Ironically, before he moved on to saving toheroa, he commercially harvested them for a local canning factory. That factory's closure alerted Mr Searle to how degraded the once plentiful resource had become.
Mr Searle and his wife Robyn were honoured at the Kaipara District's 2009 Citizens' Awards. A Pakeha, Mr Searle has also been honoured by Te Uri o Hau hapu for his kaitiaki/guardianship of Ripiro Beach.
He described Thursday's very personal ceremony as "humbling".
Earlier in the day Sir Jerry had been at the Ngunguru home of pioneer scuba diver, marine conservationist, film-maker, photographer, author and educationalist Mr Doak and his wife Jan to present Mr Doak with the QSM he was awarded in 2012.
"This small and discreet ceremony in no way diminishes the importance of this investiture," Sir Jerry said.
"It is appropriate that your contribution to New Zealand, its people and therefore the Crown is recognised. This is a reflection on the work of Jan, too. It's my privilege to be here to preside at this very important occasion."
The citation said Mr Doak was one of the first New Zealanders to advocate for the protection of the marine environment in the 1960s and is widely recognised nationally and internationally for his work.
He worked tirelessly to have the Poor Knights Islands established as a marine reserve, and was an advisor on the establishment of the first eco-dive tourism operation on the Tutukaka Coast.
He also has an ability to engage in effective dialogue with both allies and opponents.
Mr Doak's underwater photography is renowned around the world.