The USACE Chicago District is conducting sources-sought market research, not issuing an RFP, to identify qualified small-business and other-than-small firms capable of upgrading Commercial Gear Backup Power and associated control systems at the electronic fish barrier in Romeoville, Illinois. The effort involves replacing generator controllers, modernizing breaker controls/communications, rebuilding control software and operator interfaces, and performing testing, operator training, and phased changeover at an active, mission-critical 24/7 facility. Required expertise includes generator synchronization/load management, switchgear automation, protective relaying, PLCs/HMIs/industrial communications, and integration with existing Rockwell ControlLogix, FactoryTalk View SE, SEL relays/RTAC, Basler, and DEIF equipment, plus MSI/IACS and EGSA-certified or equivalent personnel. Interested firms should review Attachment 1 in PIEE and submit a capability statement of up to 10 pages covering business size/socioeconomic status, technical and integration experience, certifications, phased cutover/FAT capability, commercial solutions, and estimated lead time. The requirement may be set aside for small businesses or procured through full-and-open competition, with multiple awards possible; NAICS 238210 has a $19.0M size standard.