Madeline Kostopulos: Age, Construction Career & The Traitors: New Blood

Madeline Kostopulos: Age, Construction Career & The Traitors: New Blood

Madeline Kostopulos is bringing a very different kind of experience to The Traitors: New Blood. At 26, the San Diego contestant works in construction management, where organization, communication and keeping several moving parts under control are part of the job. Inside a Scottish castle filled with strangers who may be lying to her, those same qualities could become surprisingly useful.

NBC's first all civilian season features 22 contestants selected from more than 80,000 applicants, with the cast competing for a prize of up to $250,000. Kostopulos enters the game as one of the younger players and has already made it clear that she would rather begin as a Faithful. See the full cast of The Traitors: New Blood.

Madeline Kostopulos Quick Facts

Full Name	Madeline Kostopulos
Age	26
Hometown	San Diego, California
Occupation	Construction Manager
Education	University of South Carolina
The Traitors Role	To be updated after the premiere
Self-Declared Superlative	Most Likely to Make Too Many Jokes
Instagram	@madelinekostopulos

Who Is Madeline Kostopulos?

Kostopulos is a San Diego based construction professional whose background goes beyond the simple job title attached to her Traitors: New Blood bio.

Her professional profile shows experience across business operations, analysis, scheduling and construction related work. She has worked in roles including business analysis and business operations before moving into the construction side of management. That mix suggests someone who is comfortable dealing with deadlines, people and the small details that can easily get lost when several things are happening at once.

She studied at the University of South Carolina, attending from 2018 through 2022. Her listed education includes a Bachelor of Arts in Insurance and Risk Management, giving her another layer of business focused training behind her current career.

Madeline Kostopulos' Construction Career

Construction management may not sound like obvious preparation for a reality competition, but much of the work involves coordinating people and keeping a larger project moving toward a goal.

Kostopulos' LinkedIn profile shows experience as a Business Office Manager in the construction industry. Her listed responsibilities connect with areas such as project management, engineering, procurement and construction. Before that, she built experience through business analyst, internship, operations and scheduling positions.

That career path gives Kostopulos a useful combination of organization and people skills. The game of The Traitors is obviously not a construction project, but players still have to process information, judge personalities and decide which relationships are worth investing in. Her professional background could make that part of the game especially interesting to watch.

Why Madeline Wants to Be a Faithful

Kostopulos has already answered one of the biggest questions facing every new contestant: would she rather be a Faithful or a Traitor?

Her preference is the Faithful. She said she wants to sniff out the Traitors and described herself as a strong team player and leader who can keep the atmosphere light.

That last part fits her self declared cast superlative too. Kostopulos is officially the contestant who is “Most Likely to Make Too Many Jokes,” giving her a lighter personality profile than some of the more naturally intimidating players in the cast.

She also talked about keeping her integrity and remaining genuine rather than entering the castle with an elaborate character to play. Her approach is to understand the bigger situation and work backward from what she thinks is necessary to win.

Her Strategy for The Traitors: New Blood

Kostopulos' pre show strategy is built around staying authentic.

Rather than trying to become the loudest person in the room or forcing herself into a leadership position immediately, she plans to rely on her intuition, personality and ability to understand complicated situations. She has said that she is comfortable leading when necessary but also wants to keep the game fun for the people around her. 2

That could become an important balance. In The Traitors, being too quiet can make someone suspicious, while becoming the most vocal player can put an unnecessary target on their back. Kostopulos appears to be aiming for the middle ground: social enough to build trust, but analytical enough to recognize what is happening around her.

Madeline Kostopulos' Age and San Diego Background

Madeline Kostopulos is 26 years old and is from San Diego, California. NBC and entertainment coverage of the cast identify her as a construction manager from San Diego.

She is part of one of the youngest groups in this season's cast, which ranges from 23 to 65. That creates an interesting dynamic because the competition includes contestants with very different professional and life experiences.

Madeline Kostopulos on Instagram

Kostopulos is on Instagram at @madelinekostopulos. The account is also listed alongside her official cast information by Cosmopolitan.

Her social presence gives fans another way to follow her outside the castle as the season develops. Her role, alliances and eventual outcome can be added here as new episodes reveal what happens.

Madeline Kostopulos on The Traitors: New Blood

The Traitors: New Blood premieres September 17, 2026, on NBC, with episodes available to stream the following day on Peacock. The season marks the franchise's first U.S. edition built entirely around civilian contestants rather than established reality stars.

For Kostopulos, the challenge will be turning the qualities that have helped her professionally into an advantage in a game where trust is never straightforward. Her construction and business background may help her stay organized, while her humor and team oriented personality could make it easier to build relationships.

Whether that combination helps her become a reliable Faithful, draws her into the center of the game, or eventually makes her a target will become clearer once the castle doors open.

Madeline Kostopulos: Season Status

Role	Not yet revealed
Episode Status	Season has not premiered
Elimination	Not applicable yet
Final Placement	To be updated

This page will be updated during The Traitors: New Blood with Madeline Kostopulos' confirmed role, episode developments, alliances, elimination status and final placement.