I agree with David. Here are some synonyms: ''on the ball'' - It means to be aware of any changes and quick to react to them: e.g. We need someone who’s really on the ball to answer questions from the press. ''on the lookout'' - Be vigilant, alert, watchful for someone or something: e.g. Be on the lookout for the twins-they're somewhere on this playground. ''be quick/fast on the draw'' - To be able to understand, anticipate, or react to a given situation or circumstance very quickly. e.g. You have to be fast on the draw if you want to get ahead in the world of business. ''on the qui vive'' - On the alert; watchful: e.g. Special guards were on the qui vive for trespassers. ''wide awake'' - Fully awake; completely aware, very alert: e.g. You need to be wide awake to the danger of leaving your belongings unattended. She was wide awake to all the possibilities. Hope this would be useful :)

To be 'on your toes' means that you are very alert all the time and ready for any eventuality. You can say that 'due to his job he is always on his toes.' The phrase 'on your guard' also means that you are always alert and ready in case there is any danger. ' He is always on his guard at work.'

Jerry, I am trying to describe working for a high-fashion brand, industry, helping a design team to put up a runway show and a collection.

What job are you trying to describe?