Download Curriculum Vitae Personal Details Name: Jeroen Vriesman Address

Curriculum Vitae
Personal Details
Name:
Address:
E-mail:
Mobile:
Date of birth:
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Marital status:
Current position:
Jeroen Vriesman
Langbroekerdijk 10
3972ND Driebergen
the Netherlands
[email protected]
++31 (0)613844206
17 Februari 1971
Dutch
single
Freelance Linux specialist
Education and Qualifications
1991-1996:
1990-1991:
1987-1990:
1983-1987:
TU Delft (university) applied physics
TH rijswijk applied physics
MTS electronics
MAVO
Work and Skills Summary
1999-present:
Freelance Linux/Unix projects
1996-1999: Linux/Unix systems administrator
Seven years of experience in Unix/Linux systems administration, network planning
and configuration, programming and testing, main focus is on Linux and security.
Details:
Company
Place
Function
Time/duration
Type
LASER
Zoeterwoude- System
1996 / 1 year
Regular job
Computer
Rijndijk
administrator
Europe b.v
Experian
Den Haag
System
1997 / 2 years Regular job
Nederland b.v.
Administrator
ING Bank
Hoofddorp
CCM
Den Haag
Skills used
Windows support,
novel and Linux
system administration.
Unix / Linux system
administration,
scripting.
Test manager 1998 / 4 months Project where TMAP test
ING bank
management, setting
hired me
up test network,
from
planning tests,
Experian.
managing test team (3
people)
Developer
1998 / 5 months Project where Perl programming,
(Linux / Perl )
CCM hired setting up connectivity
me from
between KPN and
Experian
CCM, cisco, apache,
Linux
Company
Mercedes
Benz
Nederland
Place
Maastricht
Function
AIX systems
administrator
Time/duration
Type
1999 / 6 months Project for
LCI
consultants
Experian
Den Haag
Nederland b.v
Linux systems 1999-2003
administrator
Freelance
projects
AOC Limburg Vucht
Linux systems 2003 / 2 months Freelance
administrator
project
Skills used
Upgrading AIX
HACMP cluster,
oracle database,
planning replacement
of SSA disks.
Setting up disaster
recovery site, active
intrusion detection
systems, firewalls,
cisco routers,
scripting, perl, C.
Setting up LDAP
based imap
mailservers, postfix
* That's the reason I left after only one month.
Programming languages
C, ML, PASCAL
Scripting and markup languages
Perl, Python, bash scripts, awk, html
Server configurations
nfs, nis, dns (bind), mail (sendmail, postfix),
ldap (openldap), imap (courier imap), samba,
raid-systems, clustering, apache, active intrusion
detection (shadow), kerberos, openafs, coda,
dhcp, various databases, complex network
configurations and almost all other common
unix services.
Operating systems
Linux (Redhat, Suse, Debian) on intel and alpha,
SCO Unixware, AIX, Sun Solaris, HP-UX, SVR4.
Networking
Cisco and Ascend router configurations, various
firewall configurations, complex linux networks.
Publications
Howto setup a ldap based smtp/imap server:
http://www.vriesman.tk
Detailed employment history.
August 2003 to September 2003, AOC Limburg.
Linux administrator.
The company Prompt hired me to solve a mail routing problem at AOC Limburg,
working together with one other unix administrator from Prompt we had to setup 3
ldap based mailservers and make a system to route mail based on ldap data,
using Suse linux , running postfix, openldap and courier imap. It was my
responsability to make such a configuration work before the teachers of AOC
Limburg started working.
June 2003 to Juli 2003, Experian nederland b.v.
Linux administrator, network administrator.
Finishing documentation of previous work for Experian and handing over the
administration to the Experian system administration and developers (two IT
managers, five developers and three administrators). I was responsible for detailed
documentation (using Lyx/LaYeX and inline programming with noweb), and
making sure that Experian was able to handle all administrative tasks with respect
to the Unix/Linux servers with nothing more than some phone calls and limited
email support from me. At the moment they don't need my support anymore.
Januari 2003 to June 2003, Experian nederland b.v.
Linux administrator, mail administrator.
Setting up an ldap based mail system using postfix, courier imap and openldap,
running on Mandrake linux with failover, email backup, central storage and
autoresponder. Working on my own and reporting progres to IT management I was
responsible for making a mail system with the requested flexibility for Experian to be
able to synchronize all their accounts and handle lots of different domains,
autoresponders and forwarders. The configuration is documented on
http://www.vriesman.tk and is used by many companies now.
Januari 2003, Experian nederland b.v.
Linux developer.
Programming self-duplicating linux system, a system which duplicates itself when a
new disk is inserted and creates a new partitioned bootable system without any
human interaction, for standby and disaster recovery.
Experian needed a way to keep their standby backup and disaster recovery
systems in sync with production systems. This was done by a set of init scripts which
are capable of completely duplicating a running system and on-the-fly and
partitioning a new (autodected) disk to fit into a software raid system, even if the
new disk is completely different from the disks in the running system.
I programmed it using normal bash shell scripts, developing took one month,
Januari 2003, and it's still used for most linux systems at Experian nederland b.v.
July 1999 to December 2002.
Linux system administrator.
As a freelance linux administrator, working together with a dba and a clipper
developer, I was responsible for setting up Mandrake and RedHat linux servers, for
file serving, print serving, security, web servers, DNS, DHCP, sendmail and postfix
configurations, squid proxie, oracle databases, cisco and ascend router
configuration, and writing and implementing backup and recover procedures. I've
been writing several perl programs and shell scripts.
One of the interesting ongoing projects during this time was setting up and
maintaining an active intrusion detention system, based on shadow and running
on RedHat linux.
This started June 1999 and is still running, the last upgrades were in 2003, in 1999 AID
systems like snort were not as advanced as they are now, so Experian started using
shadow, a linux based AID system which records all packet headers of the IP traffic
going in and out the machines which have an internet connection. The shadow
system is developed by the american navy and uses perl programs to analyse the
traffic. Setting up this AID system involved perl programming and detailed analysis
of ip traffic. Experian makes certain sensitive information available online for banks,
police etc. The security of Experian Netherlands was my responsability, because of
this advanced setup no one was ever able to compromise their security.
February 1999 to June 1999, Mercedes benz.
Working for LCI consultants, together with a dba I was responsible for upgrading
an AIX HACMP cluster with SSA disk cabinets running a large oracle database, this
involved detailed downtime planning and working at night to preserve production
continuity.
July 1998 to December 1998, CCM b.v.
Linux administrator, perl developer.
Together with a dba and a clipper developer I was responsable for programming
a gateway between a large database, which processed information through a
Novell filequeue, and a webserver, included perl (cgi), C (Linux kernel)
programming and solving specific problems of Linux-Novell connectivity.
This project was at CCM, which is now part of Experian, their information systems
worked with an in-house developed clustered database system running on novell
servers, communicating over X.25. In order to make the data available over tcp/ip
they needed linux servers to translate the queued requests to http over tcp/ip. The
project involved setting up linux servers (at that time Caldera was used because of
it's novell conectivity), perl programming and solving linux-novell connectivity
problems with file time-stamps and file-locking, to solve these problems I needed
to debug linux kernel modules.
It's still being used and I've made it into a flexible and failsafe load-balancing
database interface system.
March 1998 to June 1998, ING Bank.
Working in a team of 12 people I was responsible for test management for the
Chipper (chipcard online payment system) project, this included setting up a test
network, managing a test team, making test plans (TMAP) and reporting back to
the developers and project management.
There were two test networks, both with a linux server/firewall, cisco routers and
several windows workstations running the chipper application. Also a complete
understanding of the chipcard payment process was needed to make the test
plans. Besides making the testplans I also had the responsability for the
communication of the results to the developers, programmers, managers and
testers, this was a project with people from very different backgrounds working
under a lot of time-pressure.
Januari 1997 to December 1998, Experian nederland b.v.
Unix administrator, network administrator.
Together with progress dba's and two other system administrators, I was responsible
for daily unix system administration tasks, documentation, backup, internet
connectivity, mailservers and supporting users. A variety of systems was used at
experian and maintained by me, AIX, Unixware, SCO, SVR4, Linux, PDP11, novell
and NT. I initiated and planned and realized the use of linux to cut licence costs,
and reduce system diversity. At the moment linux has become the company
standard at Experian netherlands b.v.
One of the other things I did there, together with an hardware expert is upgrading
their entire network, from coax to 100Mb utp, and documenting it.
Februari 1996 to December 1996, LASER computer europe b.v.
Helpdesk, Linux administrator.
Working in a team of 7 people we were handling support requests from other
companies, planning on-site support, and administrating novell and linux servers,
together we were also responsible for making OEM configurations of windows 95.
Research
Neural network heartbeat analysis.
This was my first research project at TU Delft, computational physics department,
the idea was to measure certain chaotic aspects of ECG's to predict fibrillation by
letting a neural network filter out the ECG itself and analyse the left-over noise. It
involved simulating neural networks and programming the backpropagation
learning algorithm in C, and writing data conversion programs in PASCAL.
It turned out to be unpractical compared to conventional signal analysis. The
project took 3 months and started november 1994.
Measuring the sound-coloring sensitivity of the human ear.
This was done at the acoustic perception department of TU Delft, in order to
design speaker arrays for sound reproduction with localization preservation it was
needed to know the sensitivity of the human ear to sound coloring. This project
involved PASCAL and DSP programming, setting up 2AFC experiments, statistical
analysis, and designing analog filters.
It took 6 months and started februari 1996.
Other skills and interests
Travel:
A two month stay in a buddhist monestry in silent meditation.
Languages:
Fluent in Dutch and English.
Music:
Playing didgeridoo and piano.
Electronics:
Designing electronics, DSP (texas instruments) programming.