“The team at MongoDB has done a phenomenal job of getting grassroots interest, but they could use someone like me — someone who can’t hang with them technically — to simplify the message and help people understand that we’re on the cusp of a new opportunity here,” Goldmacher explains. “Our analog lives are being replicated digitally, which means so much data exists and you can’t wait any longer to do something with it.”

Goldmacher has been with Cowen for the past decade, where his current coverage includes Intuit (INTU), Oracle (ORCL), Salesforce.com (CRM) and SAP (SAP). Before that, he spent a bit of time in corporate planning with BMC Software and as an analyst with Merrill Lynch and Oracle.

MongoDB is a NoSQL database company that has raised over $220 million in VC funding from Intel Capital, New Enterprise Associates, Red Hat, Sequoia Capital, T. Rowe Price, Salesforce.com and Altimeter Capital.

What follows is an email that Goldmacher sent out earlier today to friends and colleagues:

After a decade of trying to keep the world safe for capitalism, I am leaving Cowen and Wall Street to go back into industry.   10 years is a long time and I am grateful for the opportunity Cowen gave me to stand on the sidelines and throw rocks, I mean, be a sell side analyst, and build a career.  I will remain at Cowen thru the first week in June to follow through on a number of commitments including our Tech Conference in New York at the end of May.

For the three or four of you that actually read my research, you know that I fully believe we are on the cusp of a great opportunity in the data management space.  After a week or two off to sleep in until 5 AM, walk my kids to school and get my girlish figure back, I am going to join MongoDB to try and help the company in any way I can.  Mostly sweeping the entry way and taking out the garbage to start, but when I started at Oracle in 1993 ordering Danishes for the seminar group, the company was barely doing $1B/Q and look at them now…

At life’s major turning points one tends to get reflective, but I will spare everyone my deep thoughts.  Let’s simply leave it at the observation that if I’ve accomplished anything in my time at Cowen, I accomplished it with the help of far too many people to mention.  I am extremely grateful for the countless kindnesses I have received along the way and while I hope I’ve given more than I’ve taken, I know that’s not the case.  Quick thanks to the people without whose help I never would have been able to do what I do: Kevin, Chris, Barry, Joe and Isabelle.

So next time you are walking around Palo Alto or a software tradeshow and you see a guy with male pattern baldness in skinny jeans and a hoodie, stop and say hi, I’d love to catch up…

Fortune has reached out to Cowen and MongoDB and will update this post if we hear back.

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