Events & Symposium - Symposium - 2013 - Speakers

The 2013 International Rexx Symposium
05-08 May 2013
Raleigh-Durham Area, North Carolina

Sponsored by the Rexx Language Association


Speaker Gil Barmwater

Gil Barmwater is a retired independent computer consultant who has used Rexx since it first became available within IBM. In addition to programming Rexx in the mainframe environment, he has developed Rexx solutions on OS/2 and multiple versions of Windows.
He currently is the Vice President of the Rexx Language Association and is a member of the Symposium Planning Committee.

Speaker Frank Clarke

Retired IBM PL/I programmer learned CLIST in 1973 and REXX in 1988. He has been building utility software for programmers since 1973.
After retiring from IBM, did contract programming at GE Data Services where he helped construct a major application in REXX. Y2K contracts with EXXON and Philip Morris. Now employed at The Nielsen Company (yes, the TV ratings 'Nielsen').
Founder of TARPA, the Tampa Area REXX Programmers' Alliance

Speaker Mike Cowlishaw

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 retiredIBM 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
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 Mark Hessling
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 Virgil Hein
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 Complier, Virgil is closely involved with a variety of REXX activities both inside an outside of IBM.

Speaker Marc Irvin
Credentials Marc Vincent Irvin is an IT Contractor who builds REXX tools for IT Security, IT Systems, and workstation support. Marc's career straddles all areas of computing. He’s system programmed VM, zOS, VSE, USS, CICS, IMS, and OS2 platforms. Identity managed RACF, ACF2, Tandem, DB2, Windows AD, CMS, TSO, MSA, and Unix. He’s developed applications using REXX, ALC, APL, EXEC2, CLIST, C, and Java. Marc has been a REXXLA member since the 1991 Asilomar CA Symposium. Marc currently devotes his down-time to building "SpaceBooks" to assist internet subscribers intellectually, politically, and spiritually using a REXX based Natural Language Expert System Inference Engine.

Speaker René Vincent Jansen
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 a Linux or MacOSX system (because like Rexx, unix just works). He plays rhythm guitar in the Scones. He currently is the President of the Rexx Language Association and is a member of the Symposium Planning Committee.

Speaker Les Koehler
Credentials Before his retirement from IBM after 37+ years, Les was a mainframe (VM) application and tools programmer. First at Research Triangle Park, NC and then with the "Special Planned Products" group that offered time-sharing computing from new facilities in Tampa FL after the IBM/Justice Department Consent Decree expired.

Les has presented at previous Symposiums many times. He is our RexxLA Secretary/Treasurer and has used the tools he developed to help him write the code to process RexxLA Membersip Applictions and Payments.
All data is maintained by ooRexx code as a Properties file to make it easy to maintain, query and update.