I am currently implementing a small Spring MVC PoC, and I would like to use JSF as the view technology since most people in my company are used to a J2EE with Primefaces env
Spring MVC and JSF don't really mix. You can use JSF for the view related stuff and have Spring manage and wire the backed (services, daos etc.). But trying to match @Controllers with JSF pages isn't something that really works nicely (next to that both are different stacks request based against component-based).
To integrate Spring with JSF you will need to add the SpringBeanFacesELResolver
to your faces-config.xml. That will lookup beans from Springs application context. For this to work you have to use plain JSF annotations and not the CDI based annotations.