Top 50 international design firms for sewer and solid waste

20 December 2021

Hassan Allam Holding is proud to announce that it has been named among Engineering News-Record’s (ENR) top 50 international design firms for sewer and solid waste. The lists are aggregated based on total specialty-specific revenues. The rankings attest to the volume of projects undertaken by HAH globally and solidify the group’s reputation as a group of choice for local, regional, and international partners. The group’s design subsidiary Bioworks Verfahrenstechnik is one of the leading firms in wastewater treatment. Since its foundation, Bioworks has realized more than 120 projects in 25 different companies worldwide, providing first-class design and engineering services with state-of-the-art technologies for wastewater treatment.