Lagan Energy was established by company director Stephen Lagan in 2014.
Since then, the company has experienced significant growth and is projected to employ more than 150 full-time staff by the end of 2025, adding about 30 roles as it looks to diversify into new and emerging sectors in the green economy.
During a visit to the company, economy minister Conor Murphy said: "To achieve net zero we need more energy from hydrogen, onshore and offshore wind, and solar.
"Companies like Lagan Energy are showing that there are also huge commercial opportunities in the green economy.
"The 30 new, highly skilled jobs that will be created by the company in Omagh over the next few years will help to achieve a regionally balanced economy with a drive towards net zero."
Lagan Energy recently became the first company on the island of Ireland to successfully install a hydrogen electrolyser, producing green gas from renewable energy.
Emmet Lagan, director of Lagan Energy, said: "Our mission is to design, develop and deploy carbon-friendly solutions for our current electricity grid generation and reconfigure the way we generate electricity both as a nation and internationally.
"This investment in 30 new jobs, which is being supported by Invest Northern Ireland, will enable us to expand our capabilities in the Green Hydrogen, Renewables and Data Centres sectors and bring us closer to meeting the increased demands for our resources in the international market."
He added: "Globally, governments are targeting hydrogen production as a means to decarbonise heavy industry and therefore opportunities are emerging for companies like us with skills in those areas.
"We forecast that within three years our income from hydrogen and offshore wind projects will represent 40 per cent of total turnover."
Jeremy Fitch, executive director of Business Growth Group at Invest NI, said: "It is great to see Lagan Energy continue to grow and strengthen its position as a frontrunner in the renewables sector in Northern Ireland.
"Since setting up, the company has benefitted from a range of Invest NI support and in particular has drawn on the in-market expertise that we provide."