Cfengine, capistrano, rsync, dsh, sudo, xen Development: Perl, PHP, C, Ruby on Rails, Python, Java, HTML, CSS; cvs, sql, svn Databases: Oracle 7/8, PostgreSQL, MySQL * Experience 2004-Current Senior Network Architect, Avvenu, Inc; Palo Alto, CA Designed and deployed lights-off resilient network infrustructure for the roll-out of a remote access service. Created a self-healing ability in the network utilizing NAGIOS and cfengine. Automated all levels of management of the network, from host installation through application upgrade via cfengine and other tools. Evaluated network hardware, colocation facilities, operating systems, and management tools based on requirements of service and software. Wrote and deployed a Ruby on Rails application to manage shared music for subscribed users. Supported Avvenu's Facebook application by deploying development and production environments and working with development team. Deployed new corporate website which included re-coding CSS/HTML, deploying and customizing Wordpress, wrote a database-backed management system for press releases. Set up openads (OpenX) to manage rotating content internal to the Avvenu application. 2002-2004 Project Implementer, Chip Express Corp; Santa Clara, CA Senior technical expert in UNIX and Networking systems. Deployed Linux- based LSF (grid computing) environment. Planned and deployed a UCE reduction plan including Real-time Blackhole Lists (RBL) and real-time antivirus scanning of inbound mail. Implemented automated unnatended installation system for Solaris and (Redhat) Linux. Deployed gigabit fiber backbone connecting three server/telco rooms. Selected, customized, and deployed a Document Management System. Wrote performance metric & sizing system for HPUX & Solaris systems to determine when utilization exceeds available network resources. Updated & debugged chip design workflow tool in TCL/TK. 2002-Current Technical Advisor, WheresCherie.COM; Fountain Valley, CA Selected design layout, hosting, and software package for site. Customized and extended the functionality of the 'Edge' content engine. Submitted changes back to maintainers who rolled changes into new releases. Worked extensively in PHP & MySQL. The site was featured on 'Yahoo! Picks' (Yahoo!'s site of the day). 2004-2005 Infrastructure Consultant, Integrated Devices; San Diego, CA Designed WiFi security solution which implements VPN tunneling over WiFi for secure WiFi access to internal resources. Performed network audit and made recommendations for improvements. Deployed source control for developers. 2004 Infrastructure Consultant, TruSonic Inc; San Diego, CA Engineered network architecture for spin-off of TruSonic from MP3.Com. Deployed routers for WAN and co-location facility. 2000-2001 IS Manager, Netergy Networks (8x8); Santa Clara, CA Planned, managed, and deployed corporate-wide unified directory services. The directory services project unified authentication across applications and operating system platforms. Implemented the SecurID system for VPN users. Put in place a trouble-ticketing and network monitoring & notification systems for IS department. Managed changeover from daisy-chained switch architecture to Layer-3 / VLAN switching using Catalyst 6500 series switches. 2000 IS Manager, SpeedEra Networks; Santa Clara, CA Automated management of ~30 Linux workstations. Established policies and procedures for user interface to IT department. Centralized and simplified network administration by implementing an unattended install system, and user support tracking database. The unattended install system was adopted by Operations and allowed the deployment of over 300 servers within three months. Delivered web-based content management utilities for distributed caching architecture. The project included utilities for purging content from deployed caches, managing customer access, and configuring cached domains. Deployed mod_perl/apache-ssl application servers to host the utilities. 1999 Move Coordinator, Bamboo.Com (now IPIX); Palo Alto, CA Planned and executed a network build-out in new facilities for the expanding engineering team, including evaluation of power, telco and environmental capacities. Specified and ordered all required systems and hardware. Established required underlying network infrastructure including authentication and name services, firewall filter and translation rules, and remote management capabilities. Re-engineered the existing Exchange based mail system with the addition of two UNIX based mail exchangers to provide compartmentalized redundant fault tolerant multi-tier mail routing solution to replace the flat structure previously in place. Wrote web based application to provide easy management of mail routing tables for I.S. personnel. 1999 Network Architect, MediaPlex (now ValueClick); Cupertino, CA Managed a pair large-scale webfarms comprised of Linux and Solaris, averaging over 25 million hits a day. Tuned webserver and operating system for optimum performance under load. Designed and managed network integration using tools such as nisplus, rsync, and ssh. Created and implemented key policies in the areas of security and disaster recovery. Played a key role in the success of the pre-IPO audit. 1998-1999 Senior SysAdmin, SaveSmart Inc; Mountain View, CA Worked as a member of a team to administer companies' computing assets. Personally responsible for WAN links, LAN infrastructure, and majority of UNIX system administration tasks. Provided underlying Operating Environment support for 2 major releases and a facilities move. Grew UNIX network from 6 Ultra 1 servers to over 50 servers ranging from Ultra 1 to Enterprise 4500. 1997 IT Manager, PocketScience Inc; Santa Clara, CA Managed a 50 node administrative and development network including Solaris/x86, Windows 95, and Windows NT systems. Designed and implemented network infrastructure for first beta release. 1995-1997 Network Administrator, Safari Internet; Ft Lauderdale, FL Grew network from inception to a 1500 user, 300 domain, 30 WAN port, 170 dial-in port Internet Service Provider. Responsible for all aspects of network administration in addition to Internet related programming and consulting for company customers. 1995 Systems Maintainer, US Army; Port Au Prince, Haiti In addition to normal duties, tasked with the maintenance of the unit's laptop computers. Troubleshot, maintained, and provided training in the use of these assets. 1991-1994 LWV Mechanic. US Army; Schofield Bks, HI Part of a team responsible for the smooth operation of wheeled assets for a combat engineer battalion. Grew proficient at basic working skills including responsibility, leadership, self-reliance, and initiative. Personal Achievements: Co-designed, Tested, and Implemented a homebuilt wireless router with a 1 megabit capacity at 13+ miles in 1998. Responsible in whole or part in several Open Source software initiatives; ported LDAP nameservices to Linux, wrote an authentication hash library for TCL/TK, wrote several HOWTO's including Wireless-Router and LDAP-authentication, and worked on several web based projects including a search-engine submittal tool and a re-work of the Gnats system web frontend. Contributed to the 'Edge' community engine. Deployed a 8 node 2 segment 100-base-T enterprise class network to provide remote management and monitoring facilities for the house lava lamps. Published an article with Oreilly, titled "Self Healing Networks with NAGIOS & Cfengine". Eagle Scout, Army Veteran **** Do not re-distribute this resume without obtaining my consent. Thank You.