Senior Account Manager:in

Senior Account Manager (Media)

Start: February 2027- Permanent - Fulltime (40 h)- 40% Homeoffice

Who we are

Critical Mass is an award-winning, full-service digital experience design agency with one obsession: the customer. We bring together bold creativity, uncompromising design, and groundbreaking innovation to build connected digital ecosystems that transform how iconic brands engage their audiences.

Across intelligence and insights, brand and creative, experience design, CRM and loyalty, social and technology, data and AI, performance marketing, and media automation, our teams are constantly pushing boundaries. We don't just keep up with what's next in digital. We create it.

As part of the Omnicom network (https://www.omc.com/) Critical Mass benefits from the resources, expertise, and global network of one of the world’s leading communications and marketing holding companies. This partnership enables us to deliver innovative, integrated solutions for our clients—locally and internationally—while maintaining the agility and creative spirit that define Critical Mass.

The Role

We are seeking a talented and driven Senior Account Manager to join our team in Switzerland, supporting one of the world’s most iconic brands. This is a unique opportunity to work on a full-service account across data, technology, and creative, delivering best-in-class customer engagement experiences for a globally recognized brand.

Key Responsibilities

• Play a pivotal role in the day-to-day management of a large-scale CRM programme, spanning multiple workstreams including BAU campaigns and special projects.
• Serve as the key day-to-day contact between internal teams and client stakeholders, ensuring seamless delivery, proactive planning, and strategic alignment.
• Report directly to the Client Services Director, offering excellent opportunities for growth and progression.
• Thrive in a high-energy, fast-paced environment, understanding the unique challenges of running a busy CRM account within an agency.
• Collaborate with a team of project managers across multiple workstreams, ensuring projects run smoothly and efficiently.
• Be forward-thinking, highly organized, and comfortable troubleshooting, course-correcting, and taking a hands-on approach.
• Build and maintain strong relationships with key client stakeholders, acting as a trusted advisor and main point of contact.
• Work collaboratively with cross-functional specialists (data, creative, tech) to ensure smooth workflow and delivery.
• Identify opportunities for process improvements to increase efficiency, reduce errors, and enhance client satisfaction.
• Uphold high standards across all deliverables, ensuring campaigns meet SLAs and internal teams are supported with any process challenges.

Role Requirements

• Proven experience in loyalty, data, or CRM account management within a fast-paced agency environment.
• Ability to own and deliver on clients’ strategic ambitions while taking a hands-on approach to day-to-day operations.
• Experience working with agency partners, both internal and external, to create integrated campaigns across channels.
• Excellent communication and stakeholder management skills.
• Highly organized, responsive, detail-oriented, and proactive.
• Comfortable managing multiple projects and deadlines simultaneously.
• A natural collaborator who thrives in a team environment but can also lead initiatives independently.
• Passionate about customer engagement, digital innovation, and delivering exceptional client service.
• Self-starter with a positive, can-do attitude.

Language Requirements

• Professional-level English is required.
• French and German language skills are a significant plus.

Ready to join a dynamic, innovative team and make an impact for world-class brands? Apply now and help us shape the future of digital customer engagement at Critical Mass, part of Omnicom .