I did it on my own. 

The implementation was completed with the help of a consultant.

We used a RedHat consultant for the deployment of OpenShift.

I didn't work on its deployment. For the on-premise installation, my colleagues worked with the vendor to implement it. We got help from the vendor. 

We manually installed the deployment three months ago, utilizing grid protection systems. I have been handling both development and production environments. In the development phase, I build deployments from scratch, while for production, I collaborate with another vendor. I manage all steps of installation and ensure smooth migration to the production environment.

We used a local vendor to do the implementation and maintenance.

We teamed up with Red Hat's OEM to do the Red Hat OpenShift implementation. So, it was a small team. We just did a waterfall implementation, not agile.

We used a third-party vendor for our implementation, and they were very knowledgeable.

Red Hat did most of it. We just provided them with the bare metal and away they went. It was a very time-bound project, and the Red Hat team was there. Our teams also worked with them. It was a collaborative exercise. On our side, there were 10 to 15 people involved, but there were five key people.

The implementation was completed in-house.

The team we have is small for maintenance and support. We have approximately six people managing the whole platform for the entire department. Earlier on, there were more, but the platform has matured, and then the number of applications the platform used to run is going down because they're being moved to Microsoft Azure and Amazon AWS. We keep the team approximately four people who will manage the platform for the next couple of years for the whole department. After that, everything will be on either Microsoft Azure or Amazon AWS.

The first implementation was done on my own, where I was learning, testing, and exploring. All the documentation is updated on their website.