Empirical Energy Elevates John Freeman (Movers & Shakers) by Arkansas Business Staff Posted 12/4/2017 12:00 am John Freeman has been promoted to principal at Empirical Energy Solutions in Little Rock. Freeman, who has experience in HVAC service, controls and commissioning, was previously a project manager. Want the Full Article? Get Unlimited Archive Access for $19.95 per Year Readers must pay to access stories older than 15 days. Purchase Now Already have archive access? Login to view this article.