Beyond the Big Three: The Who's Who at Facebook

When Facebook went public a year ago, the spotlight was on three principal characters: CEO Mark Zuckerberg, COO Sheryl Sandberg, and CFO David Ebersman.

The three C-suiters were on the public stage throughout the company's road show presentations to potential investors, and literally on stage together as they rang the opening bell the day of its IPO.

Zuckerberg and Sandberg have had a particularly busy year; in addition to running the company Zuckerberg has gotten involved in philanthropy and political action, and Sandberg has been on book tour to promote "Lean In." But as the company grows, so does its bench of high-profile executives.

(Read More: Facebook Shares One Year On—Time to Reconsider?)

Facebook headquarters
Harriet Taylor | CNBC

Here are a few other Facebook names, beyond the big three to watch:

Chris Cox, VP of Product

At product unveilings Facebook likes to feature the people who have spearheaded its innovations on stage, so Chris Cox has increasingly been talking to the media. The VP of Product oversees everything consumers interact with on the site and Facebook's app. He was involved in the redesign of the site and the launch of graph search.

He dropped out of a Stanford graduate program in 2005 to join Facebook as a software engineer. Now he's so close to Zuckerberg and his vision for the company that he speaks to all new employees on their first day at the company.

Mike Schroepfer, Chief Technology Officer, VP of Engineering

Responsible for the technology behind Cox's products, is Mike Schroepfer, the fourth in the C-suite, as Chief Technology Officer as well as VP of Engineering. He joined Facebook from Mozilla, and before that, Sun Microsystems. He oversees all of Facebook's technology—the tools needed by employees to create new products and drive its growth, and also everything that maintains the site and keeps it running twenty-four seven around the world.

As Facebook builds its advertising business, it's been growing its list of senior executives who interact with Madison avenue.

David Fischer, VP of Advertising and Global Operations

Overseeing the biggest piece of Facebook's revenue ads is VP of Advertising and Global Operations, David Fischer. He was a big hire of Sheryl Sandberg's—she pulled him over from Google, where he spent 7 years, finishing his run their as VP of Global Online Sales and operations. His trajectory was similar to Sandberg's, like her he worked in the Treasury department in the Clinton Administration.

Dan Rose, VP Platform & Partnerships

Also reporting to Sandberg, Dan Rose, as VP of Platform & Partnerships—overseeing mergers & acquisitions as well as strategic partnerships. He's been working with media giants to boost Facebook's role as another second screen for TV viewing, like Twitter. Rose has said that he wants to help make Facebook a better tool for content discovery. At the AllThingsD 'Dive Into Media' conference in February, he said "2013, we think, is going to be the year of movies, book, fitness—those are categories that we're really excited about."

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Rose joined Facebook in 2006 after seven years at, where he helped develop the Amazon Kindle. He dropped out of University of Michigan business school after one year to join Amazon.

Carolyn Everson, VP of Marketing Solutions

Another advertising exec, Carolyn Everson, took a turn in the spotlight as another senior woman at Facebook. Reporting to Fischer, she's known as the point person for Madison Avenue ad buyers, and is focused on convincing big ad buyers that Facebook can speak their language and help them target consumers. Everson made headlines for creating a "client Council" of senior ad execs from13 big brands and ad agencies to learn best practices from each other about how to best use Facebook's tools.

Recently Everson has been living in London, to focus on building Facebook's European ad business, which has been lagging its U.S. ad operations. She previously worked at Disney and at Microsoft.

Cory Ondrejka VP Mobile Engineering

Ondrejka came to Facebook from Linden Lab, where he co-founded virtual world Second Life, and music label EMI Group. Considered Facebook's mobile "boss," he was a key driver behind Facebook's "Home" super-app. Along with Schroepfer, Ondrejka pushed Facebook to integrate mobile developers into all its product teams, so the whole company is focused on mobile.

Jocelyn Goldstein, Facebook's Engineering Director for Mobile

Facebook's most senior female engineer, Goldstein oversees the most important growth category for Facebook products: mobile. She has become a voice on encouraging young women to enter computer science.

Naomi Gliet, Senior Director of Facebook's Growth, Engagement and Mobile Team

The second-longest serving employee at Facebook after Mark Zuckerberg, Gliet is focused on growing Facebook's user base, with a particular focus on mobile. She helped roll out Facebook beyond colleges, and now she's bringing it to new markets around the world.

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—By CNBC's Julia Boorstin. Follow her on Twitter: @JBoorstin