If your jobs require that you must connect over a wired connection then you probably should avoid any form of WiFi from your Internet connection. This would mean no access point whatsoever.
However, if you have WiFi using WPA2 (PSK) encryption with a good long random character string for the pass phrase, made up of a mixture of upper and lower case letters, numbers and punctuation, then it should be more than secure enough.
If you cannot use WiFi at all for security reasons, then Powerline networking is also out as this is effectively a form of WiFi over the power wiring, and uses a lower encryption standard than WPA2 WiFi.
If your employer(s) demand secure connections, then you should be using a VPN from your computers to the office(s). These are secure networks specifically between your computers and corporate gateway VPN servers and not what many people refer to when they are talking about connecting over a VPN to a proxy server. The remote end of each such VPN is connected into the company's corporate network, and is never exposed to the Internet after it passes through the remote VPN endpoint. Using remote client server connections such as provided by Citrix can provide such a connection, and also it means that the company's data is never actually stored locally on your own computers but is always held safely on the company's premises. Before I retired I used such a system for years to work from home.
Such an approach has the advantage that all your data is available if you have to log on when you are in the office. Also, you can still use the same computers for private access to the Internet if necessary.
With such a VPN running over a WiFi connection, the WiFi link is double encrypted by the VPN and by the WPA2 encryption of the WiFi link. It would take a hacker thousands of years to crack both levels of encryption. Also, using a VPN means that any wire tap will only see encrypted information, and having the data stored only in the company premises prevents any break in to your home allowing a thief to remove your computers and any secure data they are holding.
I hope this helps.