Senior Sales Manager

Onetag; Greater London; On-site; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Health insurance

30 days annual leave (+ bank holidays)

Pension

Friendly office space

Opportunities to visit HQ in Italy

Job summary

Onetag is seeking a Senior Sales Manager to join our London-based team. You will build and own a new business pipeline, targeting holding company media agencies and advertisers, and establish Onetag as the go-to partner for brand-new clients.

You will drive revenue and leverage case studies from Italy to accelerate adoption in the UK. You’ll work autonomously in a fast-paced environment, collaborating with the SVP Demand Sales and our Customer Success team to grow accounts and shape our offering

Qualifications

• Experience selling programmatic solutions to media agencies.
• Proven track record of winning new business and opening new accounts.
• Strong relationships across agency activation layers.
• History of meeting and exceeding revenue targets.
• Deep understanding of programmatic buying via PMPs and open auction.

Responsibilities

• Win new business across holding company media agencies and advertisers, building your own pipeline.
• Establish Onetag with brand-new agency and advertiser partners, on-site with clients.
• Deliver and aim to exceed revenue targets for your patch.
• Bring proven work and case studies from Italy to accelerate UK adoption.
• Collaborate with Customer Success to grow accounts post-launch and spot opportunities.
• Provide market feedback to shape product offerings per client needs.

Skills

Programmatic selling

Agency relationships

New business growth

Revenue targets

Deals & PMP knowledge

Autonomous working

Consultative selling

Job description

Onetag is a fast-paced ad tech business. Founded in 2012, it has become one of the fastest-growing exchanges globally, as reported by Jounce Media.

Since its inception, Onetag has focused on building best-in-class technology. Today, direct integrations with more than 2,000 premium publishers enable over 5,000 brands and agencies, including many of the world’s largest advertisers, to reduce waste and achieve better results.

The March 2026 acquisition of Aryel, a specialist in immersive and interactive advertising, marks Onetag’s next stage of growth: combining industry-leading exchange technology with creative intelligence to drive more performant media for brands.

Headquartered in Italy, Onetag is driving growth across the US, Europe and the rest of the world.

About the Senior Sales Manager, Demand Role:

We’re looking for a Senior Sales Manager to join our London-based sales team, working directly with the SVP Demand Sales. You’ll thrive in a fast-paced environment and bring a strong book of contacts across holding company media agencies, ready to leverage them to close new business and establish Onetag with brand-new agency and advertiser partners.

This is primarily a new business role, focused on building your own pipeline and turning conversations into revenue, ideally suited to someone motivated to exceed their targets.

The role will suit someone who is comfortable working with high levels of autonomy, enjoys being out and about in front of clients, and is keen to develop and grow as their patch and the business continue to grow.

You’ll also play a key role in our market feedback loop, bringing what you hear from agencies and advertisers back into the business so we continue to evolve our product offering and build and deliver what our clients ask for and need.

It’s a great opportunity for someone who wants the energy of a scale-up, backed by existing global scale, proven work from Italy to bring to the UK market, solid investment in marketing and more.

What You’ll Do:

• Win new business across holding company media agencies and their advertisers, building and owning your own pipeline from first meeting to signed deal
• Establish Onetag with brand-new agency and advertiser partners, spending time on site and becoming the go-to contact for your clients
• Deliver, and aim to exceed, revenue targets across your patch
• Bring proven work and case studies from Italy to the UK market to accelerate adoption
• Work with our Customer Success team to grow accounts once they’re live, using performance data to spot new opportunities
• Feed client and market insight back into the business, helping shape a product offering that delivers what clients ask for and need
• Partner with marketing on events and thought leadership to raise Onetag’s profile in the UK

Skills You’ll Have:

• Significant experience selling programmatic solutions into media agencies, with a proven track record of winning new business
• Strong relationships across agency activation layers, from account teams through to trading desks.
• A track record of opening new account teams within agencies and driving new adoption and brand spend
• A history of meeting and exceeding revenue targets
• Deep understanding of programmatic buying via deals (PMPs, open auction packages, curation)
• Experience turning campaigns into great examples of work that build advocacy in market and help expand the business
• Comfortable working autonomously in a fast-paced environment, with the drive to build a patch from the ground up
• A consultative, curious approach, with the ability to turn client feedback into clear insight for the business

What you will get:

• Health insurance
• 30 days of annual leave (plus bank holidays)
• Pension
• A friendly office space
• Opportunities to visit the company’s headquarters in Italy

Onetag is proud to be an equal opportunity workplace: we are committed to equal opportunity for all applicants and employees regardless of age, disability, sex, gender reassignment, sexual orientation, pregnancy and maternity, race, religion, or belief, and marriage and civil partnerships. If you have a disability or special need that requires accommodation during the application process, please let us know!

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