Senior Customer Success Manager, International

Tremendous

1d•$160,000 - $240,000•Remote

About The Position

Tremendous is hiring a Senior Customer Success Manager to onboard, retain, and grow high-value international clients. The role serves as the primary customer success manager for clients in EMEA and India, plus selected accounts in other Asian markets where working hours align. The position owns customer relationships from late-stage sales through implementation and ongoing growth. The role is part of the Customer Success team, with day-to-day support from a manager and the broader Success team. It also works closely with the International team and joins relevant meetings, with support for questions and escalations outside US working hours. The position is fully remote and can be based anywhere in Spain, the UK, or the Eastern Time US region.

Requirements

At least 4 years of experience in Customer Success, Account Management, or a related role.
Experience managing enterprise or high-value B2B customers.
A record of leading complex onboarding and implementation work.
Strong commercial judgment and communication skills.
Excellent English.
Residence on the US East Coast, in the UK, or in Spain.
If based in the US, a sustainable commitment to working 6am–2pm ET.
If based in the UK or Spain, availability for normal or later local business hours with regular US team overlap; the exact schedule will be agreed during hiring.
Ability to manage complex client relationships independently in a remote environment.

Nice To Haves

Fluency in German, French, or Spanish.
Experience with SaaS, fintech, APIs, or payments.

Responsibilities

Lead onboarding and launch planning for high-value clients.
Own a portfolio of enterprise and mid-market relationships.
Run recurring meetings and monitor account health.
Retain business and identify expansion opportunities.
Coordinate complex needs across Sales, Solutions Engineering, Product, Support, and Operations.
Run proactive calls during agreed working hours for clients in EMEA, India, and other assigned markets.
Improve and document international Customer Success processes.