Yes you can. Domain transfer is the process of transferring a domain name from one registrar company to another - in this case from your current company (such as GoDaddy, Bluehost, HostGator, etc) to United Methodist Communications.
Domain transfers can be a tricky technique with multiple steps that often take a week or longer to complete. If you are concerned about how long it it will take OR if you prefer a simpler process, you can instead change where your Nameservers point.
It is important to note that your domain transfer DOES NOT THE TRANSFER THE CONTENT OF YOUR CURRENT SITE TO US. A domain transfer only transfers your domain name to us.
Lastly, here are the instructions to transfer your domain: https://umcchurches.org/index.php?rp=/knowledgebase/12/Domain-Transfer-Instructions.html