Síobhra is a Partner in the Employment, Immigration and Reward department and head of the Dublin office at Lewis Silkin.

She has practised employment law for more than twenty years and has expertise in a wide range of employment law issues, both contentious and non-contentious. She also advises international clients establishing in Ireland – including on contracts of employment, handbooks policies and procedures. She has advised on internal commercial re-organisations, transfer of undertakings, employment issues and the employment provisions in commercial transactions and has represented clients in all adjudicatory bodies in Ireland including the Workplace Relations Commission, the Labour Court, the Circuit and High Courts and the Court of Appeal.

She is consistently ranked in the Chambers Europe legal directory, where she is described by a client as "responsive, proactive and pragmatic, as well as solution-oriented."