Slim is a guy who got two weeks training before shipping out. He was a soldier, he fought in several skirmishes. Many of which he couldn't describe to you because he was just a grunt. He often didn't know the objective or the strategy, he just followed orders.
Val was a Lieutenant Commander in Sol Guard's Navy, she did three years in the Navy's Counter-Insurgent program before being poached by CIG9 and undergoing another 22 weeks of training in the School. She's experienced with hostage-taking, kidnapping, terrorism and extortion. She knows how to secure locations, neutralize targets, track down fugitives and conduct sniper operations.
She started in CIG9's Operations division, Airbone. She was expected to deploy from orbit, land, survey a location, neutralize threats and extract high-value targets safely leaving no evidence of her presence in the field. That was before she transferred to Intelligence.
If Val thought Slim was a real threat, he'd just disappear one day and there'd be solid evidence Val was nowhere near the place.