I am employed by IBM on a full-time basis and am available for consulting.
I can do the following on most variants of UNIX:-
- userlevel programming
- changes to libc
- kernel-level programming
- AIX kernel implementation
- Debugging PowerPC panics [without a symbolic debugger]
- root-cause analysis of panics
- generating race conditions to verify enhancements and.or isolate memory leaks in the kernel.