Andretti Autosport and Kingdom Motorsport have both announced changes to their respective management teams as the start of the 2015 IndyCar Series gets closer.

Andretti has hired Rob Edwards, who spent the past five-plus years as team general manager with Schmidt Peterson Motorsports, as its director of race operations and engineering. Edwards replaces long-time team director Kyle Moyer, who moved to Team Penske last autumn.

"We're really pleased with the contributions Rob has made to the team," team co-owner Sam Schmidt said, "Under his leadership, we grew to a two-car team in the Verizon IndyCar Series and scored our first four victories in the ultra-competitive series. We wish him the best in his future endeavours."

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Andretti has three confirmed entries for the Verizon IndyCar Series season, along with entries for both the Indy Lights and Pro Mazda series and team owner Michael Andretti knows the value of landing someone of Edwards' calibre.

"His experience in racing will be valuable in moving our organisation forward across multiple racing platforms," Andretti said, noting that George Klotz will remain the Verizon IndyCar Series team manager.

Meanwhile, Davey Hamilton has been named managing director of Kingdom Racing. The former racer had, for the past two seasons, acted as co-owner of the Schmidt Peterson Hamilton Motorsports team that fielded the #77 car driven by Simon Pagenaud. He will now oversee racing operations and sponsorship for the Kingdom team, which has been involved in the Verizon IndyCar Series since 2008.

"We've accomplished so much over the past seven years and will continue to expand our footprint throughout motorsports in 2015," said Hamilton, who has partnered with Kingdom Racing since its inception, "First off, we will continue our affiliation with an IndyCar team for the Indy 500 and will continue our Miles of Smiles events at various locations around the United States."