As a Customer Success Manager, you will own relationships across a portfolio of mid-market Proton customers and serve as a trusted advisor to both day-to-day users and key decision-makers. This role is ideal for someone who is organized, confident, and excited to grow, balancing tactical execution with strategic conversations that help customers get the most out of Proton as their CRM. You’ll help customers understand the value of Proton, communicate best practices clearly, and support adoption across sales teams. While you will engage executives when appropriate, much of your work will focus on building strong operational relationships, creating structure, and ensuring that customers feel supported, aligned, and excited about their progress with Proton. This role is not a handoff or reactive support role—you’ll take ownership of your accounts from onboarding and training through renewal, ensuring customers stay engaged, drive adoption, and recognize the impact Proton has on their business. You’ll collaborate closely with internal teams, escalate thoughtfully when needed, and bring a proactive, problem-solving mindset to help customers move through challenges with clarity and confidence. We’re hiring someone in the Greater Boston area open to a hybrid schedule (3 days in-office/week). Travel expected: ~10+ times/year to visit customers.