The 2007 International Rexx Symposium
30 April - 3 May 2007
Tampa, Florida, USA

Sponsored by the Rexx Language Association


Speaker David Ashley - <wdashley (at)>
Credentials 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 the Project Administrator for the ooRexx 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.

Speaker Frank Clarke - <mvsrexx (at)>
Credentials 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.
Married 39 years to Norene; 3 daughters and 4 grandchildren.

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 Rony G. Flatscher - <Rony.Flatscher (at)>
Credentials He 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 George Fulk - <fulkgl (at)>
Credentials In his 26 years with IBM, George has always worked in software development/support. Although he spent a number of years in OS/2 support just prior to his current job responsibility of supporting the IBM REXX Compiler and Library, he has many years of earlier work experience in compilers. He has programmed in REXX for years and has a solid background in both the use and technology of IBM REXX. In his current position he has presented at the REXX "track" at the past two SHARE conferences, presenting on both the REXX Compiler and Object REXX.

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

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 René 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).

Speaker Les Koehler - <vmrexx (at)>
Credentials Before his retirement from IBM after 37+ years, Les was an 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 after the Consent Decree expired.
Les has presented at previous Symposiums many times, finally breaking out of the dinosaur age of foils and an overhead projector to using a PC at the 25th Annual Symposium in Germany in 2004.

Speaker Rick McGuire - <object.rexx (at)>
Credentials Rick was the developer charged with integrating Mike Cowlishaw's original Rexx interpreter into VM/CMS back in 1982. From 1982 until 1995, Rick was IBM's lead architect for Rexx issues and principal developer of the Classic Rexx and Object Rexx interpreters for OS/2. Since 1995, Rick has been heavily involved in IBM projects involving programming languages, including 3 years as a member of IBM's Java Virtual Machine development team.

Speaker Morten Mork - <mork.morten (at)>
Credentials Morten works for a Norwegian downstream oil company. He started with Rexx for VM in the 80's. He began as an operator, and is now working with security, communications and Web technology. He is not a programmer, but has used Rexx for automation.

Speaker Lee Peedin - <lee (at)>
Credentials Lee is Vice President of Research and Development at Safe Data, Inc. - a North Carolina corporation that specializes in providing both web and telephony data collection and dissemination services to the agriculture and home-care/hospice industries. Lee first used Rexx under OS/2 in 1997. Much of Lee's work involves the creation and use of external libraries and tools available to ooRexx - Rexx/SQL, Microsoft Office Automation with ActiveX/OLE, BSF4Rexx, and the RxVB.PrinterObject, an ActiveX dll that provides full printing capabilities to ooRexx on the Windows OS.

Speaker David Ruggles - <david (at)>
Credentials David is the Senior Network Engineer for Safe Data, Inc. a data collection and warehousing company in eastern North Carolina USA. David was exposed to and started using ORexx in 1999 and has developed CGI web applications on Microsoft's IIS webserver using ORexx and ooRexx, recently he has been developing Multi-threaded TCP/IP Client/Server solutions used for telephony IVR systems.

Speaker Freddy Sonnemans - <fso (at)>
Credentials After 25 years in development and management functions, Freddy created in 1997 his own company DLS Systems bvba. Since then, he is focusing on cross-platform automation and training. At DLS Systems, he created 2 commercial REXX applications for zOS(Change Management for OPS/MVS & Software Distribution thru OPS/MVS).
Last Updated: 10 Apr 2007 by <> Copyright © 2007 Rexx Language Association, <>