Vance Street Capital, a middle-market private equity firm, completed the acquisition of Syscom Instruments, a provider of vibration and seismic monitoring equipment. Financial terms were not disclosed. "Syscom's sensors, recorders and software solutions for the civil engineering, strong motion and safety systems markets are a great fit with Terra Insights' existing capabilities and further enhances Terra Insights' monitoring offering for its global client base," Steve Sandbo, Vance Street Principal.