February 4, 2008:
Below you will find my resume as it has existed here since 2002. I dislike writing a resume and I am not good at it (one of the few things I am not good at). As I have been getting plenty of emails and phone calls based on this pretty old resume, I thought I would at least add this small paragraph on top with some updates.
In the last 6-7 years I have not done much with networking as my work at Autodaq/Autotradecenter/ATC-Onlane never required much. As it stands I gave up on achieving Cisco CCIE certification as I had no time to work on it nor did I have exposure to much networking beyond simple switch settings with VLANs, trunks and some basic EIGRP/OSPF routing. I have working a little bit more with Juniper Netscreen firewalls including their Netscreen Security Manager application.
As I have been getting calls and emails about DBA positions for Oracle, I would like to point out that I have worked with Oracle only as far it comes to 9i RAC and 10g RAC on the OS level. I have setup OCFS, OCFS2 and ClusterWare. In conjunction with this I have done work on HP MSA1000/1500 SANs, 3Par E200 and S400 SANs, and Brocade Silkworm switches.
Otherwise my work has mostly involved managing the growing server farm of ATC-Onlane, which stands nowadays at 150+ servers. This includes procurring of new hardware, managing hardware repairs (6 Hour Call to Repair with HP), OS installation and patching, OS management via cfengine, OS performance analyzing via collectd and own graphing scripts.

Ulf Zimmermann

1525 Pacific Avenue
Alameda, CA 94501
Phone (510) 865-0204
Cell (510) 396-1764
Fax (510) 521-5073
E-mail: ulf@Alameda.net


Further develop skills in network and system administration. Also interested in software development in regards to network and system administration.

Hardware knowledge

x86 PC Hardware with very good knowledge about HP ProLiant DL and BL series, Cisco Catalyst Switches 2924XL, 3548XL, 4000, 5000, 6000, Cisco Routers 100x, 160x, 25xx, 26xx, 36x0, 4x00, 720x, 75xx, Cisco 3000 VPN Concentrator, SGI Indy, Indigo, Challenge, O2, Origin 200/2000, Nortel Connectivity Extranet Switch, Nortel Baystack switches, Nortel Accelar switches, HP MSA1000 SAN, HP ProCurve Switches

OS/Protocol/Software knowledge

Cisco IOS, Cisco Cat OS, FreeBSD, Linux (mostly RedHat 8, RedHat AS 2.1 and RedHat EL3), Sun Solaris, SGI Irix, MS-Dos, Windows 95/98/NT/XP/2000, TCP/IP, VPN/IPSec, FTP, SSH, SMTP, DNS, HTTP, SSL, RIPv1/v2, EIGRP, Frame-Relay, PPP, HDLC, Radius, Perl, PHP, SQL

Professional experience

10/2002 - Current  Senior System Administrator Autotradecenter Inc, Menlo Park, CA
Responsible for all hardware related to networking, security devices and all servers related to production and development. This included original Sun Sparc hardware running Solaris 7 and 8. In early 2003 Autotradecenter started to migrate to x86 hardware and Linux after evaluating Oracle RAC on Solaris and Linux. Currently I am working in IT team of 4, with me being the only production person operating around 60 servers and 12 blades, including HP StorageWorks SANs which mostly run RedHat EL3 and AS2.1 (Oracle servers).
05/2001 - 09/2002  Network and Security Consultant Autodaq Corporation (now Autotradecenter Inc), Menlo Park, CA
Consulting for Autodaq Corporation to help the company improve their 24x7 presence on the Internet, including such things as redesigning current infrastructure, implementing such redesign, adding new colocation site for failover, improving general setup in regards to DNS, email, email lists, web loadbalancing, SSL offloading, upgrading existing firewalls to new firewalls.
02/1999 - 03/2001  Senior Network Engineer Inktomi Corporation, Foster City, CA
Responsible for day to day operation or supervision of Inktomi's corporate LAN and WAN plus working with several colocations to plan, implement, upgrade and troubleshoot production cluster. Involved in planning new office network to support growing from 250 employees to over 1,000. Responsible for rolling out of a Frame Relay network for small remote offices. Also responsible for coming up with configs for new hardware and order this hardware.
10/1998 - 01/1999  Senior Network Engineer Ibeam Broadcasting, Inc., Sunnyvale, CA
Involved in planning network integration of Ibeam's product for ISP, including Layer 2, 3 and 4 devices in conjunction with their cache server. Worked with vendors to get implementation of APIs to be able to control Layer 4 configurations and failover. 
06/1997 - 10/1998  Senior Network Analyst Silicon Graphics, Inc., Mountain View, CA
Day to day operation of the SGI Mountain View campus including over 40 Cisco 7000, 7206 and 7513 router plus a large number of SGI Irix routers. Responsible for planning and install hardware upgrades of all Campus Cisco 7xxx series routers and to actual IOS versions. Designed new building networks for rewiring projects, which includes gathering of requirements from the customers, then planning and purchasing routers and switch hardware. Involved in the ongoing redesign of the campus networks. 
09/1996 - 05/1997 Senior System Administrator Silicon Graphics, Inc., Mountain View, CA
Responsible in a team of sysadmins for the SGI Mips Group to support the Chip Development. Day to day care of over 150 server machines and over 400 desktop machines. Planned a new 6 terabyte backup system. Planned new 750 gigabyte NFS server for the main databases. Played major role in the planning and executing the move of Mips into a new building with no hardware problems and low downtime. Involved in the ongoing redesign of the campus networks.
06/1996 - 08/1996 System Administrator Silicon Graphics, Inc./Cray Research, Eagan, MN
Hired as help for the SGI and Cray Research merger activities. Helped with the move from a primary Sun Solaris environment to a SGI Irix environment. Rebuilding of the Sun jumpstart mechanism with Irix "inst" program, installing of new SGI Irix server, rebuilding NIS, NFS and mail environment. Involved in debugging of DNS Denial of Service attacks through the Internet. Involved in debugging large mail problems.
11/1995 - 05/1996 System Administrator NCD Z-Code Software, Novato, CA
Maintained the NCD Novato office with around 40 developers, tech support and sales people. Work included the maintaining of over 30 different Unix platforms and release versions, Windows 3.1/95/NT and Mac computers, analyzing and improving the local area network.
1985 - 09/1995 Consultant Germany
Consultant for large and small companies in Germany for all areas of computers and networks.