Senior Account Manager

Mitchell & Stones; Southampton; Hybrid; GBP 80,000 - 100,000; Full time

Job summary

A growing marketing agency in Southampton seeks a Senior Account Manager to lead client relationships and oversee the delivery of impactful digital marketing strategies. You'll manage a portfolio of clients, collaborate with a team of Digital Marketing Assistants, and ensure campaign success through strong communication and strategic insight. This role offers a flexible hybrid working model, opportunities for skill development, and a supportive team culture that values innovation and high performance.

Benefits

Training and up-skilling provided

Flexible working hours

26 days holiday

Generous Christmas Closing period

Qualifications

• Proven experience in managing client accounts and digital marketing strategies.
• Strong leadership skills with the ability to manage a small team.
• Exceptional verbal and written communication skills.

Responsibilities

• Manage a portfolio of client relationships, ensuring satisfaction and growth.
• Lead a team of Digital Marketing Assistants, delegating tasks effectively.
• Create and execute marketing plans based on client insights and data.

Skills

Proactive communication

Client relationship management

Digital marketing strategies

Team leadership

Performance analysis

Education

Relevant marketing certifications

Tools

Google Analytics

PPC tools (e.g., Meta Ads Manager)

SEO tools (e.g., ahrefs)

Project management tools (e.g., Asana)

Job description

About Us

Mitchell & Stones act as an outsourced marketing department for organisations across the UK and Europe. Our clients trust us to consult and strategise on all areas of their marketing activity, and using our in‑house team and trusted partners, we execute those strategies to help our clients meet their goals and grow.

We’re not your standard digital agency. We’re changing the way companies work with external partners by offering a comprehensive, embedded marketing solution. Our clients see us as an extension of their team — a trusted advisor and delivery partner — and we love flexing our creative and strategic muscles to drive powerful, long‑term results.

Our Culture

At Mitchell & Stones, you’ll find a team that thrives on collaboration, creativity, and continuous improvement. We believe in curiosity and courage — asking the hard questions, trying new things, and always striving to be better. We don’t settle for “how it’s always been done.” We celebrate initiative, support each other’s growth, and see every challenge as an opportunity.

The Ideal Candidate

We’re looking for an experienced, proactive and client‑focused Senior Account Manager with a strong digital marketing background and exceptional relationship management skills. You’ll have experience leading client accounts, managing teams, and overseeing a range of digital services including paid media, content, SEO, social and creative production.

You’ll be a confident communicator, capable of owning client conversations, leading performance reviews, and guiding strategic direction. Most importantly, you’ll care deeply about your clients’ success and understand the value of consistency, quality and innovation in service delivery.

On a personal level, you’ll be organised, commercially minded, emotionally intelligent and passionate about marketing. You’ll be eager to lead, support and inspire those around you while maintaining high standards and a solutions‑first attitude.

How We Work

We operate a hybrid working model. This allows you to split your working week between the office and working remotely, depending on your preferences and workload.

The Role

As a Senior Account Manager at Mitchell & Stones, you’ll lead the charge in managing a portfolio of client relationships and overseeing the delivery of high‑impact digital marketing strategies.

You’ll serve as the primary point of contact for your clients, working closely with them to understand their goals, build trust, and ensure satisfaction. You’ll be responsible for creating and executing marketing plans, guiding your delivery team, and using in‑house specialist resources — including PPC, SEO, creative and design — to bring campaigns to life.

In this role, you’ll manage a team of 2‑3 Digital Marketing Assistants, delegating tasks and ensuring everything runs smoothly. You’ll also oversee timelines, budgets and team output, ensuring campaigns are delivered efficiently and effectively. From briefing creatives to refining strategies based on performance data, this is a varied and impactful role that blends leadership, delivery and strategic oversight.

Key Responsibilities

• Serve as the lead contact for an assigned portfolio of clients, ensuring satisfaction, retention and growth.
• Develop a deep understanding of each client’s brand, goals and performance metrics.
• Present strategic plans and campaign performance reports to clients, positioning Mitchell & Stones as a trusted advisor.
• Regularly report on key client account performance to the Director and seek strategic guidance where required.
• Manage and support a delivery pod consisting of 2‑3 Digital Marketing Assistants.
• Set clear expectations, delegate tasks, and ensure high standards of delivery across all client work.
• Collaborate with in‑house PPC experts, SEO consultants, creatives and designers to deliver integrated marketing campaigns.
• Brief, coordinate and quality‑check the work of specialist resources to align with the client’s strategic direction.
• Lead the planning and execution of multi‑channel campaigns (organic and paid), managing timelines, budgets and results.
• Analyse and report on key digital metrics using tools such as Google Analytics, Meta Ads Manager and SEO tools.
• Make data‑driven decisions to optimise campaigns and ensure continual improvement.
• Contribute to strategic planning, aligning client goals with broader agency priorities.
• Support a culture of high performance, continuous improvement and collaboration within your team.

Bonus Points

• Experience with tools such as Google Analytics, ahrefs, Asana, Meta Business Suite or similar.
• Relevant marketing certifications (e.g. Google Ads, HubSpot, CIM).
• An understanding of creative project workflows and briefing best practices.

Benefits

• Opportunity to develop your skills and progress
• Training and up‑skilling provided
• Flexible working hours
• 26 days holiday
• 2 personal days per year
• Hybrid Working Model
• Play a crucial role in a small but rapidly growing agency
• Generous Christmas Closing period

Base salary negotiable based on experience