Energy Transfer interview questions

1st interview - onsite - group paneling. Very engaging. When I left felt I hit a home run. Especially being told some people turned down job due to site look. I was asked questions about my resume and some technical questions. 2nd interview - online. group setting. more technical questions. Was told after interview regardless I would here back from HR and never got a call or email. I sent email to HR rep who was very responsive during the interview process and after nothing. Bummer team was nice, the office space looked filled of asbestos and pretty much working around chemicals and gas.

*Over the course of nearly 3 months* Three phone interviews with hiring manger that lasted 30-60 minutes and consisted of behavioral and problem-solving questions. One on-site interview that lasted four(!) hours. Spoke with the original hiring manger, their boss (Director), and a panel of employees from the IT department. Combination of questions that involved my background/experience and normal conversational dialogue between parties. Very confident in how interview played out. I followed up a week after on-site interview to for any updates. 2 months had passed without any word from hiring manager. They had eventually reached out and asked for a phone call. After providing availability and following up once again a week after that, no response. I fully understand if company decides to go a different route, but the lack of professionalism of the manger to not communicate is what disappointed me, especially considering the fact that a current employee had referred me for this role.