Question

That means that I needed to go from working one-on-one with

Answer 1

That means that I needed to go from working one-on-one with each team member to having to delegate responsibility as the project grew.结构：

that means that +I needed to go (from.to.)

to having 是与前面from衔接的

即：那就意味着我需要在项目成长进行过程中完成从与组员一对一的工作到不得不担负责任（的转变）