CERTIFICATE OF APPRECIATION [closed]

This certificate is presented to XYZ (employee name)in recognition of his contributions to bringing strategic changes in ABC's (company name) procurement process and e-Tendering

Is this grammatically correct? should i use preposition "to" again after AND (....e-Tendering)? there are two achievement, one is bringing strategic changes and another one is contribution in e-Tendering.

Thanks

You may indeed find it more readable with a preposition:

This certificate is presented to in recognition of his contributions to e-Tendering, and to strategic changes in 's procurement process.