A Co Tyrone manufacturing firm has doubled its workforce to 1,000 staff in just three years while reaching turnover of £80m.
Keystone has also become the first Northern Ireland manufacturer to be singled out for praise by a Westminster group.
The Cookstown company was named in this year's Parliamentary Review, manufacturing edition.
The company, founded in 1989, produces a range of building products for the construction sector
It employs around 1,000 staff across its Cookstown headquarters, along with sites in England, Wales and Poland.
The group has experienced steady growth, more than doubling its workforce in just three years. And it's grown its turnover to more than £80m. It has also added three new companies to its business. The firm also played host to Northern Ireland Secretary James Brokenshire, during the fifth meeting of his business advisory group.
Keystone's chairman Sean Coyle said: "Since we set the company up in 1989, making one product with a handful of staff, it's been an incredible experience to see it grow to the level we have reached today. Keystone is a company which we are proud to lead, and which our employees are proud to work for. We feel honoured that we have been chosen as the first Northern Ireland-based manufacturing company to be featured in the Parliamentary Review."
The company also picked up a Construction Industry Award.
Mr Coyle said the group company Keylite was also named by the London Stock Exchange among the 1,000 Most Inspiring Companies in Europe.
"The Keystone Group has grown rapidly, and will continue to do so, given our ongoing commitment to innovation and quality," he said.
The Keystone Group was established by Sean Coyle, who had seen steel lintels as a niche opportunity in the Irish market.
He initially worked in partnership with McAleer & Rushe, before setting up Keystone as an independent company.
Speaking during his visit to the firm, James Brokenshire, said: "The construction sector is vital for those who work in it and rely on it, and for the Northern Ireland and UK economy as a whole. I will continue to listen intently to business here to ensure priorities, challenges and opportunities in Northern Ireland are properly understood, as we build an economy that works for everyone".
Speaking after the event, Sean Coyle, said: "Keystone was honoured, as one of the significant manufacturing companies in our area, to host the meeting between the Secretary of State and NI construction sector businesses on the ongoing Brexit situation.
"The recent vote to leave the EU has already thrown up considerable challenges and we enjoyed hearing from the Secretary of State how he and the UK Government plan to address those challenges".