A técnica ainda não chegou, então vou ligar para ela.

The technician has not arrived yet, so I will call her.

Breakdown of A técnica ainda não chegou, então vou ligar para ela.

• ir: to go (future auxiliary)
• chegar: to arrive
• então: so
• ligar para: to call

Questions & Answers about A técnica ainda não chegou, então vou ligar para ela.

Does a técnica mean “the technique” or “the (female) technician” here?

In this sentence, a técnica most naturally means the (female) technician. Portuguese uses técnico / técnica as a person’s job title (male/female).
If you wanted “the technique,” you’d usually still say a técnica, but the rest of the sentence (vou ligar para ela = “I’m going to call her”) strongly points to a person, not a method.

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Why is it a técnica and not o técnico?

Because the speaker is referring to a woman, so the noun and article are feminine: a técnica.
If it were a man: O técnico ainda não chegou, então vou ligar para ele.

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What does ainda não mean, and why is it in that order?

ainda não means “still not / hasn’t … yet”. The common pattern is:

• ainda não + verb → ainda não chegou = “still hasn’t arrived / hasn’t arrived yet”

You can sometimes see não … ainda too, but ainda não is extremely common in Brazilian Portuguese.

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Why is chegou in the past tense if it means “hasn’t arrived yet”?