Why is there a 去 in 我们需要确保社交距离去保护您和我们的员工?
I also wondered people can use either '来' or '去' for 'to'  as in  用水来滅火 and 用水去滅火, and my impression is as follow:

来(to) emphasize the mean


[确保社交距离][来] 保护您和我们的员工 = To protect you and our employees with (the policy of) ensure social distancing

~

去(to) emphasize the objective


确保社交距离 [去] [保护您和我们的员工] = use (the policy of) ensure social distancing to protect you and our employees

Similarly:
用水滅火 = use water extinguishes a fire
用水来滅火 = extinguish a fire with water (stress 水 is the mean)
用水去滅火 = use water to extinguish a fire (stress 滅火 is the objective)
Edit:
Also, we use 来 when the object is close to you; we use 去 when the object is a distance from you
Example:
來我家 - come to my home
去你家 - go to your house
With this rule, we can apply it to your question
确保社交距离 [来]保护您和我们的员工 (保护您和我们的员工 is the goal right in front of you)
确保社交距离 [去] 保护您和我们的员工 (保护您和我们的员工 is a goal you set out to reach)
The two sentences basically mean the same, just from a different perspective