Strategies for Managing Difficult Colleagues from a Former T-Mobile Exec

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Mike Katz, T-Mobile's former chief business and product officer, told Business Insider that dealing with difficult coworkers is an unavoidable part of professional life. Katz built his career from a college student selling cellphone services at retail stores to the C-suite, holding over a dozen roles at T-Mobile before exiting in July to pursue new interests. He will remain in a strategic advisory role through December 2026. His core message: no matter your best efforts, some people will simply be difficult, and accepting that reality is the first step toward managing those relationships effectively.

For small-business operators, this advice carries particular weight. In a large corporation, you can often route around a difficult colleague by finding another ally or department. In a small business, you rarely have that luxury. Teams are lean, roles overlap, and one toxic or obstructive person can stall projects, poison morale, and consume an outsized share of your time. Katz's guidance to set concrete goals for each interaction — get the approval, secure the sign-off, resolve the blocker — is practical for owners who cannot afford to spend energy on relationship repair when the business needs forward motion.

What stands out is Katz's emphasis on realistic expectations. He does not promise that difficult colleagues will change or that every conflict can be resolved through better communication. Instead, he advises defining what success looks like before the conversation and accepting that you may not leave the meeting feeling warm and fuzzy. This is a refreshing departure from the soft-focus advice that dominates leadership content, which often implies that enough empathy and persistence will win anyone over. Katz's approach is closer to negotiation strategy: know your objective, pursue it, and do not confuse the outcome with the relationship.

Katz also recommends building a strong internal network with allies across the company, noting that those relationships open doors and create opportunities over time. For small-business owners, this translates outward: your network of vendors, peers, advisors, and industry contacts serves the same function. When a difficult employee, partner, or client creates friction, having trusted relationships elsewhere gives you options — alternative suppliers, referrals, or simply perspective from someone who has faced the same problem. The second-order effect of Katz's advice is that it shifts your energy from fixing people to building systems that reduce their leverage over you.

What to watch next: whether Katz, now free of the C-suite, expands these ideas into a book, consulting practice, or speaking circuit. Former executives with operational credibility often convert career lessons into advisory work, and his retail-to-C-suite path gives him a story that resonates beyond telecom. For operators, the actionable move this week is simple: identify the one person who consistently slows you down, define the single outcome you need from your next interaction with them, and enter that conversation with a clear goal rather than a hope.

“There's going to be people that you run into that, no matter all your best efforts, they're just going to be super difficult” — Business Insider

Takeaway: Set a concrete goal before every interaction with a difficult colleague and stop expecting the relationship to improve.