Facebook has launched the largest executive shakeup in its 15-year history, with major changes being made to the leadership teams of core apps like WhatsApp, Messenger and Instagram.

As part of the move, the firm's products have been simplified into three focus areas - apps, product services and new platforms and infrastructure, which includes a dedicated team around blockchain technology.

But a closer look at the new executive organization has left many feeling that these are stale changes, as Facebook appears to have a serious lack of women or people of color in leadership positions responsible for products and engineering.

Scroll down for video

In an unprecedented management shakeup co-founder Mark Zuckerberg remained chief of Facebook, with chief operating officer Sheryl Sandberg his second-in-command

The restructuring was announced internally to Facebook employees on Tuesday, according to Recode, which first reported the move.

Of the 15 executive appointments, many were quick to note that almost all of the top positions are now being held by white males.

The only female that's a part of the lineup is Naomi Gleit, a longtime Facebook employee, who now runs community growth and integrity as well as the firm's social good products.

Facebook does have several women in other influential product roles at the company, including Deb Liu, who runs Facebook's classified ad section, Marketplace, Fidji Simo, a vice president of product who handles video, new and Julie Zhuo, who oversees product design.

Chief operating office Sheryl Sandberg, who's also not included in the latest executive shuffle, heads up the business side of Facebook.

However, that didn't stop many people from being peeved by the changes.

Baroness Martha Lane Fox, who co-founded LastMinute.com and karaoke bar chain Lucky Voice, covertly pointed to the firm's all-male leadership in a tweet saying: 'Facebook has just reorganized its product team. Notice anything?'

Even though there are women overseeing other areas of Facebook's product efforts, male executives are in charge of its major apps - the core Facebook product, Instagram, WhatsApp and Messenger, which reach 5 billion people each month, according to Quartz.

So whether the firm intends to or not, it sends a message to consumers and investors that diversity and equal representation may not be top of mind for Facebook.

As one Twitter user pointed out, the leadership team 'doesn't represent [Facebook's] user base at all'.

Facebook continues to make strides with hiring diverse staff in its top ranks, but a company spokesperson told Quartz that it still 'has a long way to go'.

In its latest diversity report, women made up 28% of senior leadership and were represented in 19% of technical roles.

Overall, women make up roughly 35% of the company vs. their male counterparts, which account for 65% of Facebook's workforce.

Sandberg has spoken at length about the importance of equal gender representation in corporate America and, in particular, Silicon Valley.

'Nearly 50% of men think that when just 1 in 10 senior leaders in their company is a woman, that's sufficient,' Sandberg wrote in a recent editorial for the Wall Street Journal.

'And remarkably, a third of women agree. When so many people see a leadership team that's only 10% women -- who let's remember, are half the population -- and think, "that's good enough", it's a sign that we're too comfortable with the status quo'.

Women were noticeably lacking from Facebook's new executive structure. The lone female included in the change was Naomi Gleit (pictured), who runs community growth and integrity

WHO IS IN FACEBOOK'S NEW EXECUTIVE LEADERSHIP TEAM? Facebook has launched the largest executive shakeup in its 15-year history, with major changes being made to the leadership teams of core apps like WhatsApp, Messenger and Instagram. As part of the move, the firm's products have been simplified into three focus areas -- apps, product services and new platforms and infrastructure, which includes a dedicated team around blockchain technology. There were no new hires as part of the restructuring. All the appointments involved shifting existing executives into new roles, with CEO Mark Zuckerberg still overseeing everyone. Here's who's heading each area of Facebook's product and engineering groups: New platforms and infrastructure Mike Schroepfer, Chief Technology Officer

Jay Parikh, Engineering, Infrastructure and data privacy

Jerome Pesenti, Artificial Intelligence

David Marcus, Blockchain

Andrew 'Boz' Bosworth, Augmented Reality/Virtual Reality Central product services Javier Olivan, Vice President of Growth

Mark Rabkin, Advertisements

Alex Schultz, Analytics

Naomi Gleit, Integrity, growth, product management Family of apps Chris Cox, Chief Product Officer

Stan Chudnovsky, Messenger

Will Cathcart, Facebook app

Chris Daniels, WhatsApp

Kevin Systrom, Instagram Advertisement

Many were quick to point out at the time that the comments were slightly ironic given the fact that 72% of the company's top executives are men.

What's more, only two out of Facebook's eight board members are women.

It's possible that more women weren't a part of the latest reorganization because it involved shuffling existing executives into new roles, meaning there were no new hires from outside the company.

Chris Cox, a longtime member of Zuckerberg's inner circle, was put in charge of Facebook's core application as well as smartphone services Instagram, WhatsApp, and Messenger, the California-based company confirmed.

David Marcus said in a post on the social network that, after four years in charge of Messenger, he is "setting up a small group to explore how best to leverage blockchain across Facebook."

He expressed confidence in his Messenger successor, whom he identified as Stan Chudnovsky.

Facebook COO Sheryl Sandberg (pictured) has spoken at length about the importance of equal gender representation in corporate America and, in particular, Silicon Valley

While not directly mentioned, the executive moves confirmed on Tuesday come as Facebook strives to move past the recent privacy scandal involving Facebook and Cambridge Analytica.

Longtime Facebook executive Javier Olivan will be in charge of a "central product services" division handling features such as security and ads that are common to various services run by the social network.

While more than a dozen executives saw their jobs change, none appeared to be leaving the company, US media reports indicated.

WhatsApp co-founder Jan Koum last month announced his departure from Facebook, which bought the smartphone messaging service four years ago for $19 billion.

Koum said in a post on his Facebook page that he is taking time off to pursue interests such as collecting air-cooled Porsches, working on cars and playing ultimate Frisbee.

US media reports indicated that a disagreement with Facebook over the privacy of user data may have also been a factor in Koum's decision to quit his position as a high-ranking executive and likely leave his seat on the board at the leading online social network.

WHAT IS THE CAMBRIDGE ANALYTICA SCANDAL? Communications firms Cambridge Analytica has offices in London, New York, Washington, as well as Brazil and Malaysia. The company boasts it can 'find your voters and move them to action' through data-driven campaigns and a team that includes data scientists and behavioural psychologists. 'Within the United States alone, we have played a pivotal role in winning presidential races as well as congressional and state elections,' with data on more than 230 million American voters, Cambridge Analytica claims on its website. The company profited from a feature that meant apps could ask for permission to access your own data as well as the data of all your Facebook friends. It was initially estimated that the firm was able to mine the information of 55 million Facebook users even though just 270,000 people gave them permission to do so. But, Facebook has since revealed the number was actually as high as 87 million. This was designed to help them create software that can predict and influence voters' choices at the ballot box. The data firm suspended its chief executive, Alexander Nix, after recordings emerged of him making a series of controversial claims, including boasts that Cambridge Analytica had a pivotal role in the election of Donald Trump. This information is said to have been used to help the Brexit campaign in the UK. Advertisement

While not directly mentioned, the executive moves confirmed on Tuesday come as Facebook strives to move past the recent privacy scandal involving Facebook and Cambridge Analytica.

Zuckerberg spent most of the past month on the fallout from revelations on the hijacking of personal data by the political firm, seeking to assuage fears that the California-based internet colossus can safeguard privacy while making money by targeting ads based on what people share about themselves.

The social network is also among online platforms that came under fire for being used to spread misinformation and foment division ahead of the US presidential election in 2016.