De Luna Partners Inc. — Michael Barrett has joined the firm’s Orinda, Calif. office as a partner, where he will be involved in all aspects of fundraising for private equity, alternative assets funds and global equity strategies. Barrett was previously managing director of private equity at Mesirow Financial in Chicago.

Paradigm Ltd. — Arshad Matin has been named chief executive of the software developer for the oil and gas industry. U.K. private equity firm Apax Partners LLP acquired Paradigm for $1 billion in June 2012. Matin, who is also slated to be a member of the board of directors, will be based in Houston.

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