Andy G has been using PmWiki since 2003 and started writing skins in 2008.
Skins and recipes he has worked on:
Favourite Cookbook recipes
He is based in Aberdeen in the UK.
He works at a software company called Software Systems: Open For Business, which is a web design and development company in Aberdeen, Scotland.
He has a bad blog at http://www.andygaskell.blogspot.com/ but it does have links to various ways to contact him.