Events & Symposium - Symposium - 2017 - Speakers



Speaker Gil Barmwater - <vicepresident (at) rexxla (dot) org>
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 is the Vice President of the Rexx Language Association and is a member of the Symposium Planning Committee.

Speaker Michael Cowlishaw - <mfc (at) speleotrove (dot) com>
Credentials Mike Cowlishaw has worked in both hardware and software design and was 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 a retired 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 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 Terry Fuller - <taf (at)>
Credentials Terry has used Rexx since its release as part of IBM's VM, when he was a VM systems programmer at Teradata. Subsequently he used Rexx both as a VM and an MVS sytems programmer. Since 1997 he has been an independent consultant. Terry is currently occupied with developing a manufacturing management system entirely in ooRexx and making use of ooDialog.

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.
He currently is the President of the Rexx Language Association and is a member of the Symposium Planning Committee.

Speaker Bobby Tjassens Keiser - <tbd>
Credentials tbd

Speaker Thomas Schneider - <ths (at)>
Credentials Thomas is an IT-Consultant with practical experience in various programming languages like FORTRAN, COBOL, C, 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 IMS and/or DL/I to DB2), see, and
Back in 1990, he started to develop PP-123, a generalized Program Preprocessor and Program Transformer, which has never been really completed.
In this talk on RexxLA, he demonstrates the current state and why he has stopped for the time being this development. His current home-page urgently needing an update describing all recent projects of the past years is

Speaker Alexander Seik - <h1051861 (at)>
Credentials Alexander is a student of Prof. Flatscher and currently works as a full-stack developer. He is proficient in Java and wants to add well established and useful tools from the Java world to the ooRexx community.

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 a long career in Databases, Visual Basic, and PHP.

Speaker Uwe Winter - <uwibox (at) uwibox (dot) de>
Credentials Uwe works as system programmer at a health insurance. Before he has been worked for 23 years in the mainframe automation area at EDS/HP. His focus was on integration of legacy REXX code into the own standard environment first based on IBM Netview later on CA-OPS. Beside the job he has finished a study in business informatics with thesis about development of tools for test and maintenance of REXX programs. At home he switched from Windows to Linux and is trying to automate all every day work on PC.