Formula To Combine Cells To Build Email Address

I have a worksheet with three columns. First Name, Last Name and email address. I need to combine the first name with the last name and add our @ourcompany.com to the end of it for the emaill address.

I've figured out how to do that, but my problem is, we don't use our first and last names in the email address. We use first initial and last name.

I know how to make Tom Jones become tomjones@ourcompany.com

What I need to know is how to make Tom Jones become tjones@ourcompany.com.

Can someone point me in the right direction here? I just need the first initial of the first name and combine that with the last name and then add in the @ourcompany.com.