Senior Social Media Manager

About This Role

Overview Assembly is made of the ingredients of the modern agency, bringing together data, talent, and technology to deliver a connected set of solutions for media + more to the best brands on the planet. We’re home to more than 1,800 of the industry’s top talent across 30+ offices, who bring unmatched global omnichannel media expertise + data, technology, and business consulting capabilities that find change and fuel growth for brands worldwide. Assembly is a proud member of Stagwell, the challenger network built to transform marketing.

Learn more about Assembly here: https://www.assemblyglobal.com/

We’re currently recruiting for a Senior Social Media Manager as part of the growth of our Social team.

Responsibilities

• Develop and own organic social media strategies that drive engagement, brand awareness, and community growth.
• Lead day-to-day management of all organic social channels — from planning and briefing to publishing and community moderation.
• Manage, mentor, and support junior social team members and content creators.
• Work closely with creative teams to guide content direction and ensure a consistent brand voice across platforms.
• Create and maintain editorial calendars, ensuring timely delivery of organic content that aligns with broader campaign moments.
• Develop and execute reactive and proactive community engagement plans to strengthen online communities and brand loyalty.
• Monitor and analyse organic social performance, producing clear reports with actionable recommendations for growth.
• Collaborate with insights and strategy teams to ensure learnings from organic social feed into overall brand strategies.
• Stay up to date with platform changes, algorithm shifts, and organic best practices to evolve our approach continuously.
• Act as the key point of contact for clients on all things organic social, presenting plans, results, and growth ideas confidently.

Qualifications

• 7+ years of experience managing organic social media for brands, with at least 2 years leading a small team.
• A strong track record of growing engaged communities organically across multiple platforms.
• Excellent at writing clear, engaging copy that adapts to each platform and audience.
• Creative thinker with a strong eye for visuals and storytelling.
• Confident analysing organic metrics and turning them into insights and recommendations.
• Strong project management skills — organised, deadline-driven, and able to juggle multiple brands/accounts.
• Collaborative and confident working with internal teams and clients.
• Passionate about staying ahead of trends in organic social, creator culture, and community building.