O'Donnell/Snider Construction OSC began as an interior construction company, in 1991, delivering projects with unmatched customer service. During the past three decades, we have expanded to serve four diverse market sectors: New Construction, Healthcare, Landlord Services and Corporate Interiors. Today, over 90% of our business is generated from repeat clients and referrals. Our principles have guided us from the start, they define who we are tod...