Infrastructure and Energy Alternatives, Inc. revises earnings guidance for the full year ending December 31, 2021. For the period, the company is raising the lower end of its revenue guidance range and now anticipates revenue in the range of $1.80 billion to $1.95 billion, as compared to $1.75 billion to $1.95 billion, previously. Net income in the range of $4,000,000 against $11,500,000 a year ago.