Bring your negotiation skills to the next level

Tactics and techniques

Develop your team's own persuasion arsenal.

Convey & persuade

Reinforce your team confidence.

Competitive advantage

Train the right skills with customized scenarios.

Experienced trainers

Access the knowledge from our subject matter experts.

Niklaus Jäger

Swiss Armed Forces

“The KFK could benefit from Constantin's negotiation expertise in developing two customized negotiation courses for the highest ranked officers of the Swiss Armed Forces”

Markus Bölke

PHAR

“Our collaboration with Constantin goes beyond negotiation skills and sales mastery for PHAR. Through our collaboration a real friendship has developed founded on mutual respect and our passion for conviviality!”

Cristina Fonseca

Rockstart

“With this collaboration Rockstart can equip the start-up cohorts with the best tools to negotiate with investors and commercial partners. ”

Sébastien Junod

Swiss Connect Academy

“Negotiating with Constantin is playful and a constant opportunity to learn. Beyond the negotiation, we benefit from a solid and proactive partnership with new solutions the Swiss Connect Academy students. ”

Kevin Grangier

Kevin Grangier

“Beyond the friendship that binds us, with Constantin we bring a unique solution, rhetoric at the service of negotiators. Together, we will transform your ability to achieve your goals in the long term!”

Marcel Juen

Marcel Juen

“As a snipers.sale partner, my team and I provide razor-sharp video and audio analysis of customised training sequences. Participants benefit from concrete tips and tricks for their practice that they can apply immediately. This improves their visual and vocal performance.”

Manuel Hartmann

The Sales Playbook

“With snipers.sale the Sales Playbook benefits from a negotiation expert that supports founders in their road towards sustainable success. Our collaboration dates back to 2021 and it is a great pleasure to have Constantin and snipers.sale as a trusted partner.”