My CV. Help me please!!

Is my CV well written?

I have worked with various football teams.

You work 'in' a professional field or department, 'with' a particular type of person or department, 'at' or 'for' a particular company. This is kind of difficult to explain, for example: 'I have worked in marketing for various football teams.' 'I have worked for the Santos team for 3 years.' 'I worked with children at the Madrid School.' 'I worked with athletes during my time as a scout for the college football team, in the foreign recruiting department.'

I am an easy going person that works well with everyone.

I am friendly, reliable and energetic.

I have arranged voluntary activities about theater and sports.

I have volunteered in theater and sports.

Or, 'I have arranged volunteer activities in theater and sports' if you create the activities for yourself and others to participate in.

Or, 'I have volunteered for (specific theater)'

Highly experienced in water processing, chemistry lab, administration and management.

Competent in C/C++, MS Office, Arc Gys, Autocad, Internet and scientfic applications (Mathcad, Derive, MathLab)

Won a writing contest "Concurs escriptors valencians" in 2005.

What is the name of the writing contest?

In CVs, you generally remove the 'I' and just put the verb. 'Managed the team'

I have participated in some short films.

Acting or what?

I like to cook and sports.

You can put in a section for 'Hobbies' or 'Personal Interests' and put in specifics like 'cooking, football'

I have experience in tutorials.

Tutoring? The act of being a tutor is tutoring. Tutorials are lessons.