Top 45 Data Center Construction Firms for 2019. Whiting-Turner, Turner, Holder, DPR, and Fortis top the rankings of the nation's largest data center sector contractors and construction management firms, as reported in Building Design+Construction 's 2019 Giants 300 Report. Last year, Aligned Energy began expanding its data center campus in. These rates have stayed low from 2016 to 2019, especially in 2018 when vacancy rates peaked at 40 per cent due to new supply. "With the temporary pause in building new data centres, the vacancy. The building façade will be constructed with a perforated lightweight material that allows airflow and provides glimpses of the modern mechanical equipment inside. Facebook has selected Fortis Construction as general contractor for the Singapore data centre. Fortis has previously built efficient data centres for Facebook.