With an illustrious career spanning various facets of air traffic control, including aerodrome, approach, and area control, Helena has demonstrated unwavering dedication and expertise. Her journey commenced in Visby Tower on the Baltic Sea’s Gotland island, eventually leading to pivotal roles at Östgöta Kontrollcentral and finally a watch supervisor position at Stockholm Air Traffic Control Centre.
Sjöström’s commitment extends beyond her operational duties, evidenced by her influential tenure as President of the Swedish Air Traffic Controllers’ Association (SATCA) from 2006 to 2017.

Helena´s involvement in IFATCA has included work on the federation´s magazine, the Controller and two years (2018-2019) as Chair of IFATCA´s Committee A during the annual conference. During the conference 2019 in Costa Rica, Helena was elected  Deputy President of IFATCA. In 2024, she was elected as the Federation’s first female President and CEO.