about
OUR STORY
Stronger Bookings was founded in 2010 with one clear mission: to support and elevate the true spirit of hardcore punk across Europe and beyond. What started as a DIY passion project rooted in decades of touring experience has grown into one of the most respected independent hardcore booking agencies worldwide.
With a hands-on approach, clear communication, and a deep understanding of the culture, we focus on long-term partnerships and sustainable growth for the bands we work with. Hardcore is more than music. It’s community, commitment, and staying true to your roots.
At Stronger Bookings, we represent and have worked with some of the most influential acts in the scene, building a diverse roster of both established veterans and rising artists from around the world.
We are proud organisers of Revolution Calling Festival, Europe’s biggest indoor hardcore punk festival held yearly at Klokgebouw in Eindhoven. A multi-stage, all-ages celebration that draws fans and bands from across the globe. Revolution Calling has become the home of worldwide hardcore, offering unforgettable live experiences, barrier-free pits, and lineups that mix legendary names with new-breed powerhouses
MEET THE PEOPLE BEHIND
STRONGER BOOKINGS
Martijn van den heuvel
Martijn van den Heuvel has been touring the world since 1997 with hardcore band No Turning Back, helping shape the sound, spirit, and global reach of European hardcore. Decades on the road have allowed him to build an extensive international network and earn deep respect within the worldwide scene. Not just as a musician, but as a connector and driving force behind countless shows and tours.
As the founder of Stronger Bookings and the driving force behind Revolution Calling Festival, Martijn has translated that experience into creating real opportunities for bands and unforgettable moments for audiences. Known for his integrity, work ethic, and unwavering commitment to authentic hardcore, he continues to bridge borders, build long-term relationships, and strengthen the global community that has defined his life’s work.
Sander Janssen
Sander Janssen is a senior agent at Stronger Bookings and a passionate force within the hardcore and punk scene. Getting his start at a young age, Sander quickly developed a sharp ear for new talent and an instinct for the raw energy that drives underground music. Over the years, he has built a strong reputation for discovering and supporting emerging bands, helping many of them take their first serious steps onto bigger stages across Europe.
Now in his early 30s, Sander combines years of hands-on experience with an unwavering enthusiasm for the scene. His work goes far beyond traditional booking he’s deeply connected to the community and always on the lookout for the next band ready to break out. In addition to working closely with a wide range of artists, Sander also contributed to the booking of the Belgian hardcore punk festival Vlamrock, one of the key gatherings for fans of the genre.
Driven by passion, instinct, and a genuine love for heavy music, Sander continues to push new talent forward while helping keep the spirit of hardcore alive and thriving.
Apostolos Mokas
Apostolos Mokas is a booking agent, promoter, and music industry professional whose work bridges underground culture and international touring circuits. With a career spanning multiple roles, Apostolos has built a reputation for sharp curation, strong artist development, and seamless live execution.
He is the founder of World’s Appreciated Kitsch, an independent distro and label focused on distinctive, forward-thinking sounds from across the global hardcore punk scene. Through this platform, he has supported emerging and established artists alike, creating meaningful connections between scenes and audiences.
Operating between Amsterdam and Athens, Apostolos actively books and promotes shows that reflect his wide-ranging musical background. At Stronger Bookings, Apostolos brings dedication, adaptability, and a global network, driven by a genuine passion for the hardcore and punk scene.
Marcel van der Vliet
Marcel van der Vliet is the operational backbone of Stronger Bookings. As Head of Backoffice, he keeps everything behind the scenes running smoothly so artists and agents can focus on what they do best. With years of experience as a driver, tour manager, and festival production professional, Marcel understands touring from the inside out, from long drives and tight schedules to last-minute changes and high-pressure show days
.
His background in festival production and touring gives him a sharp eye for detail and a calm, solution-driven approach to logistics. From transport and accommodation to contracts, budgeting, and show advancement, Marcel bridges the creative and operational sides of the business. At Stronger Bookings, he’s the steady engine behind the scenes, making sure every show runs stronger.