Client Partner (12M Maternity Contract)

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About Us

At Assembly, our mission is to find the change that fuels growth. We apply this principle to the work we do with our clients and to how we engage with our people. We’re a modern global agency bringing together media, data, technology and talent to make brands perform.

In March 2022 we were named Ad Age’s first ever Purpose‑Led Agency of the Year, recognised for our mission to leave the world better than we found it. This year we became B Corp certified after a two‑year journey. We’re proud to have created a culture where diversity of thought, experience and background are valued, fostering continuous learning, adaptability and a shared passion for meaningful impact.

Assembly is a global community of digitally‑led experts, home to 1,500 talented people across 25 offices worldwide. Together we create unique data, technology and media solutions that enable faster and smarter problem‑solving within an inspired, collaborative workplace.

Assembly is poised for its next chapter of growth. We’re a meritocratic, high‑performance business with a progressive outlook and a growth mindset in all that we do. The core DNA of Assembly lies in digital performance marketing; new and existing clients ask us to extend this expertise across all media, connecting traditional channels with digital methods of execution, measurement and automation. We embody the values: Show Up, Make Change and Win Well, encouraging personal and collective growth, embracing obstacles, and approaching success with integrity and collaboration.

Overview

The Client Partner owns senior client partnerships across a diverse portfolio spanning categories such as professional services, travel and hospitality, consumer lifestyle, design‑led brands and global events / culture platforms. They set the strategic agenda, ensure commercial health and lead integrated delivery across markets and disciplines. The role acts as the primary escalation point, strategic sponsor and commercial owner for accounts, while developing future leaders and contributing to the broader Client Leadership community.

Responsibilities

Senior Client Partnership

• Own senior stakeholder relationships and be viewed as a trusted strategic partner.
• Lead high‑stakes conversations on business priorities, growth, operating models and performance.
• Set the long‑term account vision and ensure Assembly’s work is aligned to client ambition.
• Represent Assembly with authority, judgement and credibility at executive level.

Commercial Ownership

• Own revenue, forecasting, margin and long‑term account economics across the portfolio.
• Set and protect scopes, pricing models and commercial frameworks.
• Identify and convert organic growth opportunities that deepen strategic partnerships.
• Lead investment, effectiveness and value discussions with senior client stakeholders.

Strategic Direction & Integration

• Lead the strategic narrative linking client business goals to media, experience and performance outcomes.
• Ensure best‑in‑class integration across strategy, activation, data, technology and creative partners.
• Champion the use of Assembly’s proprietary tools, data and measurement frameworks.
• Elevate the sophistication, clarity and impact of client strategies and outputs.

Operational & Portfolio Leadership

• Design and scale effective operating models across accounts and markets.
• Ensure strong operating rhythms, governance and quality standards are in place.
• Anticipate risk, unblock complexity and resolve issues decisively.
• Balance strategic oversight with hands‑on involvement where required.

Team & Capability Leadership

• Lead, coach and develop senior Client Leadership talent.
• Build depth, succession and capability across account teams.
• Role‑model high standards, strong judgement and collaborative leadership.
• Act as a culture carrier for the Clients Leadership discipline and Assembly values.

Agency Contribution

• Contribute to agency growth, pitches and strategic initiatives as required.
• Share best practice, frameworks and learning across the Client Leadership community.
• Help shape standards for client experience, commercial discipline and integrated delivery.

Required Skills

• Extensive experience leading senior client partnerships within a media agency.
• Proven track record owning complex, multi‑account portfolios across different advertiser categories.
• Strong commercial leadership experience, including revenue growth, margin management and forecasting.
• Strategic depth with the ability to influence senior client decision‑making. Experience leading and developing senior, multi‑disciplinary teams.
• Excellent judgement, executive presence and communication skills.
• Comfortable operating in ambiguity and navigating complexity.
• Strong alignment with Assembly’s purpose, values and B Corp principles.

Equal Opportunities

Assembly is an advocate for equal opportunity in the workplace. We are committed to ensuring equal opportunities regardless of race, colour, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability and gender identity. We also consider qualified applicants regardless of criminal histories, consistent with legal requirements. If you have a disability or special need that requires accommodation, please let us know.

Seniority level: Director

Employment type: Full‑time

Job function: Business Development and Sales

Industries: Advertising Services

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