Guillaume Laforge is an Open Source developer who manages and works actively on Groovy, the agile and dynamic language for the JVM. He is the lead of JSR-241 whose role is to specify this new language. He is also the Groovy Project Manager. Along with Dierk Koenig, he co-authored "Groovy in Action" for Manning.

Guillaume Laforge is the Vice-President Technology of G2One, the Groovy and Grails profesional services company.