Senior Planning Executive

JOB OVERVIEW

About The Role

As Senior Planning Executive at December19, you will join a growing planning team at an agency that believes the best media strategies start with better questions.

This is a planning role with real weight behind it. You'll be responsible for building integrated campaign strategies, translating brand ambition into brilliant media planning, and ensuring that every channel decision is rooted in sharp, strategic thinking. It's a role for someone who doesn't just read a media plan, but interrogates it.

Based in London, you'll work as a core member of the planning team, collaborating closely with offline and digital specialists across markets. You'll be a key client-facing voice, presenting media planning recommendations to senior stakeholders and owning the through-line from annual strategy to tactical delivery. At December19, we don't execute briefs, we challenge them. We're looking for someone who thrives in that environment.

About You & Your Role

You're a confident, curious planner who genuinely cares about the quality of the work. You understand full-funnel media, you're comfortable talking to clients about how paid, owned and earned channels connect, and you take real pride in the detail.

Day-to-day, you'll be building planning strategies that help clients achieve, and exceed, their marketing objectives, collaborating with specialist teams to develop and own integrated campaign plans. You'll manage campaign approvals, track pacing, and stay close to campaign evaluation so insight feeds directly back into optimisation and future planning.

You'll also bring the right attitude. An innate curiosity. A willingness to share ideas and push thinking. A positive, can-do approach that raises the standard of everyone around you.

About The Agency

December19 is The Bigger Question Agency. We deliver competitive advantage through strategic interrogation, asking the uncomfortable questions that others avoid, challenging assumptions, and co-creating strategies that out-think the competition. Because growth brands deserve partners who push thinking forward, not just execute briefs.

Founded on principles of full transparency, independence, and ethical practice, we've built an agency where strategic thinking comes first. We work with growth brands and scale-ups who want a genuine strategic partner, not an order-taker.

We're a London-based independent with a culture built around intellectual curiosity, honest challenge, and doing work we're genuinely proud of.

Flexible Working

We operate a hybrid working model, with time split between our London office and remote working. We believe great work happens when people have the flexibility to manage their working day in a way that suits them, balanced with the energy and collaboration that comes from being together in person. We're open to conversations about working arrangements as part of the application process.

Diversity, Equity & Inclusion

At December19, we're committed to building a team where difference is valued and everyone can bring their whole self to work. We believe diverse perspectives make our thinking sharper and our work better, and we're committed to creating an environment of genuine inclusion and belonging. If you'd like to discuss any adjustments to support you through the recruitment process, please don't hesitate to get in touch.

If this sounds like you, we’d love to hear from you! Please send your CV and covering letter to hello@december19.co.uk and we’ll be in touch!