Senior Sales Development Representative

Refractal is an AI security company building the infrastructure organisations need to defend against autonomous AI threats. 2026 has shown that generally capable intelligence is here. The challenge now is modernising security to stop AI-enabled threats, whether they come from internal agents going rogue or from attackers using AI to become more dangerous.

Refractal was founded on cybersecurity and AI expertise from MIT, Microsoft, NASA and the U.S. Navy. Our product lets organisations detect AI-enabled threats at low cost without sacrificing detection quality. We take a practical approach to AI risk, combining proven cybersecurity methods with frontier AI security research.

Today, we work with governments and organisations that can't afford to get security wrong. We're backed by leading deep-tech and cybersecurity investors and are growing the team to deliver on this mission.

You'll generate Refractal's US pipeline by opening conversations with security and risk leaders at US enterprises and managed security service providers. You'll run and improve our outbound process, with a clear path into a closing role.

• Research target accounts and partners, and map their buying committees.

• Run multi-channel outbound across calls, email, LinkedIn and events.

• Qualify inbound demo requests and book meetings for our Account Executives and founders.

• Write and test messaging for CISOs, security leaders and compliance executives.

• Improve our outbound playbook and tooling, including sequences, AI-assisted research and CRM hygiene.

• A consistent flow of qualified meetings that turn into pipeline.

• Messaging and sequences that are tested, documented and improving.

• A documented, repeatable outbound process the sales team can rely on.

• 3+ years as an SDR or BDR in B2B software, including 1+ in cybersecurity.

• A consistent record of beating meeting or pipeline targets.

• Confidence cold-calling senior security buyers.

• Quick to learn technical topics, and able to explain AI security risk in plain language.

• Organised CRM habits in HubSpot or Salesforce.

• Enterprise or MSSP prospecting experience.

• Hands-on experience with AI prospecting tools such as Clay or Apollo.

Radical transparency. We believe the best work happens when everyone feels able to give and receive honest, constructive feedback.

Public service. We see AI security as a form of public service. Getting the AI transition right means putting the right infrastructure in place to manage the threats that come with it, and our work helps protect the institutions and services society depends on.

Fail fast. We test ideas early, seek feedback and learn quickly. We experiment rapidly and change course when something isn't working, without compromising on security.

Pragmatism, not dogmatism. We choose approaches based on how well they solve the problem. That means combining established cybersecurity methods with frontier AI research, questioning our assumptions, and changing our minds when the evidence changes.

• Salary: $70,000–$100,000 base

• On-target earnings of $100,000–$145,000

• Competitive equity to share in Refractal's growth

• Pension contribution

• Private medical and dental cover

• Visa and relocation support