Lillistone has been appointed as East London area director, while Maresca has been appointed as the North London area director.
Their responsibilities include offering local and national developers land and new homes solutions including the finances of marketing and selling homes.
James Poynor, managing director of Countrywide land and new homes, said: “It has been an exciting year for Countrywide land and new homes, including the exclusive joint UK-wide venture with CBRE and the launch of the Countrywide new homes advisory service.
“We look forward to developing our offering even further in 2012, so I am absolutely delighted to welcome Steve Lillistone and Jason Maresca to the team as they are both extremely driven and dedicated professionals, with a real passion for property.
“Jason and Steve are joining us with a strong track record of success and substantial industry experience and I know that they are both very excited about building strong relationships with developers and keen to get stuck in and help us expand our land and new homes business.
“The roles will involve working closely with developers and house builders of all scales on land and new Homes sites across London and the Home Counties, areas which Steve and Jason know extremely well.”