Investment and corporate banking arm of BMO Financial Group, BMO Capital Markets has appointed veteran investment banker Colleen Campbell as a vice-chair of BMO Capital Markets. Campbell began her career with BMO Capital Markets in 1997 and spent 12 years as head of Canadian debt capital markets. Since 2009, she has been global head of debt capital markets.

Madison Dearborn Partners said Monday it has agreed to invest in Aderant Holdings. The sellers are Vista Equity Partners and company management, which will retain “significant” ownership positions. Financial terms weren’t announced. MDP is buying about half of Vista Equity’s and Aderant management’s stakes, the statement says. Atlanta-based Aderant provides business management software for law and professional services firms. BofA Merrill Lynch provided financial advice to MDP, while BMO Capital Markets and Marks Baughan advised Aderant and Vista.

Mason Wells has acquired Whitehall Specialties. Financial terms were not announced. Northleaf Capital, PPM America, Audax Mezzanine and company management are also investing. BMO Capital Markets and Audax are providing financing. Whitehall, of Wisconsin, produces and markets custom analog and processed cheese products.

Doug Lawson has joined Lazard Middle Market where, as an MD, he will focus on the packaging and plastics sector. Before this, he was an MD at BMO Capital Markets.

Seth Rosenfield has been a media banker for 15 years and still thinks there’s lots of opportunity in the sector.

Seth Rosenfield has joined Petsky Prunier as an MD. He’s focusing on information services and business media. Rosenfield is a former banker with BMO Capital Markets and Veronis Suhler Stevenson.

Pierre Oustinow has joined the US M&A Group at BMO Capital Markets in Boston. He joins as a managing director and will focus on technology M&A. He will report to Scott Humphrey, who is based in Chicago. PRESS RELEASE Pierre Oustinow has joined the U.S. M&A Group at BMO Capital Markets in Boston. He joins [...]

Lincoln International has hired Peter Stack as a managing director in its business services group, where he will lead the firm’s marketing services practice. Based in Chicago, Stack joins the firm from BMO Capital Markets where he was a managing director in the business services & media investment banking coverage group, specifically focused on advertising [...]

Mason Wells said Wednesday that it has closed its buy of Eddy Packing. Financial terms weren’t announced. Co-investors included Scott McNair, Akoya Capital, Hancock Capital Partners and the former owners of Eddy. Yoakum, Texas-based Eddy is a premier processor of beef, pork and poultry products. BMO Capital Markets, Zions Bank and Associated Bank provided senior financing. Hancock Capital Partners provided mezz debt.

A team of ex-Houlihan Lokey bankers have started their own firm to advise growth companies in the Washington D.C. area.

The executives, all from Houlihan’s business services group, formed Clearsight Advisors in July, says Joel Kallett, who is the firm’s co-founder and MD. Kallett is joined at Clearsight by Greg Treger, also a co-founder and MD; Bhavin Patel, a vice president; and, Bethany Seidler, director of administration.

Clearsight, based in McLean, Va., will target growth companies in technology and services with $25 million to $200 million in enterprise value, says Kallett.