In 2026, ISG earned multiple national recognitions from Zweig Group, highlighting the firm's continued growth, strong workplace culture, and excellence in marketing. The awards included placement on the Best Firms To Work For list, recognizing outstanding workplace culture, and the Hot Firm list, noting the top 100 fastest-growing architecture, engineering, and construction (AEC) firms in the United States and Canada.
ISG also received recognition in the Marketing Excellence Awards, which honor the AEC industry's most effective marketing campaigns based on creativity, messaging, design, and impact. ISG received:


R.E. Warner & Associates has been named a Northeast Ohio Top Workplace for the fifth consecutive year, recognizing its commitment to employee engagement, workplace culture, and professional excellence.

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ISG’s Martin County Ditch No. 28 Nutrient Treatment Train project has received two honors: the 2026 ACEC Minnesota Engineering Excellence Grand Award and the ACEC National Engineering Excellence Award, recognizing innovative engineering solutions that improve drainage performance while protecting water quality.