How can I put simple profile on the bottom of each post ?

Hi,

I tried to make author information(user profile) as me but I could not find out, so please let me know how I can put my info as simple greeting, email and phone address on the bottom of each post automatically.
My site is http://www.realtycontents.com

I attached the example as below link, you can see the part of the bottom on the post,

https://realtycontents.com/End/non-resident-speculation-tax-nrst-1/

Thank you.