There had been a review of the motto and values at the college - which had a roll in December of 277 pupils - a new uniform was introduced, buildings were refurbished, a new faculty structure was launched and the timetable was revised and successfully trialled, the report said.
"Positive ongoing changes are evident."
Mr Hullena, in the latest school newsletter, said the glowing report was momentous and he thanked "everyone who has played a part in this turn around".
"In my view these shifts would not have been possible without the strong relationships and partnerships that have been developed within and beyond the school," he said.
"I think it is an outstanding report and certainly one I'm very proud of. It acknowledges a number of great practices at the college, the positive nature of its students and the clear shifts the college has made since 2008."
The report found teachers at the school are highly committed to student success and a range of opportunities existed for students to develop and demonstrate leadership.
Career opportunities also were made available through a variety of academies and tertiary providers that included the building of a house on a Year 14 course and Maori performing arts.
"The school tone is positive, with a strong sense of belonging and purpose evident amongst the students.
"They help each other with their learning. Students are beginning to take responsibility for managing their own learning and behaviour."
A range of initiatives had successfully enhanced teaching and NCEA participation data showed that since 2010, the percentages of students obtaining qualifications for Level 1, 2 and 3, had significantly exceeded those of comparable schools.