Private equity firms IMB Partners and Gemspring Capital completed the investment in Carr & Duff, a southeastern Pennsylvania based corporation providing specialty electrical construction services. Financial terms were not disclosed. "Gemspring is excited to support the next phases of growth at Carr & Duff. We look forward to working in a true partnership with the IMB team and the Duff family to continue to build on the Company's great heritage of safety, quality and customer service," Brad Liff, Gemspring Managing Director.