BOSTON —Solomon McCown & Company has hired Nicole Caravella, formerly Boston Mayor Marty Walsh’s press secretary, as an account supervisor. Caravella and will focus on clients in the real estate and nonprofit sectors as well as public policy. Before her two years with Walsh, Caravella worked for US Rep. Joe Kennedy III, former Secretary of State John Kerry when he was US senator and US Rep. Paul Hodes.

WASHINGTON — Health policy expert Jennifer Sunshine has joined APCO Worldwide as a director in the agency’s Washington healthcare practice. Prior to joining APCO, Sunshine spent several years with Booz Allen Hamilton’s healthcare practice, assisting clients on legislative and regulatory matters, external communications and advocacy. Before that, she spent more than four years supporting the State Exchange Group, now known as the State Marketplace Insurance Programs Group (SMIPG), on developing business and regulatory requirements for state-based Exchanges.

NEW YORK — Marathon Strategies has hired three senior communications and public affairs leaders, bolstering its  teams in New York and Washington. James Atkins, formerly of Burson-Marsteller, and Joshua Baca formerly of DDC Public Affairs, have joined as managing directors. Anthony Hogrebe, formerly of the New York City Economic Development Corporation, has been appointed senior VP.  They join founder Phil Singer and managing director Jane Hardey, on the firm’s leadership team.

ANNAPOLIS, MD — Crosby Marketing Communications has added two new members to its staff  — Donald Ritchey as information technology specialist and Britany Hubbard as a contract and financial analyst. Ritchey has worked as a contractor for the Department of Veterans Affairs and AT&T in various IT roles. Hubbard most recently worked for Irving Burton Associates as the financial manager for a portfolio of Department of Defense/Defense Health Agency contracts handling subcontracts, vendor payments and budget management.

NEW YORK —The agency CRC has hired Kathiusca Nunez as a junior account executive. Most recently, Nunez was a junior account executive at Havas Formula and prior to that she worked at Alison Brod P