Arjen Lentz

Current

Founder at Open Query
Project Lead at MozOO.org
Technical Editor at Various publishers (O'Reilly, Pearson, McGraw-Hill, ...)

Conference Presenter at Various events

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Past

Director at Open Source Industry Australia, Ltd.
Owner at Lentz Internet Services (Sole Proprietorship)
Support Engineer at MySQL AB

Trainer at MySQL AB
Community Relations Manager at MySQL AB
Technical Writer at MySQL AB
Owner at Lentz Software Development (Self-employed)
ISDN Sales Engineer & Marketing at CCG

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5 more...

Recommended

40 people have recommended Arjen

Connections

500+ connections

Industry

Information Technology and Services

Websites

Arjen Lentz’s Summary

Open Query offers MySQL expertise through training and consulting. As we value our customers, we work for reasonable rates. If you are in need of our services, please contact me through LinkedIn's InMail or via openquery.com.au
If it's an urgent issue, you may also try Skype (arjenlentz).

Arjen Lentz’s Specialties:

MySQL training, performance tuning and best practises,
Open Source licensing, strategy and business models,
Blending technology and people.

Arjen Lentz’s Experience

Founder

Open Query

(Privately Held; 1-10 employees; Information Technology and Services industry)

September 2007 — Present (11 months)

Open Query (http://openquery.com.au) offers Enterprise Data Management using Open Source Tools and Knowledge, through

- Workshops & Training - Small interactive classes using materials developed by Open Query, always relevant and up to date.
- Remote & on-site Consulting

We focus on MySQL and PostgreSQL, with particular expertise in design, performance tuning, replication and clustering, data warehousing and business intelligence. All you need!

We charge reasonable rates, as we feel it most important to build an ongoing relationship. Our training and consulting is focused on giving you the additional information and skills you need to help yourself. If you don't have the staff internally, we can also provide remote services to support you when needed.
Project Lead

MozOO.org

(Non-Profit; Computer Software industry)

September 2003 — Present (4 years 11 months)

MozOO.org (http://mozoo.org/) is a set of productivity tools for Windows. It is specifically aimed at home and small business users who "just want to get on with work".
MozOO.org demonstrates a pragmagic view of "marketing" Open Source through a complete practical solution with a narrow focus.
Technical Editor

Various publishers (O'Reilly, Pearson, McGraw-Hill, ...)

(Publishing industry)

August 2001 — Present (7 years)

Tech editing for a number of books, most specialising in MySQL.
Conference Presenter

Various events

(Information Technology and Services industry)

August 2001 — Present (7 years)

I frequently speak at conferences, seminars, forums and user groups, including tutorials and keynotes. Main topics are MySQL related, also open source business and development models.
OSCON, MySQL Users Conference, LinuxTag Germany, International PHP Conference (Frankfurt), Open Source Database Conference (Frankfurt), LinuxConfAU (AU/NZ), LinuxWorld Sydney, Sydney Open Source Forum, Tasmania Open Source Forum, System Administrators Guild of Australia (SAGE-AU(, Australian Computers in Education Conference (ACEC), Dutch Unix Users Group (NLUUG) Spring Conference, System Administrators & Network Engineers Conference (SANE - NLUUG/USENET), ...
Director

Open Source Industry Australia, Ltd.

(Non-Profit; 1-10 employees; Information Technology and Services industry)

January 2004 — May 2008 (4 years 5 months)

Founding director of OSIA (osia.net.au). OSIA is the national industry body for Open Source within Australia, furthering the cause of both Free and Open Source Software (FOSS) in Australia and to help the members to improve their business success in this growing sector of the global Information and Communication Technology (ICT) market.
Owner
Lentz Internet Services (Sole Proprietorship)

(Sole Proprietorship; 1-10 employees; Information Technology and Services industry)

February 2004 — August 2007 (3 years 7 months)

Advises on Open Source and related Business, Intellectual Property and Licensing questions.
Support Engineer

MySQL AB

(Privately Held; 201-500 employees; Computer Software industry)

August 2006 — June 2007 (11 months)
Trainer

MySQL AB

(Privately Held; 201-500 employees; Computer Software industry)

August 2001 — June 2007 (5 years 11 months)

(MySQL employee # 25)
MySQL Trainer in Australia and New Zealand.
Business development in Australia.
Community Relations Manager

MySQL AB

(Privately Held; 201-500 employees; Computer Software industry)

October 2004 — July 2006 (1 year 10 months)

This job involved cool stuff like jet-lag, hanging out with MySQL users everywhere and drinking assorted beverages on company time. Developed planetmysql.org as a key community medium. Program chair for the MySQL Users Conference 2005 and 2006 (1650+ attendees, 130+ talks with 8 parallel tracks over 4 days).
Technical Writer

MySQL AB

(Privately Held; 51-200 employees; Computer Software industry)

August 2001 — October 2004 (3 years 3 months)

(MySQL employee # 25)
Technical Writer in charge of the MySQL manual.
Publication of the MySQL Manual through O'Reilly.
Owner
Lentz Software Development (Self-employed)

(Self-Employed; Myself Only; Computer Software industry)

February 1990 — June 2000 (10 years 5 months)

Software Development and Consultancy.
Specific expertise in data communication over public networks.
ISDN Sales Engineer & Marketing

CCG

(Privately Held; 1-10 employees; Telecommunications industry)

1995 — 1997 (2 years)

Additional Information

Arjen Lentz’s Websites:

Arjen Lentz’s Interests:

MySQL, PHP, C, OSS Community, conference organisation, licensing, development methods and processes, business models and strategy/marketing, technology education, psychology, cooking, gardening, sustainable development

Arjen Lentz’s Groups:

Open Source Developers conference 2007 (osdc.com.au)
Founding director - Open Source Industry Australia (osia.net.au)
Press team - Linux Australia (linux.org.au)
MySQL User Group Brisbane (mysql.meetup.com/84)
MySQL Guilds (Writers,Experts,Speakers, dev.mysql.com/guilds)
FidoNet (long time ago - The-Box, Xenia, Hydra)