Designed, built, and ran all aspects of internal IT infrastructure.
Deployed and supported J2EE applications at customer sites nationwide, handled customer production service architecture for Life Sciences oriented 25-person startup, provided technical advice to marketing, sales, support, and product development.
Built datacenter, LAN/WAN, VPN (SSH, OpenVPN), firewall (Linux IPTables, FreeBSD IPFilter), file service (NFS, SMB, FTP), print service, backups (Amanda, shell scripting), bioinformatics compute servers (FreeBSD, UNIX, Linux), web services (Apache HTTP server, Tomcat Application Server), complete email services including spam/virus filtering (Qmail, vpopmail, imap/imaps, spamassassin, clamav), Jabber Instant Messaging service, CVS, domain name service (BIND). Deployed a full featured PBX system using Asterisk Voice-Over-IP Telephony solution for interoffice and outside telephone service; implemented single sign-on authentication using OpenLDAP service intergraded with Microsoft Active Directory environment. Maintained automatic Windows software installation using SUS/WSUS and domain policy
Installed and maintained relational database software (Oracle 9/10, MySQL), and object databases (ObjectDB). Developed a sophisticated automated 

build/test/deployment system using Apache Ant and Unix shell scripting. Performance-tuned enterprise web application systems.