Senior Consultant

Welcome to Gain Conversion
Gain is a creative-led, insight-driven company that blends data, tech and creativity. We believe the best ideas emerge where intelligence and creativity unite, where insight sparks imagination, and where innovation turns possibility into progress. We are explorers of new frontiers, shaping bold strategies that move people, brands, and businesses forward. Individually and together, our specialist teams provide the vision, data, and confidence brands and organizations need to make braver, more impactful decisions.

At Conversion, we\’re a team of global CRO experts who help brands optimize their digital ecosystems, websites, platforms, and customer experiences to drive real, measurable growth. We intend to prove that evidence-based decisions get the best results, and our people and unique culture are the fuel. Here, you\’ll work with talented, passionate people who challenge you to do your best every day.

If this sounds like an adventure that you\’d like to be part of, then keep reading and apply below

The Role
As a Senior Experimentation Consultant, you will take ownership of the experimentation strategy and overall direction for your assigned accounts, ensuring programs are strategically aligned with client business objectives and deliver measurable impact. You will be responsible for setting and driving the big-picture experimentation approach, ensuring testing roadmaps, prioritization, and insights are effectively leveraged to support client growth.

You will work closely with Project Managers and the broader delivery team to execute experimentation programs while collaborating with Principal Consultant to align on strategic direction and secure sign-off on key decisions.

Beyond client delivery, you will mentor and up skill Consultants, support the Director of Experimentation and Principals in knowledge-sharing efforts, and contribute to the growth and development of the consultancy team.

You will also play an active role in account performance and growth, contributing to discussions on profitability, performance, and identifying opportunities for expansion, while ensuring all strategic decisions are made in alignment with the Principal Consultant.

This role sits within the UK team, working alongside our global counterparts to drive high-impact strategies for our clients.

Responsibilities
Account experimentation strategy & execution

• Drive & own the experimentation strategy for assigned client accounts, ensuring structured, data-driven approaches to testing and optimization while keeping the Principal informed and securing sign-off on key decisions
• Leverage all relevant frameworks and tools within Conversion\’s experimentation toolkit, selecting the right methodologies to drive performance for each client
• Work closely with the delivery team to ensure experiments are executed efficiently, troubleshooting potential roadblocks and maintaining alignment on priorities
• Oversee the development of research deliverables where experiments are not the immediate outcome, ensuring insights are clearly structured and presented to drive client decision-making
• Conduct and facilitate bi-annual strategy reviews, ideation sessions, and other key workshops to ensure continued program maturity and alignment with business objectives
• Ensure experimentation insights and research findings are communicated effectively, crafting compelling narratives that reinforce business value and influence client decision-making

Client leadership & account growth

• Take ownership of the overall performance of assigned accounts, ensuring experimentation programs drive measurable impact and align with client business objectives
• Contribute to uncovering the client\’s bigger picture—gaining a deep understanding of their business objectives, challenges, and expectations beyond experimentation to ensure alignment with their broader goals
• Lead strategic discussions on client objectives, challenges, and expectations for their experimentation program, ensuring we recommend the right solutions—whether experiments, research initiatives, or other evidence-based approaches
• Identify and shape commercial opportunities within accounts, ensuring experimentation and research support client growth and long-term success
• Act as a trusted advisor to clients, fostering strong relationships, driving program maturity, and positioning experimentation as a critical business function
• Ensure alignment with the Principal Consultant on all strategic, big-picture, and commercial decisions

Mentorship & team development

• Mentor and support Consultants, providing guidance on experimentation methodologies, strategic thinking, and client management to enhance their effectiveness
• Facilitate structured knowledge-sharing initiatives, ensuring insights from client work are documented and leveraged for broader team learning
• Support the Director of Experimentation and Principal Consultants in upskilling the team by delivering training sessions and fostering a culture of continuous development
• Provide regular coaching and structured performance feedback, ensuring Consultants have clear development pathways and the support needed to progress in their roles

Thought leadership & internal projects

• Develop deep expertise in Conversion (but not limited to) experimentation methodologies, ensuring mastery of frameworks, statistical principles, and strategic tools to drive high-impact testing programs
• Drive innovation in experimentation methodologies, contributing to internal discussions on best practices and evolving strategies
• Contribute to industry thought leadership, including blog content, case studies, or speaking engagements where relevant
• Assist the Director of Consultancy and Sales team in pitches and business development efforts by providing strategic experimentation expertise

Requirements

• Post secondary education degree, preferably in Marketing or Business or equivalent work experience
• 3+ years experience at an interactive or marketing agency in client management or an in-house client-side digital marketing role.
• Direct experience in leading the strategy on successful client projects and/or engagements.
• Experience working with external clients and building relationships virtually and in-person
• Experience or a working understanding of web & digital A/B testing tools (Adobe Target, Optimizely, VWO, Google Optimize, etc.)
• Experience building reports and analyzing data in multiple Digital Analytics platforms (Google Analytics, Adobe Analytics, Heap, Amplitude, Mixpanel, etc.) and other digital research tools such as Content Square, Clarity, Quantum Metrics, Full Story, Hotjar, Clicktale, CrazyEgg etc.
• Strong working understanding or direct experience in web development (HTML/CSS/JS) as it relates to experiment feasibility and scoping.
• Excellent communication skills (written and verbal) and comfort communicating with clients and prospects at all levels
• Ability to manage multiple projects in a fast paced environment
• A strong EQ and adaptability in communication style as the situation requires.
• Experience in performance management, providing mentorship/leadership to team members, resulting in the success of the team, as well as the individual team member.
• Understanding of the different UXR methodologies and their applications
• Hands-on experience with advanced testing methodologies such as machine learning, bandit algorithms, and personalization
• Some travel is expected for this position- around 10% of the time

Behaviours

• Strategic – able to see the bigger picture within organizations in order to develop solutions to address core client needs
• Evidence-driven – able to effectively use data & research insights, rather than gut feeling, to guide decisions and strategies
• Assertive – able to confidently justify your ideas, strategies, and recommendations with strong evidence and knowledge when questioned
• Comfortable in a fast paced environment – able to make quick decisions in front of clients with determination
• A problem solver – able to think quickly on your feet to come up with creative solutions to unique problems
• Able to think critically and analyze data to interpret meaningful consumer behavior insights
• A natural storyteller – able to craft and present compelling stories around complex concepts and ideas
• An empathetic and supportive mentor & coach – are you able to understand and adapt your coaching methods to diverse learning styles to uplevel team expertise, skills, and knowledge

Benefits

• Private Medical Insurance
• BUPA Life Assurance
• Income protection
• Employee Assistance Program
• Cycle to Work salary sacrifice scheme
• Tech & Wearables salary sacrifice scheme
• Octopus EV Scheme
• Discounts and deals on a range of items from hotels, holidays and hormone testing to cinema, gyms and will writing

GAIN is an equal opportunities employer and positively encourages applications from suitably qualified and eligible candidates regardless of sex, race, disability, age, sexual orientation, gender reassignment, religion or belief, marital status, or pregnancy and maternity. We believe that diversity and inclusivity make our teams better, so it is our priority to create an equitable and inclusive workplace where our goals, initiatives, and commitments to action are shaped and strengthened by our team\’s voices. Putting People First, one of our core values, means we never lose sight of humanity, care, and impact.

Disclaimer:
we never request any form of payment or fees from candidates at any stage of the recruitment process. If you are contacted by anyone claiming to represent our company and asking for money or personal financial details, please report it immediately to
. All genuine communication will come from official company channels.