I am a utility contractor. We completed our preliminary work on the project. Then the grading contractor came in to do his work. We then came in to finalize our phase of the project. Upon arrival we discovered numerous damages done by the grading contractor and I made him and the engineer aware of the damages and made necessary repairs, and calculated and shared the repair total. The grading contractor made a partial payment to me but has not paid the outstanding balance. I have made several attempts to contact him with no success. I have been told I cannot lien the job and instead I have to file a lawsuit against him. What is the best way for me to get paid? What should I do first?