You need to set the proxy server in eclipse by going to preferences and setting the proxy server your company uses.

If you don't know your proxy server and are using windows run cmd as administrator and execute this command.
netsh winhttp show proxy
If you are using another OS Google is your friend, but you need to set the proxy server in network connections of preferences dialog located in windows -> preferences of eclipse and search for proxy.
Another option is to set proxy in your home directory /.m2.settings.xml here is an exmaple
https://www.mkyong.com/maven/how-to-enable-proxy-setting-in-maven/