Mr O’Shea, based in the firm’s Cork office, has been promoted to partner in the firm’s banking and finance department.

He advises corporate borrowers, sponsors, financial institutions and alternative lenders on a wide range of international and domestic finance transactions.

He has particular expertise in fund finance, acquisition finance, corporate finance and real estate finance (investment and development).

He also advises on sustainable finance and is a key member of the firm’s energy, renewables and utilities sectoral group.

Mr Booth has been promoted to partner in the firm’s projects and construction department, reflecting his significant contributions to its energy, renewables and utilities sectoral group.

He advises the full spectrum of entities in the Irish energy market, including conventional and renewable generators, electricity suppliers, project developers, funders and end users.

He has extensive experience negotiating complex commercial contracts for key clients of the practice such as EirGrid, Ireland’s transmission system operator and Aughinish Alumina, Ireland’s largest industrial gas user.

Mr O’Sullivan, a chartered tax advisor and chartered accountant, joins the firm as a tax partner.

He brings over 15 years’ experience providing strategic tax planning and compliance services to a diverse range of clients, including multinational corporations and high-net-worth individuals.

William Fry managing partner Stephen Keogh said: “I am delighted to announce these new appointments.

“David and Colm are both trusted legal advisors who for many years have been providing our clients with the highest levels of service and expertise. Their promotions are testament to their hard work, collegiality and dedicated client service.

“Cian, a senior tax expert, is a strong addition to the firm whose experience and expertise will enhance our market leading tax practice.

“All three appointments demonstrate the firm’s unwavering commitment to developing and attracting the best legal and tax talent in the market.”