Randal L. Schwartz is a renowned expert on the Perl programming
language, having contributed to a dozen top-selling books on the
subject, and over 250 magazine articles. Schwartz is a Dart/Flutter
Google Developer Expert, providing assistance and training. Schwartz
runs a Perl training and consulting company (Stonehenge Consulting
Services, Inc of Portland, Oregon), and is a highly sought-after speaker
for his masterful stage combination of technical skill, comedic timing,
and crowd rapport. Schwartz hosted the successful FLOSS Weekly podcast,
covering Free/Libre Open Source Software by interviewing the project
leaders and legends in the industry. Schwartz serves on the LinuxFund
Board, and formerly served on the boards of the Perl Institute and
Squeak. And he's a pretty good Karaoke singer, winning contests
regularly.

https://youtube.com/channel/UCUDt0S0gfQJ4eLkx66ox5Jg

Podcast producer:

FLOSS Weekly (https://twit.tv/floss)
InSightCruises News-es (https://podcast.insightcruises.com)

Books authored/coauthored:

Programming Perl (multiple editions)
Learning Perl (multiple editions)
Learning Perl on Win32 Systems
Learning Perl Objects References and Modules (multiple editions)
Effective Perl Programming: Writing Better Programs with Perl
Object Oriented Perl
Randal Schwartz's Perls of Wisdom

Magazine articles and columns (over 250 total):

UnixReview Magazine
PerformanceComputing Magazine
SysAdmin Magazine and Website
WebTechniques Magazine and Website
Linux Magazine and Website
The Perl Journal E-Magazine
Apple Developer Works Website

Regular contributor to online forums:

Gitter channels for Dart and Flutter
stackoverflow.com
perlmonks.org (The Perl Monastery)
use.perl.org
newsgroups comp.lang.perl.misc et. seq.
newsgroup comp.lang.perl.announce (moderator since inception)
perl.org mailing lists