"可靠的工作业绩" can be translated into English as "reliable work performance" or "consistent and dependable work achievements".
"Reliable work performance" emphasizes the trustworthiness and consistency of one's work output.
"Consistent and dependable work achievements" highlights both the steady nature of the achievements and the reliability of the person in delivering them.
Both expressions are suitable, depending on the context and the desired level of detail. In most cases, "reliable work performance" would be a concise and appropriate choice.