Based at Freelance, London, LA
Daily fee $500 to $10,000
Career highlights Postmyer has worked with all the big commercials directors including Mehdi Norowzian, Walter Stern, Bob Giraldi, Frederic Planchon and Tony Kaye. She has also worked on music videos including Stephane Sednaoui's Bjork video filmed on the back of a truck and Danny Boyle's Iggy Pop promo.
Would you believe Stephane Sednaoui wouldn't take no for an answer when he requested Postmyer for a job - despite the fact that she had a ten-week-old baby. A single mum, she had to bring him into work where he lay in a box on her desk.
What are people saying "I believe Lina is a director's dream as a line producer. She is creative, she is not afraid of any challenge given her and she can solve problems with grace, Carol Case, the managing director/partner at CaseGiraldi Media Co, says. "Directors and agencies alike feel the same."
Based at Spectre, London
Daily fee £4,000
Career highlights Frankel began as a production assistant for The Paul Weiland Film Company, eventually producing for Frank Budgen, Paul Weiland and Mike Stephenson. Highlights include VW's "UFO and Virgin's "Grim Reaper". He now produces for Danny Kleinman and has produced new work for Xbox and John Smith's.
Would you believe Frankel's first job was an unmitigated disaster, involving floods, the firebrigade, fights with the paparazzi and Naomi Campbell throwing tantrums. Frankel thought it would be his last job.
What people are saying "Johnnie has got a great reputation. He's efficient and organised but also enthusiastic and full of energy. He's lively, bubbly, one of the lads, Paul Silburn, the creative group head at TBWA/London, says.
Based at Hungry Man, New York
Daily fee $950
Career highlights Byrne began as a freelance before producing at Sandback Films. For the past four years he has produced for Hungry Man directors including Bryan Buckley, John O'Hagan and Hank Perlman. As Buckley's full-time producer his work includes Dr Pepper's "emergency", and ads for E-trade and Visa.
Would you believe A famously unassuming family man, Byrne's job drags him into a life of glamour, including memorably being woken at 3am one morning by Slash from Guns 'N' Roses.
What people are saying "This man has three heads: a director's head, a creative head and a budgetary head. In our experience, all are equally important to him. Practical and down-to-earth in his approach, he enjoys making it happen, Yan Elliott, a creative at Mother, says.