Harmonic Security lets teams adopt AI tools safely by protecting sensitive data in real time with minimal effort. It gives enterprises full control and stops leaks so that their teams can innovate confidently.
We are led by cybersecurity experts and backed by top investors including N47, Ten Eleven Ventures, and In-Q-Tel.
How We Work: AI-First by Design
Harmonic exists to help enterprises adopt AI safely and at scale. We hold ourselves to the same standard. Everyone at Harmonic actively uses AI tools to do their best work, from research and writing to building processes and automating workflows. We expect every new hire to bring curiosity about AI and a willingness to use it to work smarter, faster, and more creatively. For some roles, that means tinkering and staying open to new tools. For others, it means building entirely new systems with AI at the core. We'll be clear about what we expect for each role, and we'll give you the tools and support to get there.
About the Team
Our Sales team is in the early stages of building something extraordinary. We're a tight-knit, ambitious group laying the groundwork for how Harmonic goes to market. Every rep plays a critical role in building pipeline, landing new logos, and shaping how Harmonic goes to market. We're builders as much as sellers - refining the playbook, collaborating across teams, and creating repeatable success.
About the Role
We're looking for a Sales Representative to drive growth across the UK. You'll own the full sales cycle: identifying prospects, building relationships, running demos, negotiating deals, and closing new business. This is an opportunity to join a category-defining company at the ground floor - building your territory while influencing how we sell as a team.
What You'll Do
- Own the full sales cycle: prospect, qualify, demo, negotiate, and close
- Build and manage pipeline across assigned territory
- Develop account strategies in partnership with leadership
- Drive outbound prospecting and convert inbound leads
- Deliver compelling, tailored presentations and product demos
- Collaborate with Marketing, Product, and Customer Success for alignment and feedback
- Represent Harmonic at customer meetings and industry events
- Contribute to shaping our sales playbook and scaling best practices
What Success Looks Like
- New customers in your territory are signing and expanding with Harmonic
- Pipeline is healthy, with a balanced mix of outbound and inbound opportunities
- Deals are moving efficiently through the funnel with strong win rates
- You're a trusted partner, surfacing market insights and helping refine our approach
- Sales processes and tools are more repeatable and effective because of your input
What you Bring
- 4-8+ years of quota-carrying B2B SaaS cybersecurity sales experience
- Track record of hitting or exceeding quota in a closing role
- Comfort with outbound prospecting and building a territory from scratch
- Strong communication, storytelling, and relationship-building skills
- Ability to manage complex sales cycles with technical and business stakeholders
- Organized, resourceful, and thrives in a startup/Series A environment
You Might Be a Fit if You
- Love the challenge of opening new markets and winning early customers.
- Thrive in fast-moving, ambiguous environments where you help create structure.
- Enjoy collaborating with Marketing and Product to refine messaging and positioning.
- See sales as both art and science, and you're excited to shape the modern playbook for what high-velocity sales looks like in the age of AI.
- Believe AI and security will define the next decade of enterprise software.
- Are open to new tools and ways of working; you don't need to be an AI power user, but you're willing to adopt AI-assisted workflows for research, prep, follow-ups, and pipeline management.
- Are curious about how AI is changing enterprise buying and can lead a credible conversation about that shift with customers, rather than just pitching a product.
- Constantly look for ways to make your work more effective and efficient by automating the repetitive and rethinking the defaults.
- Choose to spend your energy on the work that moves deals, rather than the manual work that fills spreadsheets.
Why Join Us
This isn't just a job; it's an opportunity to be part of a team that is redefining cybersecurity. We believe today's talent is tomorrow's success, and we're committed to creating an environment where you can do the best work of your life.
- Competitive pay and meaningful equity with a direct stake in Harmonic's success
- Comprehensive benefits including health, dental, vision and pension matching
- A small, passionate team that values transparency, creativity, and learning
- Thoughtful leadership that cares deeply about growth, impact, and people
- Annual global offsites (past trips include Lisbon and Nashville)
- The chance to directly shape both our product and our culture as we build a category-defining company
Harmonic's Core Values Flourish in the Unknown
We embrace new, unfamiliar situations that require initiative and rapid decision-making. We orient ourselves quickly and deliver results with minimal guidance.
Never Full
We raise our hands, take on challenges, and assist others whenever possible. We hunger for opportunities to learn and do more.
Perfect Harmony
We support one another to create cohesion and unity. We collaborate openly, share feedback honestly, and help everyone produce their best work.