The chapter “Remediation of Heavy Metals Through Genetically Engineered Microorganisms” addresses the critical environmental issue of heavy metal contamination in soil and water sources, highlighting the detrimental impact of these pollutants on living organisms. Conventional methods of heavy metal remediation are often ineffective and costly, underscoring the need for innovative and sustainable approaches. This chapter focuses on the application of genetically engineered microorganisms as a promising solution to remediate heavy metals efficiently and effectively. By combining molecular biology techniques, genetic engineering, and microbial ecology principles, the chapter explores strategies and mechanisms for designing and implementing genetically engineered microorganisms for heavy metal cleanup. Key advancements discussed include the development of metal-binding proteins, metal-reducing enzymes, and metal-resistant microbial strains, showcasing their potential to enhance remediation outcomes. Through this exploration, the chapter aims to contribute to the advancement of sustainable and cost-effective solutions for environmental cleanup, with broader implications for ecosystem health and human well-being.