I have two github accounts, one of this was created a log time ago in my work, and has an username that refers to the company where I work.
I have another one that is my personal github account that I can't stop use. Could I merge the two accounts to work in only one of these?
Merging 2 accounts is not possible at github, you can transfer ownership to your personal account.
goto >> Setting >>Transfer ownership
For more details : https://help.github.com/articles/merging-multiple-user-accounts/