As part of BoomTown’s duty as internal jobs board for Yahoo, here’s another departure: CIO Michael Kirwan (pictured here).

A terse email went out yesterday about Kirwan’s leaving.

According to his Yahoo bio, he had “global responsibility for Yahoo!’s Corporate Systems group, which includes the IT Infrastructure, Corporate Applications, CRM and Premium Services Infrastructure teams. These teams ensure Yahoo!’s internal systems and billing/anti-fraud services are available 24/7.”

In other words, the guy who keeps the lights on at the Silicon Valley icon!

Kirwan reported to David Dibble, EVP of Service Engineering & Operations at Yahoo.

Kirwan previously worked at VeriSign, as well as at Bank of America, Bank of California and Union Bank of California.

Goodness gracious, make it stop!

You must know by now how much BoomTown loves internal Yahoo (YHOO) memos. But this is getting ridiculous.

It’s been like a flash flood after a long drought at Sunnyvale HQ today, as Yahoo CEO Carol Bartz turns on the fire hose of a whole lot of communicating.

A lot. A real lot.

“I know you guys have reorg fatigue,” wrote Bartz, in the latest email to employees about the management reorganization finally announced this morning.

Also memo fatigue at All Things Digital HQ, if you can believe it.

Okay, I give, Carol! Well, for now, until another juicy internal memo you aren’t handing out freely lands in my inbox, for example, such as one about a search deal with Microsoft (MSFT). I’d like one of those to go, please!

But, in a gesture of a leak-free peace (can the drop-kick bounty be suspended for just today?), I am posting this last memo about the management reorganization from Carol “Chatterbox” Bartz.

(Although, I wish she would stop insulting the press, as she does below again. We are just doing our job–and very accurately, as it turned out–yet the jibes continue. Which is odd, frankly, given that Bartz has had mostly glowing coverage in the media her entire career.)

But Bartz did seem to leave a little mystery in the email still, as if even more rearranging were to come.

Writes Bartz (my bolding):

“As soon as decisions were made, I wanted you to know about them–even if that means we don’t have all the details nailed down yet”.

Wait, are the deets all nailed by Bartz’s productive hammer or aren’t they?

At least, thankfully, the note is capitalized properly, unlike the quaint no-caps stylings of former CEO Jerry Yang.

In any case, if you just can’t get enough, here is Bartz’s reorg blog from this morning and her new management structure memo too.

And here is her entire email on the reorg to employees:

From: Carol Bartz
Reply-To: Carol Bartz
Date: Thu, 26 Feb 2009 09:02:49 -0800
To: “all-worldwide@yahoo-inc.com”
Subject: Our New Organization

Yahoos,

As I’ve gotten to know Yahoo! over the past several weeks, I’ve developed a point of view on how our organization should be structured to set us up for success.

Our goal is simple: to consistently deliver awesome consumer and advertiser experiences, everywhere in the world we do business. Delivering great customer experiences is everyone’s job at Yahoo!–and each part of our organization will have a clear role in making that happen every day.

The timing of this announcement is important. As soon as decisions were made, I wanted you to know about them–even if that means we don’t have all the details nailed down yet. Yes, there’s been a lot of speculation in the media over the past few days…that’s been a little frustrating, but I’m not willing to speak publicly about decisions before they’re final. Today, they are–so I’ll lay out our new organizational structure for you now.

I know you guys have reorg fatigue. Hang in there–our intention is to leave this structure in place for two to four years. We’ll continue to make adjustments as needed, but we expect this core structure to stay put.

The structure outlined below will enable us to make big improvements in our product quality and operational efficiency. Part of that is simplicity–I’m frankly amazed at how complicated some things are here! We’ll have much clearer decision making and accountability. Product and regional teams will share responsibility for revenue targets and expense management, but we’ll have one P&L, for which I’m accountable.

We will also be in a better position to really listen to and understand our customers–both consumers and advertisers. I think we’ve gotten into the habit of focusing internally too much and we sometimes forget who we’re here to serve. You’ll notice that our management structure puts a renewed focus on the customer, with stronger feedback loops across the company…and they all come through me.

Also, as you know, no organizational structure is a substitute for collaboration, communication and trust. We’ll all need to evolve our behavior a bit–as teams and as individuals – to make this structure work the way it’s designed.

So here’s the overview, with the roles that will report directly to me. As you’ll see, some of our leaders are still to be determined. I know you’ll
want more detail than what’s below–you can learn more on Backyard: http://backyard.yahoo.com/ourorg .

Products: We’ve combined Tech and Product groups under one roof, led by Ari Balogh as EVP Products & CTO. Ari’s charter is to deliver global products that enable extraordinary consumer and advertiser experiences. Ari’s direct reports now include one leader for each product group–we’ve taken care of the “two in a box” problem.

One important note: The Connected Life team has been integrated into various parts of the new organization. Our mobile strategy remains a key part of Yahoo!’s focus going forward and all of our product groups will own mobile innovations. After leading Connected Life for four years, Marco Boerries has resigned from the company to spend more time with his family in Europe. We thank Marco for his important contributions at Yahoo!.

Regions: There are now two: North America and International. As I’ve said before, international growth is critical for Yahoo!, which has become too reliant on its U.S. business over the years.

The regions deliver Yahoo!’s products, programming and services to consumers, partners and advertisers in local markets. They will partner closely with the newly formed Regional Solutions & Products group in Ari’s organization to help drive a significant shift in how Yahoo! develops products for different geographies. The goal is to have global platforms on which regional product offerings are based.

The North American region–comprised of the U.S. and Canada–is led by Hilary Schneider. The leader of our International region, to be hired soon, will be responsible for a cohesive Yahoo! global strategy and seizing our international growth opportunities. Until we determine who’ll lead the International region, Rose Tsou (Asia), Rich Riley (Europe) and Keith Nilsson (Emerging Markets) will continue to report to me.

Marketing: Elisa Steele will be joining Yahoo! as our Chief Marketing Officer (CMO), effective March 23. Elisa joins us from NetApp where she was SVP, Corporate Marketing. Previous to NetApp, she held executive positions in marketing at Sun Microsystems. Elisa will oversee our global marketing strategy and provide direction for our marketing function. She’ll bring together the various Yahoo! marketing teams that have been spread across the company. Reporting into Elisa will be Brand Marketing, Audience Marketing, Corporate Communications, Insights, Policy & Privacy, Community Affairs and related central teams. I’m delighted to have Elisa joining the team.

Customer Advocacy: As I said, we can do much better in hearing the voice of the customer across Yahoo!, and incorporating what we hear into all of our work day-to-day. We have opened a search for a leader, who will oversee Customer Care and Ad Operations globally with the goal of improving how we support Yahoo!’s users and advertisers. In the interim, these teams will continue to report to Hilary.

Service Engineering & Operations: This new team is responsible for delivering common technology services at scale, including application management and infrastructure. No matter how cool our products are, the customer’s experience won’t be great unless our applications consistently deliver. Note that we’re bringing Service Engineering together as one group because these engineers bring expertise that is best applied horizontally. Leading this organization is David Dibble, who joined Yahoo! in December. David’s team also will be accountable for delivering more effective corporate IT systems.

Corporate Functions: Blake Jorgensen will be leaving Yahoo! and I am searching for a new CFO. Blake will remain through a transition with his successor, and I want to thank Blake for all of his great contributions to Yahoo! over the past two years. Mike Callahan will continue to lead our Legal team, and David Windley leads our Human Resources function. Joel Jones joins the team as my Chief of Staff.

So that’s the high-level view. These changes are effective immediately, but we’ve got more work to do in filling out the structure of each group. In the short term, this transition will be challenging for many of our people. My executive staff will be working with their organizations as quickly as possible to create further clarity. For example, we’ll need to recast budgets and adjust work areas so we have the right people working side-by-side.

I want to thank all of you who’ve shared your ideas and views with me since I arrived. Several leaders across Yahoo! came together to design this new structure–I’ve been very impressed with their dedication to the right outcomes, particularly how they’ve embraced the need to eliminate the silos that have been a drag on this organization for so long.

I think this organizational structure has the potential to solve many of the issues you’ve helped me better understand. Of course, new issues will emerge. But I know we’ll be aligned and nimble in tackling them together.

This is a tremendous, proud company with a powerful brand, great products and a bright future. Now’s the time to get more focused than ever on delighting our users and advertisers. Let’s show them how great Yahoo! can be.

Carol

It’s pretty much what BoomTown has been reporting all week about the reorg.

Top-down simplification, which is another word for: Carol rules over Yahoo (YHOO).

CTO Ari Balogh gets a lot of stuff as new head of products, and so does U.S. head Hilary Schneider, including mobile, as EVP of North American Region. Both report to Bartz.

Unmentioned, but Audience Products head Ash Patel is still in. So is General Counsel Michael Callahan.

New chief marketing officer is Elisa Steele, who come from NetApps (NTAP). Bartz happens to be on the board of NetApps, by the way.

New International head TBD.

Bartz also sent an email to employees about the changes.

Here is the entire memo:

New Yahoo! Management Structure Overview

February 26, 2009

· Our goal as a company is simple: to consistently deliver awesome consumer and advertiser experiences everywhere in the world we do business. So we’re creating an organization to enable improvements in our product quality and operational efficiency, as well as clear decision making and accountability.

· Tech and Product groups will be combined to create a single organization called Products. Products will be led by Ari Balogh as EVP of Products and CTO, reporting to Carol Bartz, with the goal of enabling extraordinary consumer experiences tied to compelling advertiser and publisher offerings. This organization is responsible for the vision, strategy, and quality of every product we create–regardless of region, device format or category.

· There are now two regions–North America and International. The regions are responsible for delivering Yahoo!’s products, programming and services to consumers, partners and advertisers in local markets. North America will be led by Hilary Schneider, EVP, North American Region, reporting to Carol Bartz. International’s leader will be hired soon.

. Mobile will continue to be a key priority for Yahoo!. Going forward, David Ko will lead the mobile business, strategy and monetization teams for Yahoo! (Head of Global Mobile Business, reporting to Hilary Schneider). All of our product teams will be responsible for incorporating mobile innovations into their products.

· A Chief Marketing Officer (CMO) role has been created to oversee our global marketing strategy and provide direction for our marketing function. Today, we named our new CMO, Elisa Steele. Elisa starts on March 23. She will bring together the various marketing teams that have been spread across the company.

· A new Customer Advocacy group will help us to better hear the voice of the customer (consumers/advertisers) across the company and incorporate what we hear into all our work throughout Yahoo!. We will hire a new leader for this team.

· The newly created Service Engineering & Operations (SE&O) team will be chartered with delivering common technology services at scale, including application management and infrastructure. The team will be led by David Dibble, SVP of SE&O. We’re bringing Service Engineering together as one group because these engineers bring expertise that is best applied horizontally.

· Our corporate functions will consist of HR led by David Windley, Legal led by Michael Callahan, and our CFO is to be hired, with Blake Jorgensen remaining through the transition. Joel Jones will serve as Carol Bartz’s chief of staff.

· This structure is designed to last two to four years; however, we’ll continue to make adjustments as needed. But we expect this core structure will stay in place.

· These changes become effective immediately.