Events & Symposium - Symposium - 2009 - Speakers

The 2009 International Rexx Symposium
18th - 21st May 2009
Chilworth Manor, nr Winchester, UK

Sponsored by the Rexx Language Association


Speaker Mike Cowlishaw - <MFC (at)>
Credentials Mike Cowlishaw has worked in both hardware and software design and is currently leader of the IBM decimal arithmetic initiative. He has long been interested in the human aspects of computing, including the Rexx programming language, color and language perception, text processing, cognition, and decimal arithmetic. He is an IBM Fellow, a Fellow of the Royal Academy of Engineering, and is a Visiting Professor in the Department of Computer Science at the University of Warwick. For more detail, google 'mike cowlishaw'.

Speaker Gil Barmwater - <vicepresident (at)>
Credentials Gil Barmwater is an independent computer consultant who has been using Rexx since it first became available within IBM more than 25 years ago. In addition to programming Rexx in the mainframe environment, he has been developing Rexx solutions on OS/2 and multiple versions of Windows for the past ten years.
He currently is the Vice President of the Rexx Language Association and is a member of the Symposium Planning Committee.

Speaker Rony Flatscher - <rony.flatscher (at)>
Credentials Rony works as a professor for Business informatics ("Wirtschaftsinformatik") at the Vienna University of Economics and Business Administration (Wirtschaftsuniversität Wien) and uses Open Object Rexx for teaching Business Administration and MIS students the object-oriented paradigm, as well as remote-controlling (automating) Windows and Windows end-user applications (e.g. MS Office, Open Office) as well as Java and Java applications.
Speaker Mike Protts - <mike.protts (at)>
Credentials Mike Protts has worked in the IT industry since 1987, and has been programming in Rexx for the majority of that time.  He has made contributions to various open source projects including Regina Rexx and Rexx/CURL.  He is currently studying for an MA in Online and Distance Education with the Open University, and is involved with their Certificate in Web Applications Development.  Mike was born in London, but now lives in Somerset, UK.
Speaker Simon Nash - <(at) >
Credentials Simon Nash was the original architect and developer of Object Rexx. He is an active member of the Apache Tuscany open source project, building an implementation of Service Component Architecture (SCA). He is also involved in the SCA standardization work at OASIS. He was an IBM Distinguished Engineer until his retirement in October 2008 after 34 years of service.
Speaker Mark Hessling - <mark (at) >
Credentials Mark has significant involvement in several Rexx-related Open Source projects including the Regina Rexx interpreter and THE (The Hessling Editor). Mark is the author of several Rexx external function packages, such as Rexx/SQL, Rexx/DW, Rexx/gd, Rexx/CURL, Rexx/Curses, Rexx/Trans, Rexx/Wrapper. Mark is also the current principal maintainer of The Regina Rexx Interpreter, and Rexx/tk. In his spare time, Mark is the Webmaster for RexxLA, and is a Volunteer Fire Fighter.
Speaker David Ashley - <wdashley (at)>
Credentials David is the project leader for the ooRexx Project. David has over 15 years experience with the Rexx language and writing external function packages for Rexx. He is the author of the OS/2 GammaTech Rexx Superset/2 product and many shareware and freeware packages.
In addition, David has extensive experience in the open source community and is the project leader for three SourceForge projects: Mod_Rexx, GTKRxDlg, and OS2Linux. David is also a developer on the OpenHPI project.

He has worked on projects using everything from embedded processors up to large IBM mainframes. He has over 20 years of software development experience using multiple architectures, development environments, tools, and operating systems. He works for IBM Lab Services as a System P consultant.

Speaker Virgil Hein - <vhein (at)>
Credentials Virgil has been with IBM for 38+ years working in software development. In his current position as an IBM Business Manager he is responsible for all facets of a set of mature technology products. This includes responsibility for strategy, business management, development, marketing, sales, service, and support. Main products include Office Vision products, BookManager, REXX, and OS/2. In this position the main goals are focused on maintaining/increasing customer satisfaction, supporting customer efforts to migrate to follow-on solutions, and finding creative means of increasing mature/growth product revenue. As the product owner for the IBM REXX Compiler, Virgil is closely involved with a variety of REXX activities both inside and outside of IBM.
Speaker René Vincent Jansen - <rvjansen (at)>
Credentials René has used Rexx since it appeared in TSO Extensions in the second half of the eighties when he was a systems programmer at the Central Bank of The Netherlands. He is an independent consultant since the turn of the century, specializing in models and meta models in order to rationalize data governance and model driven development. He likes to program in any language as long as it's Rexx, preferably on an Apple system (because like Rexx, it just works). He plays rhythm guitar in the Rolling Scones, and in particular likes Fender Telecasters.
Speaker Brian Marks - < (at) >
Credentials Dr. Brian Marks led the standardization effort for the Rexx Language in the ANSI/ICITS subcommittee.
Speaker Thomas Schneider - <ths (at)>
Credentials Thomas is an IT-Consultant with practical experience in various programming languages like FORTRAN, COBOL, PL/I, REXX and NetRexx. He is the author of Rexx2Nrx, the classic REXX to NetRexx Converter (see, and DB-123, a tool for Database Transformation (for instance IBM DL/I to DB2, see
Speaker Steve Swift - <Swifty (at)>
Credentials Swifty has been writing REXX programs since about 6 months after MFC released it to the IBM audience. He dreams in rexx.
Speaker Jon (Sahananda) Wolfers - <jon.wolfers (at) >
Credentials Jon met Rexx on CMS back in the 1980's whilst working for British Airways. He trained TPF programmers in the '"new" language. For the last nine years he has been developing & maintaining Retail Applications using Rexx on Windows for the trading arm of a small Charity using Personal Rexx & later Object Rexx.
If he had any spare time he would spend it meditating, playing the Guitar or the Piano.
Speaker Robert John Wilson - <robert.john.wilson (at)>
Credentials Rob is an independent IT consultant who met Rexx at IBM working on the INFOMAN product. He is an ardent NetRexx and Java user for a number of years already, after long career in Databases, Visual Basic and PHP.