I got my PhD in molecular entomology where I studied insecticide resistance and gene expression in mosquitoes. After I've submitted my thesis (before viva voce and convocation) I went to work in service line in July 2013 (the only option that provide me enough money for my family at that moment) up till now.
Now I wanna apply for postdoc position. I've found an interesting position which study doesn't relate to my PhD work. It does involve molecular works (although I've never conduct those assay before) but the analysis is more on phylogenetic and evolution. I would like to apply for it but I don't know how to relate my previous work (my PhD and current job) to this position. I've read some guidelines in writing Research Interest Statement but all revolve around "previous work > contribution > current work > future work".
For my case, how should write it?? And, is it uncommon for PhD grad to do postdoc unrelated to his previous work? Because it may take a life time to wait for Postdoc opportunity that matches my PhD experience, at least in my region...