The firm has taken on a healthcare and cleanteach team from UK brokerage Nomura Code, headed by Juliet Thompson.
In total the team boasts three equity professionals and three corporate financiers.
Separately, Eithne O’Leary, the former head of equities at the broker, has been promoted to deputy chief executive at Oriel.
O’Leary said: “The healthcare and cleantech markets are attractive, with a large number of companies coming to market or seeking capital raisings.
“The team come as a fully integrated research and advisory unit and are a strong fit with our existing research and corporate finance capabilities, as well as our overall strategy.”
The former Nomura Code team, which has advised on more than 75 transactions, including 20 initial public offerings, brings with it five new clients to Oriel.
Oriel has 51 retained corporate broking clients.