Darien-based Genesee & Wyoming has appointed CEO John Hellmann as chairman, following the retirement of Mortimer Fuller III, who had been chairman since 1977, and whose great-grandfather, Edward L. Fuller, founded the company in 1899 with less than 15 miles of track in upstate New York. Hellmann leads a company operating more than 120 railroads and 8,000 employees, having arrived in 2000 as chief financial officer and promoted to CEO in 2007.

Darien-based Remedy Partners has hired Jason Rose as chief product officer, as it develops “episode of care” systems under which physicians are paid for health outcomes, rather than a fee-based model of care. Rose joins Remedy from Inovalon, where he was executive vice president and chief strategic development officer. He holds a master’s degree in health services administration from George Washington University and has a bachelor’s degree from Radford University.

Lawley, one of the largest independent insurance brokers in the United States with offices in Darien, expanded its presence in New York, New Jersey and Connecticut with the partnership of employee benefits broker MAC Creative Plan Solutions, in Mahopac, NY. The new relationship, which became effective June 1, created Lawley’s 10th branch across the tri-state area and will formally operate under the Lawley brand.

MAC Creative Plan Solutions, which was founded in 2001, specializes in employee benefits and custom employee communications. In addition to the new Mahopac branch, Lawley has offices in Darien, Florham Park, N.J., Purchase, N.Y., and Melville, N.Y., circling the New York City market.