Frank Glennon, an experienced executive in the Breedon Group, is suing his former employer in the Dublin Circuit Court in relation to his dismissal by the company. Glennon joined the business in 1989 when it was the Lagan Group of companies. He was operations director with the Irish business where he was responsible for its bitumen business, an important material used in construction.  Glennon worked with the Lagan Group until 2018, when the Irish firm was bought by British construction materials business Breedon Group Plc, which has a market capitalisation of almost £1.5 billion. The acquisition was reported at the…