Ring & DuChateau has named Holly Blomquist, Jason LaRosh and T.J. Smith to its group of associates. Holly Blomquist was hired as a lighting designer in 2014 and was promoted last year to project manager and lighting group manager to lead R&D’s seven-person lighting design team. Smith joined Ring & DuChateau’s plumbing systems department in 2015 and has designed plumbing and fire protection systems for more than eight years. LaRosh, who has more than 13 years of experience in HVAC systems design and project management,  joined Ring & DuChateau’s HVAC systems group in 2017 as a project manager for corporate, municipal, healthcare and education facilities.