Strategic Enterprise CSM — AI-Driven Growth Partner

Proton.ai; Cambridge; Hybrid; GBP 67,000 - 105,000; Full time

Benefits offered by this job

Stock options

Flexible schedule

Unlimited PTO

Wellness days

Parental leave

Health benefits

401k match

Company off-sites

Job summary

Proton.ai is seeking an Enterprise Customer Success Manager to own a ~$2.5M ARR book of enterprise and mid-market customers. You’ll advise executives, craft AI strategies, and partner with Sales, Product, and Engineering to drive adoption and renewals.

This hybrid role is based in the greater Boston area with 10+ customer visits per year. You’ll build trust at all levels, identify expansion opportunities, and translate insights into actions that fuel customer growth and long-term partnerships.

Qualifications

• 3–4+ years in Customer Success or a similar customer-facing role in B2B SaaS.
• Early-stage CS experience is a plus.
• Able to adapt quickly and move the needle for customers.
• Comfortable speaking with executives and building strategic relationships.

Responsibilities

• Own a ~$2.5M ARR book of enterprise and mid-market customers.
• Lead business conversations about revenue, productivity, and goals.
• Collaborate with Product, Engineering, and Sales to drive adoption and renewals.
• Identify opportunities to expand and partner with Sales to close them.
• Turn insights and usage data into actionable recommendations for executives.
• Represent customer needs to Product and CS teams to improve solutions.

Skills

Customer success

B2B SaaS

Executive communication

Problem solving

Tools

CRM tools

Data analytics tools

AI agents

Job description

Proton.ai is seeking an Enterprise Customer Success Manager to own a ~$2.5M ARR book of enterprise and mid-market customers. You’ll advise executives, craft AI strategies, and partner with Sales, Product, and Engineering to drive adoption and renewals.

This hybrid role is based in the greater Boston area with 10+ customer visits per year. You’ll build trust at all levels, identify expansion opportunities, and translate insights into actions that fuel customer growth and long-term partnerships.