 porterbrook today announced that zena dent is to leave the business in july for a new role at west midlands trains zena joined porterbrook in 2016 in her most recent role as product development director zena created a number of project teams capable of delivering self contained turn key enhancements to existing rolling stock such as the wsp and flex projects mary grant porterbrook ceo said id like to thank zena for her contribution to the business and congratulate her on the new role our industry needs good people to focus on the efficient introduction of the large amount of new rolling stock coming onto the network in coming years zenas legacy at porterbrook is the team of innovative engineers who contribute so much to our over all asset management strategy at west midlands trains zena will join the transformation team overseeing the introduction of new build emus 