The moves are effective immediately.
"The addition of Alfa Romeo to (Bigland's) portfolio of responsibilities is an indication of how committed we are to the establishment of this brand in the North American market, a process that has already started with the introduction of the Alfa Romeo 4C," FCA CEO Sergio Marchionne said in the statement.
"Much more is expected from this brand in the next few years as outlined in our five-year plan presented on May 6, 2014, and Reid's seniority and experience are ideal for the significant task that is now getting underway."
Alfa Romeo withdrew from the U.S. in 1995 when the 164 sports sedan reached the end of its production run, ending a presence in North America dating back to the 1950s.
In May, Marchionne said the company plans to invest $6.9 billion (5 billion euros) to overhaul Alfa’s lineup and position it as a competitor to BMW, Audi, Cadillac and other sporty luxury brands.
Last year, Alfa Romeo sold just 74,000 cars globally, the lowest level since the 1960s. Marchionne’s ambitious growth plan for Alfa calls for volume to reach 400,000 globally by 2018, with the United States becoming one of the largest markets.
A new midsize sports sedan is due in the U.S. by 2016, and seven other new Alfas are in the company’s five-year plan.
Hegbloom’s major challenge will be to establish the Ram brand in the commercial market and compete with General Motors and Ford. Ram is launching two vehicles, the ProMaster full-size van and the ProMaster City, a small utility van, to compete with the Ford Transit Connect.