I have worked at LzLabs as a software developer since 2016, where I am responsible for COBOL and PL/I compiler runtime development and compiler integration, and legacy C370 runtime implementation. Before LzLabs, I worked for IBM for close to 20 years, working on the lowest level guts of DB2 LUW. I spend too much of my free time, when I can find it, enjoying recreational mathematics, physics and engineering studies. You can find free pdfs of (latex based) class notes for many of the courses that I have taken at http://peeterjoot.com/writing/