About Smartest Energy
Who We Are
Founded in 2001, SmartestEnergy was established as an aggregator of independent generation projects and entered the UK supply market in 2008. Since then, we've grown into a truly international energy company, opening offices in the United States and Australia to advance our purpose: driving a smarter transition to a net-zero carbon future on a global scale.
SmartestEnergy is a wholly owned subsidiary of Marubeni, a Japanese corporation listed in the Fortune Global 500 (No. 173), providing us with the stability and resources of a major international player while maintaining our innovative, forward-thinking approach.
Our Approach
We're a next-generation energy company with a unique business model built on strong customer relationships and deep trading expertise in the gas and power markets. Our approach combines technical knowledge with commercial flexibility to deliver tailored solutions for our clients.
Our Market Position
As the UK's leading purchaser of independent generation, we manage over 3GW of capacity from UK projects and serve as a licensed energy supplier to 40,000 MPANs across our Industrial and Commercial and Business Divisions. This experience enables us to provide sophisticated commercial agreements for businesses across diverse sectors, from small enterprises to large industrial operations.
Our Benefits
We believe in empowering our team with flexible working arrangements that support work-life balance:
- Flexible working patterns: Open to 4-day week (80% hours), part-time, and compressed working schedules
- Work from anywhere: Remote working options available
- Health coverage: Comprehensive health and dental care
- Generous time off: 25 days annual leave plus public holidays for full-time roles
- Pension: 7% employer pension contribution
- And much more
Our commitment to flexible working reflects our understanding that great work happens when people have the freedom to balance their professional and personal lives effectively.

