Invest Northern Ireland | 71,650 followers on LinkedIn. Invest NI help new and existing businesses to compete internationally and attract new investment to Northern Ireland. | As the regional business development agency, Invest NI's role is to grow the local economy. We do this by helping new and existing businesses to compete internationally, and by attracting new investment to Northern Ireland. We are part of the Department for the Economy and provide strong government support for business by effectively delivering the Government’s economic development strategies.