проверьте, пожалуйста мой перевод

[olja_d]

Справка дана ХХХХХ в том, что он отработал фактически в ОАО СМУ "ХХХХХ" по договору подряда.

This is to certify that Osypenko Igor Myhaylovych has factual worked it Open Joint-stock Company, Construction and Assembling Management “ХХХХХХ” according to the Construction Contract.

[10-4]

Mikhailovich

actually worked for OAO SMU XXX as a contractor

OR was actually contracted by OAO SMU XXX

[olja_d]

Спасибо Вам!!!

[Althea]

Не надо "actually". Если хотите усиления, можно сказать has indeed worked, но в тексте справки достаточно (и правильно) будет написать:

This is to certify that Mr. X has been employed by the Company as a contractor under Contract No... dd.DD/MM/YY) from DD/MM/YY to DD/MM/YY