Two different company initiatives are to create 110 new jobs.
Sixty are planned as a result of a joint venture involving a Dublin-based solar company, BNRG Renewables.
The joint venture, with French renewable energy group Neoen, aims to develop more than €220m of solar projects in Ireland.
BNRG Neoen Holdings, will co-develop a portfolio of 23 projects in the south and east of the country totalling over 200 Megawatts (MW).
When constructed, the planned total investment in renewable energy infrastructure will exceed €220m.
The overall project will create up to 60 full-time positions in operation and maintenance as well as another 2,000 jobs during the construction phase and other indirect jobs.
Meanwhile, Irish ICT support firm Nostra has today announced 50 new posts.
The company, which was set up by Kevin O'Loughlin, Gary Byrne, Senan Finucane and Barry O'Loughlin in 2006, is aiming to increase its headcount from 75 to 125 over the next five years.
A company spokeswoman said that the firm is to recruit computer engineers and sales personnel.
Nostra provides IT support services to companies including BoyleSports, Dawn Farm Foods and aerospace giant Avolon. A spokeswoman said that the company's 2016 turnover was over €7m and that it aims to triple that figure by 2020.
Nostra has recently extended its headquarters and has just completed a full renovation of its 9,000 sq ft office.