戴维•卡尔霍恩本月早些时候宣布称，他将从尼尔森控股（Nielsen Holdings）CEO的位置上退下来，从他当初离开通用电气（General Electric）加盟这家公司，至今已将近8年。如今，我们了解到了他下一站落脚的地方——黑石集团（the Blackstone Group），它刚好也是2006年收购尼尔森的6家私募股权公司之一（尼尔森在2011年重返公开交易市场）。

    卡尔霍恩将领导黑石的私募股权投资组合管理业务，基本上是说，他将帮助CEO们应对各种营运挑战。他还将在新交易尽职调查过程中与黑石合作，帮助确定收购后的业务策略。

    “其他一些大公司的CEO们加盟私募股权公司时并不真正懂这项业务，但戴维跟他们不同，他管理过一家私募股权公司持有的企业，”黑石私募股权业务负责人乔•巴拉塔解释说。“他尤其了解我们公司，了解更普遍的私募股权公司治理问题，了解我们的干预策略以及围绕这些交易的风险。”

    卡尔霍恩预计将代表黑石成为几家投资组合公司的董事，而且仍将担任尼尔森公司执行董事长的职务。

    《财富》杂志（Fortune）获得了巴拉塔之前一日发给黑石员工的内部备忘录。我们将其抄录如下：

    我很高兴地宣布，我们投资过的一家非常成功的公司——尼尔森的前CEO戴维•卡尔霍恩已经决定加盟黑石，担任私募股权投资组合营运主管。戴维拥有担任私募股权所有和公开市场所有的全球性企业领导的广泛职业经历。他了解我们这个业务，理解黑石的独特文化，懂得如何在公司中创造价值。更重要的是，戴维与我们的投资组合营运团队以及我们与投资组合公司的互动方式方面拥有广泛的个人经验。实际上，正是由于他与我们团队大量积极的互动以及他对我们公司的了解促使他在他所获得的诸多机会中选择了黑石。

    为了继续给我们的有限合伙人和股东提供优异的投资回报，我们必须持续提高发现、了解优秀投资目标的能力，支持优秀的管理团队，通过营运干预来提高投资组合公司的业绩。戴维让我们在所有这些努力中变得更为出色。

    戴维的时间将分配给与现有投资者组合公司的CEO们进行协作，和与交易团队协作找出新的投资组合机会和营运方面的价值创造策略。他还将在公司管理和执行委员会任职。

    我们随附了一份黑石的新闻稿来宣布这个令人兴奋的消息。戴维将从明年1月初正式开始工作，办公地点在纽约市公园大道345号44楼，请和我一起欢迎他加盟我们伟大的公司!

    Dave Calhoun announced earlier this month that he would be stepping down this year as CEO of Nielsen Holdings (NLSN), nearly eight years after joining from General Electric (GE). Now we know his next stop: The Blackstone Group, one of six private equity firms that purchased Nielsen in 2006 (it returned to the public markets in 2011).

    Calhoun will lead Blackstone's private equity portfolio management group, which basically means that he will aid CEOs with various operational challenges. He also will work with Blackstone (BX) during due diligence for new deals, helping to identify post-acquisition business strategies.

    "Unlike some other big company CEOs who join private equity firms without really understanding the business, Dave really gets it because he's been running a company owned by private equity firms," explains Joe Baratta, Blackstone's private equity boss. "He understands our firm specifically, but also broader issues of private equity governance, what our intervention strategies are all about and the risks surrounding these deals."

    Calhoun is expected to take a handful of portfolio company board seats for Blackstone, and also will remain as executive chairman at Nielsen.

    Fortune has obtained an internal memo Baratta sent to Blackstone employees yesterday. We have reprinted it below:

    I am pleased to announce that Dave Calhoun, the former CEO of one of our highly successful portfolio companies, Nielsen, has decided to join Blackstone as head of Portfolio Operations in Private Equity. Dave has had an extensive career as the leader of global scale businesses under both private equity and public ownership. He understands our business, Blackstone's unique culture, and how to create value in companies. Importantly, Dave has extensive personal experience with our portfolio operations group structure and how we interact with our portfolio companies. In fact, his substantial and positive interaction with our team and his understanding of our firm is what motivated him to choose Blackstone over the myriad other opportunities he had.

    In order to continue delivering excellent investment returns to our limited partners and shareholders, we must continuously improve our ability to identify and understand great investment targets, back excellent management teams, and intervene operationally to improve the performance of our companies. Dave makes us better in all of these efforts.

    Dave will be splitting his time between working with the CEOs of our existing portfolio companies and working with deal teams to identify new investment opportunities and operational value creation strategies. He also will serve on the firm's Management and Executive Committees.

    I have attached a copy of Blackstone's public press release regarding this exciting news. Dave will officially start working with us in early January, located on the 44th floor of 345 Park Avenue-- please join me in welcoming him to our great firm!