Resumé
Current Position
- Manager of 16 Unix systems administrators in Collegeville, PA; Boston, MA; and Bangalore, India.
- Team responsible for all production Unix/Linux servers across entire enterprise, including DR and Pre-Production. Secondary responsibility for Development and QA servers. Total server count over 800.
- Additional team responsible for Enterprise Solutions: evaluates new hardware and software technologies prior to project implementation.
Unix/Linux Sysadmin Experience
- Member of 12 person Linux team managing 500+ Linux servers
- Oracle RAC setup with several 2-node Linux clusters implemented
- Virtual machine experience encompassing VMware, Xen, Virtual Iron
- System hardening using ipchains/iptables, tcpwrapper
- Monitoring using Nagios, HP OpenView, APC UPS integration, mrtg/rrdtool
- Experienced with multiple host interfaces to split application traffic from management traffic
- Solaris sysadmin for 20 Sun servers running Solaris 2.6, 7, and 8.
- Server consolidation project to migrate from current mix of K-, L-, N-, and V-class HP database servers to HP "Superdome" or "Mini Superdome" servers.
- Sole responsibility for migration from 2 production HP K-class servers (HP/UX 10.20) to 2 new V-class servers (HP/UX 11.0) with all applications and databases intact.
- HP/Sun systems administration backup for more than 70 machines of the HP-9000/700 and 800 series as well as Sun Sparc 5, 10, and 20s.
- Upgraded HP-9000 700 and 800 series machines running HP-UX 9.04 or 9.05 to HP-UX 10.20.
- Linux sysadmin for 20+ Linux servers and workstations – experience includes RedHat Linux, CentOS, Gentoo, Debian, and SuSE distributions.
Disk Storage Experience
- Storage mapping and best performance allocations on EMC Symmetrix (DMX1000 models), CLARiiON (CX700) and IBM DS8100 disk arrays.
- Standardized storage models for multi-Terra Byte databases.
- Online storage migration between different arrays of storage (same or different brands & LUN sizes) using volume manager software tools.
- Expereinced with SAN multipathing software: EMC PowerPath and IBM SDD
- Training on HP XP1024 disk arrays.
- Project to migrate from direct-connect EMC to SAN-attached IBM ESS storage.
- Performed head-to-head testing of new disk array hardware for QA environment. Worked closely with both HP and IBM to test HP's Virtual Array vs. IBM's Fast-T. Configured both arrays to HP L-class servers on a SAN and wrote test scripts to model I/O performance both with self-written C programs as well as typical queries run with Oracle databases.
- Moved IBM ESS (Shark) from role as QA disk array into production SAN use configured with FlashCopy for backups and QA refreshes.
- Reconfigured EMC 3430 disk array to lay out filesystems in more efficient and less confusing manner for DBAs and systems administrators.
Network Experience
- Interface with Network team for server IP address requests, routing issues
- Packet capture & diagnoses using ethereal/wireshark, tcpdump
- Created traffic rules within NetScreen firewalls to prioritize and limit "non-production" traffic.
- Set up network consisting of 2 T1s from different providers (UUNET and Cable & Wireless) with BGP4 load-balancing across them; traffic shaping rules to utilize both T1s almost equally for normal daily traffic loads.
- Managed IP address space of a /23 (512 address block) of UUNET-assigned IP addresses.
- Installed NetScreen firewalls NS100 and NS5XPE.
- Installed Network Intrusion software (NIDS) to monitor and log abnormal activity to and from the u1.net network.
- Converted from a hub-based backbone to an entirely Cisco switch managed backbone utilizing VLANs on the Cisco switches to allow one switch to span multiple networks.
- Upgraded the central router from a Cisco 4700M with 64MB RAM to a Cisco 3640 with 128MB RAM.
- Established ISP co-location setup with high profile web clients to assure highest possible uptime for web site.
- Installed network supporting PCs running Windows 2000 (server and workstation), Windows NT 4 (server and workstation), Windows 95, several Unix machines running Solaris, FreeBSD, Linux, etc. and some Macintoshes. Also responsible for administration of same machine base.
- Set up DNS to support backup on u1.net as well as primary and secondary resolution for more than 75 client domains.
- Set up and maintain web server farm including several Apache and IIS web servers supporting more than 50 different client web sites.
- Installed secure site certificates for both client and Universal web servers to allow secure HTTP (https) access to web sites.
Oracle DBA Experience
- Multi TB production database support (6+TB database) with Partitioning and Text index, with DR instance via DataGuard (Physical)
- Oracle 9i to 10g database upgrades
- Oracle Text (InterMedia) indexes with 9iR2 databases and Partitioning.
- Installed RAC on Linux (9iR2 under RedHat Advanced Server 2.1) with SAN-attached fiber-connected storage – 2 node cluster.
- Member of 7-person DBA team supporting 20 production (24x6 ½) and 40+ development and test/QA Oracle instances running on HP K-, L-, N-, and V-class servers and representing almost 4TB of data (1 ½TB production).
- Installed, configured, and maintain Oracle 8.0.3 database and upgraded to Oracle version 8.0.5. Installed 2nd production database running Oracle 8.1.7 and 3rd production database running Oracle 8.1.7 under Linux.
- Tested configurations of Oracle 9i running on IBM x330 servers running RedHat Linux with SAN-attached disk.
- Upgraded production order entry database (approximately ¼ terabyte in size – approaching ½ terrabyte) from Oracle 7.3.4.3 to Oracle 8.1.6.2 (now 8.1.7.3) and then worked with software vendor to identify and isolate performance-related problems resulting from database upgrade.
- Supported VWR's order-entry database and worked with application vendor to identify slow queries in need of tuning.
- Sole DBA responsible for 25 Oracle 7.x production instances running 24x7.
- Performance tuning on database and disks to allow inserting more than 1 million records/day as well as automatic and ad-hoc reports.
- Day-to-day adding users, profiling queries, maintaining tablespaces, ensuring success of hot backups, occasional database restores, as well as maintenance during bi-yearly plant shutdown times.
Jobs & Assignments
| Large Philadelphia-area IT firm | 7/2004 to Present |
| Manager, Systems Administration | 3/2007 to Present |
| Systems Architect | 7/2004 to 3/2007 |
| u1.net, Marlton, NJ | 1/97 to 7/2004 |
| Large Philadelphia-area IT firm | 5/2003 to 7/2004 |
| VWR International, West Chester, PA | 8/98 to 1/2003 |
| Visteon, North Penn Electronics Facility, Lansdale, PA | 1/97 to 8/98 |
| Bluestone Consulting, Mt. Laurel, NJ | 12/94 to 1/97 |
| OMNI Services, Culpeper, VA | 2/96 to 1/97 |
| BellSouth, Atlanta, GA | 7/95 to 1/96 |
| Vanguard Group, Valley Forge, PA | 12/94 to 7/95 |
| Science Applications International Corp., San Diego, CA | 1988 to 12/94 |
| Advanced Engineering Analysis, Temecula, CA | 1986 to 1988 |
Education
- National University, San Diego, CA
- Bachelor of Science (Computer Science), 1994
- GMI Engineering & Management Institute, Flint, MI