Short Answer is NO, you don't need a project manager. In fact, one of the most common mistakes made by companies implementing Ivanti Neurons for ITSM/ITAM aka Ivanti Service Manager (HEAT) is to assign a Project Manager.

https://ivantiservicemanagerconsultant.wordpress.com/?p=2425

Don't get me wrong, there are many great project managers out there and there is a need for project manage for many hardware type of implementations and large scale software development.  For Ivanti HEAT Neurons ITSM however, one of the biggest mistakes you can make is assigning a Project Manager.

From 26+ years Ivanti HEAT ITSM Implementation experience and 100+ Ivanti HEAT Neurons implementations globally for Fortune 500 and Global 500 companies in the UK, EU, Australia, New Zealand, APAC, Asia, Canada, and the USA, I can tell you without a doubt that less is more, and 99% of the time, project managers are not needed and typically get in the way of getting things done.