RF Investment Partners has invested in RJ Underground, Inc., a Kenosha, Wisconsin-based provider of horizontal directional drilling, hydro excavation, and specialty utility installation services. Founded in 1996 by Rich Johnston, RJU serves municipal, utility, commercial, and residential customers across the Midwest.

Patrick Riggio, managing director at RF Investment Partners, noted that RJ Underground represents the type of business they seek—strong founder-led companies with deep technical expertise in mission-critical infrastructure. He emphasized that Rich Johnston and his team have built a trusted, industry-leading reputation in the utility infrastructure space.

The investment will support RJ Underground’s expansion into new markets and facilitate both organic growth and acquisitions. TKO Miller served as the exclusive financial advisor to RJ Underground during the transaction.