Actavo, the Denis O’Brien-owned engineering services company previously known as Siteserv, is expanding into the US.

Actavo, the Denis O’Brien-owned engineering services company previously known as Siteserv, says it is on course to break €500 million in sales this ye(...)

Gardaí man the periphery of the crowd as the Dublin St Patrick’s Day parade continues at Parnell Square, March 17th, 2016. Photograph: Peter Smyth/The Irish Times

Hundreds of thousands of spectators are expected to throng the streets of cities and towns across the country for this year’s St Patrick’s Day parades(...)

Hillary Clinton will almost certainly be the Democratic nominee. Photograph: AP

The third successive “Super Tuesday” state nominating contests in the US presidential election threw up two significant outcomes: Hillary Clinton wil(...)

Republican US presidential hopeful Ohio Governor John Kasich celebrates his Ohio primary victory. Photograph: AFP

After a critical win on his home turf, Ohio Governor John Kasich begins a new phase of his long-shot presidential campaign that his aides hope will ul(...)

Democratic presidential candidate Hillary Clinton holds a rally in Palm Beach after winning the Florida primary. Photograph: EPA

Republican candidate Donald Trump scored more big victories in his bid to be the party’s presidential nominee, winning the key state of Florida and kn(...)

Bob Bolus, a supporter of US Republican presidential candidate Donald Trump, gives the thumbs up to drivers as they pass by on Super Tuesday in Middleburg Heights, Ohio. Photograph: Aaron Josefczyk/Reuters

Donald Trump could take a giant step on Tuesday toward securing the Republican presidential nomination if he wins the Florida and Ohio primaries, whi(...)

Donald Trump speaks at campaign rally on Saturday in Cleveland. The inflammatory candidate dismissed anti-Trump protesters in Chicago as ‘an organised group of thugs’. Photograph: Jeff Swensen/Getty Images

“Screw Trump!” a woman shouts at Marco Rubio as the Florida senator poses for selfies with supporters in his home state at a coffee shop in Tampa. “(...)

A protester interrupts US Republican presidential candidate Donald Trump’s speech during a campaign rally at the downtown Midland Theater in Kansas City, Missouri, on Saturday. Photograph: Dave Kaup/Reuters

Police used pepper spray twice outside a Donald Trump rally in Missouri and made two arrests as violent protests continued to dog the Republican pres(...)

Demonstrators hold a protest sign featuring Donald Trump outside a cancelled campaign event with in Chicago, Illinois. Photographer: Daniel Acker/Bloomberg

Donald Trump’s Republican rivals for the White House condemned protests that shut down his planned Chicago rally on Friday, but said his incendiary sp(...)

Donald Trump  speaks during a news conference with Ben Carson on Friday: the retired neurosurgeon has endorsed Mr Trump after ending his own campaign last week. Photograph:   Andrew Harrer/Bloomberg

Billionaire Donald Trump, the anti-establishment figure shaking up the Republican presidential race, received the backing of another outsider, retire(...)