Portsmouth have announced that Jobsite will be their new shirtsponsor for the next three years.
Online recruitment site Jobsite will be the new sponsor, with the logo appearing on all first-team shirts, training wear and replica kit.
As part of the agreement, the Fratton End will now be known as the Jobsite Stand.
Jobsite chief executive officer Keith Potts said: 'Portsmouth Football Club is closely aligned with our brand values; they're a down-to-earth, straight-talking, hard-working club who are renowned as having some of the best fans in football.
'They're also our local club and we're extremely proud that they're in the Premier League. We're excited to be their shirt sponsor and to be supporting them as the new season starts.'
Pompey chief executive officer Peter Storrie said: 'We're delighted to welcome Jobsite as our new main club sponsor. This represents the biggest sponsorship deal in the club's history.
'We have been impressed by Jobsite's attitude and approach to supporting the club and believe that they will be a great partner.
'Jobsite are joining at an exciting time for the club and we look forward to building a close working relationship with them.
Paul Bell, Pompey's commercial director added: 'From the initial conversation with Jobsite it was clear that they were serious about extending their brand awareness campaign into new ground to reach more consumers.
'Becoming the main sponsor at Portsmouth Football Club will help them to reach significant audiences both in the UK and worldwide.
'Innovative marketing activity has seen Jobsite become a leader within the recruitment sector and we are excited about working with them over the next three seasons to help deliver their brand and business objectives.
'We are a progressive football club and strive to work with like-minded, forward-thinking brands. With Jobsite we have found a fantastic partner.'
The deal is said to be worth more than the £4 million paid by OKI for the shirt sponsorship.