Our Purpose.
We are two project management firms united by one standard: outcomes. Cerro Grey drives with energy, precision, and a systems mindset, solving hard problems in real-world conditions. EPM brings rigour, structure, and stakeholder control, navigating complex programmes with discipline. Together, we lead with pace, clarity, and authority, built for projects that matter.
High-Impact Project Delivery
We lead complex, high-stakes projects across healthcare, infrastructure, and sustainability.
Transforming Futures
We work with NHS Trusts, universities, and life sciences institutions to transform critical estates, building safer, more resilient, and future-ready systems.
Strategy, Precision, and Delivery
We operate in live hospitals, and other high-risk environments, where strategy, precision, and delivery under pressure are non-negotiable.
Our Values.
Five Core Values that we live by:
Clear
Transparent insight and communication.
Creative
Problem-solving through inventive approaches.
Precise
Attention to detail and accuracy in execution.
Partner
Deep, long-term, purposeful relationships with clients and teams.
Principled
Ethical, moral, and value-driven behaviours that guide every decision.
Our Name H4P.
The Longitude Problem
In the 1700s, global seafaring was expanding — but navigation at sea was dangerous. While sailors could measure latitude (north-south) fairly well using the sun or stars, longitude (east-west) was elusive. Without it, ships got lost. Thousands of lives and fortunes were lost to poor navigation.
The British government issued a challenge: solve the longitude problem, and win the equivalent of £3 million today.
Astronomers tried to do it with complex celestial tables. They failed.
But one man — John Harrison, a self-educated carpenter and clockmaker — believed it could be solved with clarity, precision, and principled thinking.
Instead of charts, he built something simple: a clock that could keep time on a rocking, damp ship — something no one thought was possible. He worked for over 30 years, obsessively refining every part to reduce friction, heat, and error.
His timepiece — H4 — changed the world.
With it, sailors could finally know where they were. Trade exploded. Lives were saved. Empires shifted.
And Harrison didn’t do it for the money. He did it because he believed the solution should be elegant, principled, and true.
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