Heidrick & Struggles International Inc. (NASD: HSII) announced a new CFO and chief operating officer among other executive changes. The Chicago-based executive search and leadership assessment firm also named a new managing partner for its Centers of Excellence.

Mark Harris joined the firm to succeed Richard Pehlke as CFO when Pehlke retires March 31. Harris most recently was CFO at Hercules Capital, a publicly traded business development company.

Harris’ former roles include senior managing director/head of Asia, CFO and head of asset management of Avenue Capital Group’s Asia funds; corporate financial controller at Hutchison Telecom, a New York Stock Exchange-listed telecommunications company based in Hong Kong; and VP-finance as well as general manager for both the financial shared services and human resources solutions lines of business at Vsource in Singapore, a business process outsourcing company.

The firm also named Michael Cullen to the new role of COO, with responsibility across the enterprise for IT, marketing, practice operations and the Knowledge Management Center, as well as for the leadership of executive search across the firm’s three global regions: Europe and Africa, Asia Pacific and the Middle East, and the Americas.

Cullen previously served as global practice managing partner for the firm’s global technology and services practice, where he will continue to be a strategic talent adviser for a select group of companies.

Ron Lumbra takes on the new role of managing partner for Heidrick & Struggles’ Centers of Excellence, responsible for the functional practices and the private equity practice within executive search, the firm’s strategic accounts, and H Labs, the enterprisewide product development function delivering diagnostics for the firm’s client teams. Previously, Lumbra had been regional leader, Americas.

Rebecca Foreman Janjic replaces Cullen as global managing partner for the firm’s global technology and services practice. Based in the San Francisco office, Janjic also co-leads the firm’s big data and analytics specialty practice. Her own executive search work focuses on recruitment of C-suite and VP-level executives within software, internet, and technology services companies.

“These leadership changes are an integral step within our firm’s growth strategy,” said President and CEO Krishnan Rajagopalan said.