The agency has appointed former George P Johnson producer Jess Littman as senior producer and account manager and is set to recruit two further members of staff at the start of July.
Littman worked at GPJ for 11 years on accounts including IBM and Cisco.
The new recruits will take numbers at Line Up to 18, working across experiential, logistics and video.
Littman’s appointment is part of the agency’s plan to set up a dedicated three-strong new business team.
Line Up’s head of experiential Rupert Cheswright will also be on the team, along with a logistics-focused member of staff, to begin next month.
Acting managing director Rob Leach said: "We are trying to design in some capacity so we have got really good people to look at pitches. We are hoping to bring in new business sectors, including pharmaceutical and financial.
"The ambition is to grow by 10-20 per cent over the next year and see a steady, but positive growth and focus on profitability."
The agency has also hired former Bournemouth University student Rebecca White as assistant logistics manager after she spent a year with the agency on a work placement basis.