''She rang straight away,'' her mother, Jan, said.
''She said 'Oh my gosh, I've just met the most powerful man in the world'.''
Ms Pfeifer (37), who attended James Hargest College, worked in this country as a researcher and leadership strategist before heading to the US about five years ago.
She has worked extensively with non-profit organisations, foundations and corporates in New Zealand and across the United States and was developing her own company in a business incubator when Mr Obama visited earlier this month.
Mrs Pfeifer said Mr Obama toured the incubator before going back to talk to Dale about her company, Good World, which helps connect donors and charities online through social media sites.
Mrs Pfeifer said Dale mentioned New Zealand as soon as she met Mr Obama.
''She said 'Hi, I'm Dale from New Zealand', and he said New Zealand was a very beautiful country. She replied she had been fortunate enough to live in two beautiful countries, New Zealand and the United States.''
Dale told her parents she had been ''super calm'' while pitching her business to the President and he had ''totally got'' the concept, Mrs Pfeifer said.
Knowing their daughter had met the President was exciting, she said.
''It's pretty good for a girl from little old Invercargill. We're very proud of her - overwhelmed in some ways. It's pretty cool.''
