He has excellent technical skills.
技能を磨くために毎日練習している。
I practice every day to hone my skills.
He acquired programming skills through the training.
She practices every day to hone her skills.
In this job, you can make use of welding skills.
His skill level is rated very high.
技能 is a formal term for a practical skill or ability (often certified), while 技 usually refers to a concrete move or maneuver.
special skill; specialized skill
social skills
technical intern trainee; foreign trainee on a technical intern training visa