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 articles older than 15 days. Articles newer than 15 days are not included in this offer. Purchase Now Already have archive access? Login to view this article.