In RHEL 6 there is no package for Apache Maven 3 and if you search the official repo you will end up with.
But that package does not contain any maven binaries. So since there is no official package and I do not want to clutter my RHEL installation, by adding custom repositories, we will do it manually. And that is no big thing.
First download the apache maven binaries, I downloaded the zip file. And extract it in /usr/share.
Now "install" it, i.e. create a soft link.
And finally set all needed environment variables in /etc/environment. And for my RHEL 6.3 machine they look like this.
Now test your installation of Apache Maven 3.0.4.