Hopkinton-based planning and construction management company The Richmond Group (TRG) has added Jeffrey Nollet, Matthew Fletcher and J. Ryan St. Martin to its field staff.

"Jeff, Matt and Ryan epitomize both the work ethic and background experience that we value at The Richmond Group," said Steve Carbonneau, president. "Our projects consist of complex, mission-critical facilities that enable our clients to pursue highly-advanced initiatives, and we’re excited to expand our field supervision team in support of these efforts."

Nollet, who has been named project superintendent, has 20 years of experience including roles as field engineer, superintendent, mechanical superintendent and mechanical coordinator, according to a statement.

Fletcher, who has been named assistant superintendent, previously helped oversee projects for clients such as Caritas Christi Carney Hospital, Caritas Christi St. Anne’s Hospital, Caritas Christi Good Samaritan Medical Center, Beth Israel Deaconess Medical Center and Tufts University.

St. Martin, who has been named assistant superintendent, will apply his background of civil engineering and construction management to his new role. Before joining TRG, St. Martin was a civil engineer for Boston’s Zakim Bridge inspection and Tobin Bridge Rehabilitation projects.