Pinsent joined the company 18 months ago and was previously social and content lead. He will report to group chief executive and founder Steve Ellis, overseeing a team of about 60 people in the London office.
Asked about plans for Metia, whose clients include Microsoft, Bell, the AA and the British Chambers of Commerce, Pinsent told PRWeek: "It’s about getting more of our client base using more of our services, and bringing more clients in.
"Whether a client comes to us wanting a website built or an app made, or a PR campaign, we’ll try and introduce them over time [to other services] by doing a great job."
He said the focus on b2b would remain. Pinsent said: "Traditionally we’ve been very strong in the technology sector and I believe there are other areas of business-to-business that we could very easily apply ourselves to."
Asked which kind of sectors could be targeted, he said: "Anything."
"We’ve got a very strong client base in technology, with companies including Microsoft and Dell. We’ve also got a history working in the financial services technology industry. I believe it’s very obvious for us to move into broader professional services in business, whether financially related or consultancy businesses to helping professional services firms market themselves more effectively."
He stressed that PR is "always going to be part of our offering".
"I believe it’s a key aspect of the work we do and it’s an important model in a world where all our clients are talking about getting better at content marketing."
Metia was founded by Ellis 26 years ago and currently has offices in Seattle, Austin, London and Singapore.