Rachel Maddow’s trusted right-hand man, Andrew Dallos, has announced his departure after nearly 25 years at MSNBC, underscoring growing instability within the embattled network.

Dallos, 59, who was instrumental in launching The Rachel Maddow Show in 2008, confirmed his exit on Wednesday with an emotional Instagram post.

‘After nearly 25 years, my time at MSNBC has come to an end. I’ve made the difficult decision to leave the company I’ve called home for nearly a quarter of a century,’ he wrote.

In the post, accompanied by a photo of NBC Studios in New York, Dallos expressed gratitude for the experience.

‘During my time here, I’ve been privileged to work alongside some amazing colleagues. Special thanks to Rachel Maddow for the opportunity to join her team on the very first day of her show and giving me the journey of a lifetime. Special thanks to Cory Gnazzo for his steady leadership.’

Dallos also acknowledged the broader shakeup at MSNBC, which has included sweeping layoffs and restructuring amid its corporate spinoff.

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Rachel Maddow’s (pictured left) right-hand man, Andrew Dallos, has announced his departure after nearly 25 years at MSNBC

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Andrew Dallos (pictured), 59, who was instrumental in launching The Rachel Maddow Show in 2008, confirmed his exit on Wednesday with an emotional Instagram post

‘As many of you are preparing to move to SpinCo, please know that I’ll be cheering you on every step of the way,’ he wrote, referencing the newly formed independent media entity Comcast is creating out of NBCUniversal’s cable and digital assets.

Even though Dallos is exiting, the veteran producer celebrated a ‘full-circle’ moment, noting that his daughter will soon follow in his footsteps.

‘Although today is my last day with TRMS, it’s only the beginning for my daughter, Ashley, who will be interning for The 11th Hour starting in June, following in her dad’s footsteps. Funny how life has come full circle,’ he added.

‘I hope our paths cross again down the line. Until then, I wish you all the best.’

Dallos’ departure coincides with a major transition for Maddow’s show, which is set to return to airing just one night a week on Mondays after briefly expanding to five nights to cover President Trump’s first 100 days back in office, according to TheWrap.

His exit also comes amid deep cuts across the network.

According to The Guardian, most producers for Maddow’s and Joy Reid’s shows – including high-profile figures like Katie Phang, Jonathan Capehart, Ayman Mohyeldin, and José Díaz-Balart – have been let go, with the option to reapply or take severance.

While, Maddow’s executive producer Cory Gnazzo and several senior producers will remain.

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Dallos (center left in green) and Maddow (center right in black) celebrating the 15th Anniversary of the Rachel Maddow Show in New York City alongside MSNBC colleagues

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Though Dallos is exiting, the veteran producer celebrated a ‘full-circle’ moment, noting that his daughter will soon follow in his footsteps

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Dallos’ departure coincides with a major transition for Maddow’s show, which is set to return to airing just one night a week on Mondays. Pictured: Maddow interviews Hillary Clinton on her show in 2019

The star host however has not shied away from criticizing the network’s actions.

Maddow expressed concern for the dozens of producers and staff who work behind the scenes, saying that they were ‘really being put through the wringer’, facing potential layoffs and being ‘invited to reapply for new jobs’.

‘That has never happened at this scale, in this way before when it comes to programming changes, presumably because it’s not the right way to treat people, and it’s inefficient and it’s unnecessary and it kind of drops the bottom out of whether or not people feel like this is a good place to work, and so we don’t generally do things that way,’ Maddow said on air.

‘Personally, I think it is a bad mistake to let her [Reid] walk out the door… It is also unnerving… both of our non-white hosts in prime time are losing their shows, as is Katie Phang on the weekend. That feels worse than bad… That feels indefensible and I do not defend it.’

MSNBC has characterized the changes as a staff reallocation rather than mass layoffs, but the fallout has left lingering questions about its programming future.