アイルランド在住。水産養殖の分野を長年に渡り研究。アイルランドとオーストラリアで魚介類の養殖産業の発展に携わる。この分野で多数の執筆経歴を持つ。2000年までElsevier Science B.V.（Amsterdam)にて数々の学術誌の英文校正を担当。またTaylor&Francis Oxfordにて科学、医学分野の英文校正も担当。

Dr O'Sullivan has been an active researcher in the field of aquaculture, as well as being involved practically in the development of several aquaculture industries in both Ireland and Australia. Widely published in his field Dr O’Sullivan is now a full-time Copyeditor. From 1994 to 2000 undertaking English correction of journals and book editing for Elsevier Science B.V. (Amsterdam), Dr O’Sullivan worked in the fields of science and medicine. Dr O’Sullivan has also copy edited for Taylor&Francis, Oxford. Dr O’Sullivan began working with Edanz Editing in 2006.