Stakeholder Relationship & Implementation Manager

Stakeholder Relationship & Implementation Manager / Brighton (Hybrid) / £40,000 + Bonus Options
Be the Strategic Glue That Holds a Global Ecosystem Together.
Cosaris is looking for a brilliantly organised, empathetic and relationship-savvy Stakeholder Relationship & Implementation Manager to join our passionate, growing team in Brighton (or hybrid with regular visits). This is your chance to work at the heart of a flagship international retail alliance, shaping how top-tier food retailers across Europe and Asia collaborate, engage and create lasting impact together.
If you thrive on connecting people, aligning priorities, resolving blockers and driving meaningful strategic delivery — this is your role.
What’s on Offer?

• A salary of £40,000 per annum and flexible working
  
• Hybrid or Brighton-based – with regular in-person collaboration
  
• International travel – engage with senior leaders across Europe
  
• Unlimited holiday – take time when you need it, when impact is high
  
• Modern Brighton office – vibrant coworking community, great coffee
  
• Bonus scheme – share in the success you help create
  
• Career growth – high visibility, real responsibility, and cross-functional learning
  
• Meaningful work – shape a flagship programme that impacts major global retailers
  Key Responsibilities of the Stakeholder Relationship & Implementation Manager:
  You’ll lead the coordination and execution of high-impact engagement initiatives for one of our most influential clients. Partnering closely with our Managing Director and leadership team, you’ll:
  
• Build trust with senior stakeholders across a dynamic, international alliance of food retailers
  
• Orchestrate a seamless rollout of initiatives like our digital collaboration Hub and ambassador programme
  
• Align internal teams with member priorities to ensure clarity, progress and momentum
  
• Turn feedback into action, stories into strategy, and obstacles into opportunities
  
• Be the calm in the complexity — keeping projects on track, relationships strong, and results tangible
  What You’ll Bring:
  
• 5–8+ years’ experience in stakeholder engagement, partnerships, project delivery or similar
  
• A proven ability to manage complex relationships and deliver through influence
  
• Crystal-clear communication skills — empathetic, articulate and persuasive
  
• Confidence coordinating multiple workstreams and collaborating across disciplines
  
• A bias toward action, a love of structured problem-solving, and a talent for diplomacy
  
• Experience in food retail, FMCG, membership organisations or B2B services is a big plus
  Why Cosaris?
  Cosaris is a strategic engagement consultancy working with membership and multi-stakeholder ecosystems to build lasting impact through collaboration, innovation and insight.
  We’re small, nimble and ambitious — with a big vision. You’ll be joining a warm, multidisciplinary team that blends strategy, design, communication and tech to deliver truly transformational work.
  Ready to Join Us?
  If you’re a proactive connector who thrives in complexity, loves delivering value for people, and wants to make a strategic difference — we’d love to hear from you.
  Apply now with your CV and a cover letter showing why you’re the perfect fit