Senior Email Marketing Manager

Senior Email Marketing Manager
Location: NP44 3AB | Full-time in Office
Department: Client Services
Reports to: Lead Marketing Manager | Line managed by Head of Service
Level: Senior

Join One of the UK's Fastest-Growing Performance Marketing Agencies!

Mamba Marketing is a dynamic and innovative marketing services provider, committed to helping businesses grow through cutting-edge marketing strategies.

We're looking for an experienced Senior Email Marketing Manager to take ownership of email strategy and delivery across our client accounts. You'll combine substantial hands-on email expertise with wider marketing knowledge to develop campaigns, improve customer journeys and drive stronger engagement, retention and revenue.

You'll work closely with our Lead Marketing Manager and wider team to connect email with other marketing activity, contribute to client strategy and help develop our email marketing service.

Key Responsibilities
Email Strategy and Customer Journeys
Develop email marketing strategies aligned with client objectives, audiences and commercial priorities
Plan campaign calendars around promotions, product launches and customer behaviour
Build and improve automated journeys, including welcome, abandoned basket, post-purchase and reactivation flows where relevant
Develop segmentation and personalisation based on customer behaviour, engagement and purchase history
Identify opportunities to improve retention, repeat purchases and the coordination of campaign and automated messages

Campaign Delivery and Quality
Manage email campaigns from briefing and copywriting through design coordination, platform builds, testing and scheduling
Ensure messaging reflects each client's brand, audience and objectives
Maintain quality checks covering copy, design, links, audience selections, exclusions, mobile presentation and timing
Coordinate approvals, assets and deadlines with account managers, creative colleagues and clients
Monitor list health, deliverability and consent practices, escalating issues and recommending improvements

Performance and Wider Marketing Contribution
Review campaign and automation performance, using engagement, conversion and revenue data where available
Turn findings into clear recommendations and practical improvements
Run structured tests across subject lines, messaging, content, offers and customer journeys
Explain attribution and measurement limitations when reporting results
Work with social, paid media and creative colleagues to coordinate wider marketing campaigns
Contribute to client strategy, identifying where email can support acquisition, retention and customer value

Team Support and Client Communication
Provide proactive client updates that clearly explain results, actions and next steps
Join client calls to discuss email strategy, performance and recommendations
Share email expertise with colleagues and support their development
Coordinate workloads and priorities with the Lead Marketing Manager
Identify delivery or capacity concerns early and escalate them appropriately
Help improve processes for campaign planning, quality checks, reporting and account management

Essential Experience and Skills
Substantial hands-on email marketing experience across multiple accounts, including ownership of campaigns and automated customer journeys
Strong working knowledge of platforms such as Klaviyo, Brevo, Mailchimp or equivalent
Experience using segmentation, personalisation and lifecycle marketing to improve engagement and retention
Confidence managing campaign builds, testing, scheduling and quality checks
Strong copywriting skills and the ability to adapt messaging to different brands and audiences
Understanding of list hygiene, deliverability, consent and responsible use of customer data
Ability to analyse performance, recognise measurement limitations and recommend practical improvements

Leadership and Account Management
Confidence taking ownership of email strategy and delivery across client accounts
Ability to contribute to wider marketing planning and work effectively with other specialists
Confidence communicating with clients, presenting recommendations and managing expectations
Strong organisation and judgement when balancing multiple accounts, deadlines and competing priorities
A proactive approach to performance concerns, with clear follow-through on agreed actions
Ability to share expertise, support colleagues and help raise delivery standards

Desirable Experience
Agency experience across a varied client portfolio
Experience managing ecommerce email programmes and customer retention activity
Experience connecting email platforms with websites, ecommerce systems or CRM tools
Experience with SMS campaigns or wider CRM activity
Experience mentoring colleagues or improving campaign delivery processes
Experience supporting pitches, onboarding clients or identifying opportunities to develop an existing account

What Success Looks Like
Clients have clear email strategies, campaign calendars and relevant automated journeys
Campaigns are accurate, timely and aligned with wider marketing activity
Testing and reporting lead to practical improvements in engagement and commercial results
List health and deliverability issues are identified and addressed promptly
Clients receive consistent updates and understand the reasoning behind recommendations
Colleagues benefit from your expertise and develop stronger email marketing skills
Report to the Lead Marketing Manager for day-to-day delivery and priorities, with the Head of Service as your line manager. Work closely with account managers, paid media, social and creative colleagues to coordinate client delivery.
What We Offer

Additional performance bonuses
Company holiday allowance
Clear and scalable career progression opportunities
Increasing responsibility and earning potential as you develop
Senior-level ownership and autonomy
Regular development, coaching and support
The opportunity to work across a broad range of clients and industries
A role where commercial contribution is directly rewarded
The opportunity to help shape and develop our Email Marketing function