Having a trusted group of advisors is strongly recommended. Confusing everyone in your office as your professional advisor is ill advised.
Find people that have had success in fields that interest you and cultivate relationships with them. And explicitly ask, "Would you be willing to be one of my professional advisors?" You'll want 3-5 of these.
From time-to-time, grab lunch or coffee. And ask the advantages of an MBA or whatever certification. Ask "does job X seem like a good next move for me given my career goals?" Then pick up the tab.
But never, ever confuse lunch at your company's cafeteria as the time or place to raise professional doubts. Absolute confidence at work; and raise your personal insecurities in private with people you can trust and that are expecting that kind of conversation.
Here's my current advisor group:
My mom and dad. I'm mid-30's with three kids of my own. My own parents are a great sounding board for "how is my work/life balance? Am I focused too much on cash at the expense of time with my kids? Will another relocation be too much to ask of my children?" They don't know much about what I do and can't help me build business models, but they raised 5 kids and can effectively call out my B.S.
The dean when I got an MBA. We did a lot of work together while I was at school. He's an incredibly connected individual and is someone I trust to guide me with business ethics. In a failed startup I had some private issues. I met the dean for coffee and he gave me some of the best advice I've ever received: "keep your chin up, your mouth shut, and your integrity intact." Basically "That sucks, move on." He's a "big picture" / "career arc" kind of guy who could help me get a conversation with just about anyone I want. And he's a wonderful person I consider a good friend.
A previous co-worker who is a marketing executive. We hit it off at work. I'm passionate about quantitative marketing. He was more brand oriented. Enough overlap where we had shared interests; different enough we weren't direct competitors at the office. He's been around and knows the pitfalls of business. Sample advice: "ignore all 'Growth hacker' job listings. They're brutal jobs and the first to get axed when numbers are missed. You'll be held accountable for the things you are least likely to be able to control."
None of these conversations happen casually. They are planned discussions with people I have a close relationship. And none of them work in my org (I asked my old coworker to be an advisor _after_ he left).
Be purposeful in what you say to whom.