Sales Development Representative (US)

At Castor, we’re modernizing the backbone of clinical research

Clinical trials are the gatekeepers of human health, yet the industry is still bogged down by fragmented, manual processes that can waste time and exclude patient populations. At Castor, we are building the operating system for the next era of clinical research.

We provide a modular cloud platform designed to run trials end-to-end. Our foundation is a robust Electronic Data Capture (EDC) system, supported by eConsent for recruitment and screening and eCOA to accurately capture patient reported outcomes. We don’t just stop at data collection; we use Castor Catalyst (our high-precision AI automation) to strip away the manual effort that historically makes research slow and expensive.

How we work: Trust over tracking

We are a remote-first company built on the belief that talented people do their best work when they have the agency to manage their own lives. We believe that high performance requires a foundation of trust, health, and cutting-edge support.

• Work-life integration: We don't believe in performative presence. We trust you to own your schedule and show up for your team, while also making space for your life outside of work.
• Deep work & async: We protect your time. We prioritize thoughtful, asynchronous communication so you can focus on solving hard problems without a calendar full of status update meetings.
• Radical candor: We value the truth over hierarchy. We give and receive direct feedback because that’s how we grow—as individuals and as a company.

Your mission and impact

As our Sales Development Representative (SDR), your mission is to bridge the gap between Marketing and Sales by turning inbound interest into high-quality pipeline. You will be a Pipeline Architect, using AI and automation to enrich lead data, streamline outreach, and maintain a frictionless funnel. You’ll execute targeted campaigns to convert inbound MQLs into SQLs, maintain rigorous lead hygiene, and ensure fast follow-up on inbound and event-driven leads. By optimizing this journey and automating the mundane, you will free up your time to provide strategic feedback on ICP alignment, identify market patterns, and conduct deep-dive research to uncover net-new accounts.

Who are you

• You look for ways to use AI, data enrichment, and automation to work smarter, not just harder
• You don't just pass leads; you provide structured feedback to Marketing and Sales on lead quality and segmentation
• You are proactive, detail-oriented, and motivated to master the commercial side of Life Sciences SaaS
• You take pride in lead hygiene and ensuring that no opportunity falls through the cracks in Salesforce
• You can summarize complex clinical concepts into concise, persuasive messaging
• You are a self-starter who masters the art of remote collaboration. You value deep work and asynchronous communication to drive results
• Giving and receiving feedback are necessary to win as a team. You give and receive direct, data-driven feedback, even when it’s uncomfortable
• You are motivated to grow into a more senior commercial or revenue operations role over time
  

What you’ll bring

• Around 3-5 years of experience in Sales Development, Demand Generation, or Growth roles in SaaS, Life Sciences, or similar B2B environments
• A strong understanding of lead qualification, funnel management, and CRM best practices (Salesforce preferred)
• Proven ability to convert marketing leads into qualified sales opportunities through disciplined follow-up and research
• Excellent written and verbal communication skills, with an ability to summarize complex ideas clearly and concisely
• Curiosity and comfort using AI tools, data enrichment, and automation to work more efficiently. Confidence using AI tools to write messages, enrich data, automate workflows and experiment with outreach strategies

It would be great if you also had:

• Experience working in MedTech, Biotech, or CRO sectors
• Familiarity with sales engagement platforms (e.g., Outreach, Apollo, or ZoomInfo)
• Exposure to AI-driven prospecting or campaign automation workflows
• Understanding of clinical research terminology and stakeholder roles

How we invest in you

High performance isn't sustainable without real support. We provide the infrastructure you need to stay healthy, focused, and rewarded.

• Rest is non-negotiable: Unlimited annual leave with 25-day minimum. We don’t just allow time off; we expect you to take it.
• Downtime weeks: Once a quarter, the whole company shifts gears. No new shipping—just a week for deep focus, learning, or catching up so we can start the next quarter fresh.
• AI-first culture: We provide the tools and training to ensure you’re spending your energy on high-value work, not manual repetition.
• Real ownership: All Castor team members are offered options through our Employee Stock Option Plan (ESOP).
• Comprehensive wellbeing: Free access to Open Up for mental health, specialized sleep courses (for you and your family), and a budget to make your home office a place you actually want to be.
• Annual bonus: A guaranteed "Happy Holidays" bonus every December.

Belonging at Castor

We build products to make research accessible to everyone, and we believe our team should reflect that same diversity.

Our remote setup is designed to support you as a whole person—your family, your mental health, and your authentic self.

We don't care about your background as much as we care about your perspective and your expertise. We strongly encourage applications from women, people of color, and the LGBTQ+ community. Please feel free to share the pronouns you use (for example she/her/hers, he/her/his, they/them/theirs, etc.).