The daughter of former UUP MLA Billy Armstrong, mother-of-three Sandra hopes to change the perception of politicians as "old men in grey suits".
Why did you want to become an MLA?
I didn't always want to become an MLA, but I got so much encouragement when the vacancy arose in Mid Ulster, I just had to grab the opportunity with both hands.
Outside of work and family, what are your passions in life?
I really want to highlight the need for more foster carers. Also, having grown up on a dairy farm and now married to a pig farmer, I know the importance of supporting the agri-food industry.
What single issue would you hope to champion in the Assembly?
I am getting my teeth into internet safety in the Northern Ireland context and examining ways of ensuring young people are safe.
What if anything about the Stormont structures is in most urgent need of change?
Often good schemes are delayed because they need to be approved by three or four departments.