# Greengrass Consulting

Greengrass Consulting is a London-based change management firm specialising in the human side of organisational transformation. Led by Marina Lumley, the consultancy works with leaders, teams and individuals to facilitate behaviour change, develop emotional intelligence and unlock personal growth that drives business performance.

Rather than imposing change on people, Greengrass helps people change themselves. The firm combines rigorous, data-driven diagnostics with guided learning to surface underlying issues and equip teams with practical tools for sustainable improvement. Their approach centres on fostering personal awareness, emotional intelligence and the courage to embrace new possibilities.

Greengrass serves mid-to-large organisations across sectors including automotive, telecommunications and publishing. They work with general managers, heads of department and C-suite executives seeking to strengthen team performance, improve leadership effectiveness and build high-performing cultures that reflect authentic organisational values.

What distinguishes Greengrass is their commitment to sensitivity and rigour in equal measure. Rather than offering superficial solutions, they listen carefully to organisational challenges, manage potentially difficult conversations with thoughtfulness, and provide honest feedback without dilution. Their multi-year client relationships demonstrate trust earned through delivering genuine insights and measurable business impact. Their diagnostic methodology enables clients to track progress over time, embedding sustainable change rather than temporary fixes.