How do you form a first impression of your employee?

1- Be committed.

2- Be professional on your, Clothes, How you talk, How you treat and knowing how to show up your experience.

3- Be yourself.

4- Eye contact.

5- TRUST.

work on exceeding his expectation , and always leave your mark at any task you handle .

It is a good question, I would really suggest you the following:
1- BE ON TIME, don't come late.
2-You should be yourself (relax), because if you were uncomfortable this would create a wrong impression.

3- Physical appearance matters, especially at the first time...
4-Keep a smile on your face..
i think you need to read more about this matter, but in my opinion, these are the main points.
Good Luck

By looking his/her confident in his/her demo presentation or facing in front of the interviewer or boss.

Glance of an employee at first: 1.
Punctuality.
2.
Interview Requirements: 3.
Neat and Professional Dressing.
4.
Enthusiasm about the company.
5.
Be confident, Patient, Keep an eye contact with a little smile and a trust worthy candidate.

Actually the guardian lasting impressions Valmmtalob is appropriate given the opportunity to be able to identify the pros