Well not sure where you are going and what the environment is like for GM and MC at that school. There is not a ton of of aerospace stuff. In the US (outside of airlines) you are looking mainly at Boeing and then defense industry stuff (Sikorsky, Lockheed Martin, etc). Diversified has tons of options but they vary from really neat opportunities and great companies with lots of growth to kind of sucky locations and work assignments. Energy, if you want traditional (Oil/Gas, Utilities, and major servicing/construction like GE) there are tons of options. Some companies recruit at only a few schools while some will branch out to dozens. However, the positions they recruit for can vary drastically. I know some companies recruit for GM stuff on campus at a few schools but will do Corporate Fin, Ops, and Marketing at different combinations of schools. They also will hire different GM programs from different schools. You could get a GM position from a top 5 at the same company as someone from a top 30 but have completely different functions, expectations, salaries, and career paths.
At Kellogg there was more than enough pure GM stuff (as long as you have work authorization) to not even worry about needing to do MC as a backup. MC requires lots of prep work for interviews and networking. Your energy will be much better spent focusing on doing GM stuff, do a backup of operations, strategy, even marketing roles at the same company. I interviewed for multiple roles at the same companies...if you end up at in a marketing role for the summer for a company then that will help get GM at that company or their competitors. Lots of companies care as much about who you work for as what you did. Energy companies (oil/utilities) definitely look for that industry passion as much as anything.
When you show up in the fall get a list of all the companies that recruit for GM there and also find out how many people they hire and how many folks they make offers to. There are some companies that come here and make offers but few people accept, then there are companies who make one or two offers and everyone accepts. Sometimes the companies brand name means nothing, there are companies you probably never have heard of that have amazing GM career paths and huge companies with terrible GM career paths.
Kellogg Class of 2010...still active and willing to help. However, I do not do profile reviews, don't offer predictions on chances and am far to busy to review essays, so save the energy of writing me a PM seeking help for these. If I don't respond to a PM that is not one of the previously mentioned trash can destined messages, please don't take it personally I get so many messages I have a hard to responding to most. The more interesting, compelling, or humorous you message the more likely I am to respond.
Get the best GMAT Prep Resources with GMAT Club Premium Membership