Can you please check if I did any grammar mistakes?
We hereby confirm that Jan Kowalski was employed in XYZ sp. z. o. o. from 20.08.2012 to 10.02.2017. He worked in the position of Samsung Premium Reseller’s Telephone Customer Service Specialist. During his work in our company Mr. Kowalski was responsible for:
• Samsung.pl online store customer service
• sales of Samsung products and third party accessories for individual and business customers,
• consulting on selection of complex solutions,
• technical support of Samsung customers,
• handling of service requests,
• participating in quality audits (individual average result 100%, while team average result is 82,21%).
Jan Kowalski completed the training programmes listed below:
• Samsung Sales Training and received the Samsung Product Professional Certificate.
• Samsung Customer Experience Management led by Mirosław Mazur
• Technical support training on Samsung products
• Several product training.
Jan Kowalski was conscientious, dedicated to his work and was very responsible. All these features guaranteed' excellent work. We found also that Mr. Kowalski’s creativity, organizational skills, and ability to work effectively in stressful situations helped to hold successfully his role.
Jan Kowalski was conscientious, very responsible and dedicated to his work. All these features guaranteed excellent work. We found that Mr. Kowalski’s creativity, organizational skills and ability to work effectively in stressful situations helped to fulfill his role successfully.
>>18092868
I forgot to mention I'm not a native speaker, so have someone else confirm what I wrote. And now that I think about it:
Jan Kowalski was conscientious, very responsible and dedicated to his tasks.
Because "work", when repeated so often, sounds only good in Rihanna's song.>>18092868
>>18091828
After the first paragraph, replace all the "Jan Kowalski"s with "Mr. Kowalski. It's not incorrect to repeat his name several times, but it does sound a bit clunky, and as you've told the reader his forename there's no need to use it over and over.
The first three paragraphs are fine. It's only the last part that gives away that it was written by a non native speaker. I'd change it to something like:
Mr Kowalski is conscientious, dedicated to his work and very responsible. These attributes guaranteed excellent work. We found that Mr. Kowalski’s creativity, organizational skills, and ability to work effectively in stressful situations helped him to excel in his position.
That puts the exact same message across, but it sounds a lot smoother and more natural. If it makes a difference, I speak British English as opposed to American English.