As an accomplished journalist with a wealth of TV experience, Kapalos will also report on significant stories for the program nationally.
Kapalos says she is thrilled to come to Seven and expand on her career in news and public affairs. "I am absolutely delighted to be joining the Seven Network and Today Tonight," she said.
"The role represents a wonderful opportunity to connect with the audience on a broader scale, and offer good, solid journalism which remains accessible to all.
"I look forward to actively contributing quality stories and interviews and working alongside an excellent reporting team to bring you a content-rich, compelling public affairs program."
Seven's Director of Public Affairs, Neil Mooney, said "Today Tonight is a proven winner in public affairs, telling the stories that matter to everyday Australians, and Helen's appointment as the host for Melbourne and Sydney – as well as reporting on the big issues nationwide – will only add to the strength of the program.
"Helen has proven herself over a significant period of time to be a first-class journalist and presenter. And there is a real affection for her in Melbourne, where she is based, and in Sydney, where she grew up and started her career. We look forward to her joining the team."
Born and raised in Newcastle, north of Sydney, Kapalos now resides in Melbourne. She has worked in broadcast TV and radio since 1994, covering major events such as the Waterfall train disaster, the Athens Olympics, the 2009 Black Saturday bushfires and the Christchurch earthquake.
She is also a director on the board of Federation Square in Melbourne, the Number One female ticketholder for the Hawthorn football club in the AFL and an ambassador for the Ovarian Research Foundation.
In 2012 Today Tonight was the leading 6.30pm public affairs program across the Five City Metro Market, with an average nightly audience of 1,054,000 viewers.
Helen Kapalos is on Instagram follow her @hkapalos
Helen Kapalos is on Facebook www.facebook.com/hkapalosHelen Kapalos is on Twitter at @hkapalos