Mr Tooman will succeed Elizabeth Larkin and will take up the responsibility for all financial services and information technology services.
Mr Tooman joins Ikaria from Enzon Pharmaceuticals, where he was executive vice president of finance and CFO since 2005.
Prior to joining Enzon, he served as senior vice president of strategic planning and corporate communications at ILEX Oncology, which was acquired by Genzyme in 2004.
Daniel Tasse, chairman and CEO of Ikaria, said: “I am delighted that Craig will join us in this key executive role, and am confident that we will benefit greatly from his knowledge and experience in effectively managing the financial aspects of our business.
“I believe that Craig’s expertise — combined with our product pipeline and commercial capabilities — will help us achieve our vision of becoming a leader in critical care. I also wish to thank Liz for building a strong foundation from which we can build.”