Technologically both are correct. But 能源保障供应 puts a bit emphasis on the action 保障, which denotes the determination from the government.

Technologically both are correct. But 能源保障供应 puts a bit emphasis on the action 保障, which is the main content of 工作.

Another example 洪水治理工作(instead of 治理洪水工作), the emphasis is put on 治理. That means the work is to find ways to 治理洪水.