Being forced to install anti-virus, which one to pick?

I will soon be transitioning into a freelance role at my company using my own device. To comply with my contact I’m being told I have to install anti-virus software on my MacBook. I know the general opinion is that macs don’t need antivirus. I’ve been through all the reasons why, I’m just looking for advice. Is installing antivirus software risky and will it slow down my mac? If I absolutely have to install the software for my contract, which should I choose! Thanks!