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Hire Dr. Krishnakumar S.

India

USD 30 /hr

Research Scientist | Microbial Biotechnology | Environmental Microbiology | Functional Genomics | Scientific Consulting

Profile Summary

I am a Microbial Biotechnology and Environmental Microbiology Specialist/Scientist with over 15 years of experience conducting interdisciplinary research and providing scientific consulting at the interface of microbiology, molecular biology, genomics, biotechnology, and environmental engineering. My academic and professional journey includes a Doctorate in Sustainable Earth-Biofilm Engineering from Nanyang Technological University (NTU) Singapore, Masters in Environmental Engineering from the Indian Institute of Technology (IIT) Delhi, and research stints at internationally recognized institutions including King Abdullah University of Science and Technology (KAUST) Saudi Arabia, where I have contributed to multidisciplinary research programs addressing fundamental biological questions while developing practical solutions for environmental and industrial biotechnology. My expertise spans environmental microbiology, microbial biotechnology, microbial physiology, molecular microbiology, biofilm biology and engineering, anaerobic microbiology, microbial ecology, functional metagenomics, comparative genomics, functional genomics, genome-resolved microbial analysis, extremophilic enzyme biotechnology, industrial microbiology, and sustainable bioprocess development. Throughout my career, I have sought to understand how microorganisms function across multiple biological scales: from genetic and molecular mechanisms to individual cells, structured microbial communities, and complex environmental ecosystems and how these mechanistic insights can be translated into innovative and commercially relevant biotechnology applications. My research portfolio encompasses a broad range of multidisciplinary projects. My doctoral research at Singapore Center for Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University Singapore (NTU Singapore) focused on biofilm matrix-enabled functional microbial systems. This work addressed a fundamental challenge in applied microbiology: how to maintain functional stability and catalytic efficiency of biological systems under fluctuating environmental and operational conditions. By using Shewanella oneidensis as model organism, we developed a novel approach to engineer the biofilm matrix to exhibit extracellular biocatalytic activity. We also demonstrated that the extracellular bioactivity can be enhanced by the use of cell membrane intercalating conjugated oligoelectrolytes and by harnessing mutualistic interactions between diverse bacterial species in a microbial fuel cell and extracellular ferrihydrite reduction. This project applied engineering principles, "omics" approaches, molecular and genetic tools for functionalizing catalytic biofilms and explored the potential of biofilm matrix-enabled bioprocesses in biotechnological applications. During my postdoctoral research at KAUST's Water Desalination and Reuse Center (WDRC), I investigated the environmental regulation of microbial physiology, communication, and persistence in environmentally and industrially relevant microorganisms. One major research programme examined the influence of salinity on quorum sensing, sulfate reduction, and biofilm formation in sulfate-reducing bacteria (Desulfovibrio vulgaris and Desulfobacterium corrodens). This work demonstrated that saline conditions significantly enhanced sulfate reduction, N-acyl homoserine lactone (AHL)-mediated quorum sensing, and biofilm formation. RT-qPCR analyses revealed coordinated upregulation of genes associated with carbon metabolism, sulfate reduction, biofilm development, and histidine kinase-mediated signal transduction. The use of quorum sensing inhibitors established a functional relationship between microbial signalling and sulfate metabolism, providing mechanistic evidence that quorum quenching strategies may offer practical solutions for mitigating microbiologically influenced corrosion in saline industrial systems. In parallel, I investigated the survival dynamics and adaptive physiology of multidrug-resistant Escherichia coli PI-7 under chlorination, ultraviolet irradiation, and solar disinfection. Through random transposon mutagenesis, I generated transposon insertion library of E. coli PI-7 mutants exhibiting altered virulence-associated phenotypes and evaluated their responses to oxidative stress and engineered disinfection systems. The work demonstrated that enhanced biofilm formation, motility, curli production, oxidative stress tolerance, extracellular polymeric substance production, and internalization capacity collectively promoted prolonged persistence following disinfection. These findings provided mechanistic insights into microbial resilience, pathogen persistence, selective enrichment following wastewater treatment, and the environmental factors governing microbial succession in engineered aquatic ecosystems. A defining component of my research portfolio has been my collaboration with Saudi Aramco's EXPEC-ARC while working as a Research Scientist in Professor Takashi Gojobori's Comparative Genomics and Genetics Laboratory at KAUST. This project focused on the discovery, engineering, and optimization of indigenous extremophilic enzymes for application as highly thermostable fracturing fluid breakers in oilfield operations. I led the development of multifunctional fusion enzyme constructs combining Bacillus-derived β-mannanase with Thermotoga-derived α-galactosidase using the SpyTag-SpyCatcher covalent protein coupling platform. The engineered biocatalysts retained catalytic activity above 100°C, exhibited exceptional thermal stability, prolonged operational lifetimes, and reduced solvent dependency under oilfield-relevant conditions. Beyond their industrial application, these studies generated broader insights into protein stability, comparative enzyme kinetics, adaptive catalytic mechanisms, and functional resilience under extreme physicochemical environments. More recently, my research has focused on the functional metagenomics and genome-resolved characterization of extremophilic microbial communities enriched from Saudi Arabian desert environments. As part of Professor Robert Hoehndorf's Bio-Ontology Research Group at KAUST, I developed comprehensive end-to-end discovery pipelines integrating environmental sampling, targeted aerobic and anaerobic enrichment, microbial cultivation, high-throughput sequencing, metagenome assembly, comparative genomics, functional annotation, pathway reconstruction, and downstream functional validation. These workflows enabled the recovery of both culturable and previously unexplored microorganisms, leading to the identification of highly stress-tolerant microbial consortia, novel metabolic pathways, extremozymes, and gene clusters with significant industrial biotechnology potential. The work has also provided valuable insights into microbial community assembly, ecological adaptation, genome-to-function relationships, and strategies for accelerating enzyme discovery from extreme environments. Collectively, these projects have provided extensive expertise in biofilm architecture and extracellular polymeric substance regulation; redox-active biofilms and extracellular electron transfer; microbial stress tolerance and persistence; environmental modulation of microbial interactions; anaerobic microbiology; functional metagenomic mining; genome-resolved metagenomic analysis; comparative genomics; gene expression analysis; RT-qPCR; functional validation of metabolic pathways; comparative enzyme kinetics; thermostability profiling; recombinant fusion enzyme engineering; industrial biocatalyst development; laboratory-scale simulation of subsurface reservoir environments; microbial enrichment under aerobic and anaerobic conditions; microscopy-based morphological characterization; molecular marker-based microbial identification; sequencing-based microbial community analysis; functional annotation; pathway reconstruction; and the design of integrated discovery pipelines spanning field sampling through functional validation and biotechnology translation. This breadth of experience could enable me to support clients across the entire research and innovation pipeline: from experimental design and laboratory methodology to genomic data analysis, scientific writing, biotechnology R&D, enzyme discovery, microbial systems engineering, and translation of complex biological findings into practical industrial and environmental applications. In addition to academic research, I have harnessed experience working across university, industrial, and interdisciplinary environments, including environmental biotechnology, wastewater treatment, microbial process optimization, and industry-sponsored biotechnology programs. These experiences have strengthened my ability to translate scientific discoveries into practical solutions while collaborating effectively with microbiologists, molecular biologists, environmental engineers, computational scientists, bioinformaticians, and industrial R&D teams. I would be pleased to support clients across the full spectrum of the research and innovation lifecycle, from project conception and study design to data interpretation, scientific communication, and technology translation. My areas of expertise include research strategy development, hypothesis generation, experimental and study design, methodology optimization, comprehensive literature reviews, systematic reviews and meta-analyses, scientific manuscript preparation, grant and proposal writing, technical editing, publication support, statistical analysis, and interpretation of complex biological datasets. I also provide scientific support in comparative and functional genomics, functional metagenomics, microbial ecology, environmental microbiology, enzyme biotechnology, microbial physiology, and biotechnology-focused research and development, with the aim of helping clients develop scientifically rigorous and well-structured research programmes. My technical experience encompasses molecular microbiology, microbial physiology, anaerobic microbiology, biofilm biology and characterization, RT-qPCR, microbial enrichment under aerobic and anaerobic conditions, functional screening, comparative genomics, genome-resolved metagenomics, genome annotation, pathway reconstruction, microbial community analysis, high-throughput sequencing workflows, and the integration of molecular, physiological, genomic, and ecological datasets. This multidisciplinary background has enabled me to work with a wide range of experimental and computational datasets while adopting an integrated approach to understanding complex biological systems and translating scientific observations into meaningful biological insights. Throughout my academic and research career, I have had the privilege of collaborating with researchers, universities, biotechnology companies, industrial partners, and multidisciplinary teams across a diverse range of scientific disciplines. These experiences have strengthened my appreciation for collaborative research, scientific integrity, reproducibility, clear communication, and careful attention to detail—qualities that I consider fundamental to successful scientific partnerships. Whether collaborating with academic researchers, biotechnology companies, start-ups, contract research organizations, or industrial R&D teams, I strive to provide thoughtful, reliable, and evidence-based scientific support that is aligned with the specific objectives of each project. I approach every collaboration with professionalism, intellectual curiosity, and a strong commitment to scientific quality, and I value the opportunity to contribute my experience to projects that advance both fundamental understanding and practical innovation. My goal is to work collaboratively with clients to help address challenging scientific questions and support the successful delivery of high-quality research outcomes. Research Expertise and Technical Competencies Throughout my research career, I have developed extensive expertise across the following areas: • Environmental microbiology and microbial ecology • Microbial biotechnology and industrial biotechnology • Biofilm biology, architecture, maturation, and extracellular polymeric substance (EPS) regulation • Microbial physiology, environmental adaptation, and stress-response mechanisms • Anaerobic microbiology and sulfate-reducing bacterial physiology • Quorum sensing, microbial communication, and quorum quenching strategies • Microbial persistence, oxidative stress tolerance, and pathogen survival under environmental and engineered stresses • Virulence-associated traits, microbial resilience, and adaptive evolutionary responses • Microbial interactions, community assembly, and ecological succession • Functional metagenomics for enzyme discovery and microbial resource mining • Genome-resolved metagenomics, comparative genomics, and functional genomics • Genome annotation, pathway reconstruction, and metabolic network analysis • Gene expression analysis and transcriptional profiling (RT-qPCR) • Molecular marker-based microbial identification and taxonomic characterization • Integration of physiological, molecular, genomic, and ecological datasets • Discovery and characterization of stress-tolerant microorganisms and extremophiles • Enrichment, isolation, and cultivation of aerobic and anaerobic microbial communities • Development of end-to-end microbial discovery pipelines from environmental sampling to functional validation • Engineering and optimization of recombinant enzymes and multifunctional fusion proteins • Comparative enzyme kinetics, protein engineering, and thermostability optimization • Discovery and development of extremozymes for industrial biotechnology applications • Surface-associated microbial activity, extracellular catalysis, and redox-active biofilm engineering • Extracellular electron transfer and bioelectrochemical microbial systems • Laboratory-scale simulation of environmental and subsurface reservoir conditions • High-throughput sequencing workflows, metagenome assembly, and functional annotation • Experimental design for multidisciplinary microbiology and biotechnology research • Integration of experimental microbiology with molecular biology, genomics, and systems-level biological interpretation • Translation of fundamental microbial research into environmental, industrial, and biotechnology applications Scientific Consulting Services I also provide consulting support in the following areas: • Research strategy development and hypothesis formulation • Experimental design and methodology optimization • Scientific literature reviews and systematic reviews • Meta-analysis and evidence synthesis • Scientific manuscript writing and publication support • Grant proposal development and technical editing • Interpretation of microbiological, molecular, genomic, and biotechnology datasets • Biotechnology R&D strategy and scientific due diligence • Comparative genomics and functional metagenomic data analysis • Enzyme discovery, microbial process optimization, and biotechnology innovation • Research project planning, troubleshooting, and technology translation

Subject Matter Expertise

• ☆ Evolutionary Biology
• ☆ Botany
• ☆ Plant Pathology
• ☆ Microbiology
• ☆ Microbiome Research
• ☆ Industrial Microbiology
• ☆ Microbiological Assays
• ☆ Agricultural Microbiology
• ☆ Molecular Biology
• ☆ Molecular Evolution
• ☆ Molecular Cloning
• ☆ Gene Expression Analysis
• ☆ Molecular Ecology
• ☆ Cell Biology
• ☆ Cell Signaling Pathways
• ☆ Comparative Physiology
• ☆ Marine Biology
• ☆ Biotechnology & Bioengineering
• ☆ Recombinant Protein Expression
• ☆ Nanobiotechnology
• ☆ Biological Systems Engineering
• ☆ Biomass & Bioenergy
• ☆ Biological Engineering
• ☆ Environmental Engineering and Technology
• ☆ Environmental Science
• ☆ Environmental Biotechnology
• ☆ Environmental Remediation
• ☆ Ecology
• ☆ Biodiversity
• ☆ Microbial Ecology
• ☆ Pathogenesis
• ☆ Clinical Microbiology
• ☆ Cell Surface Receptors
• ☆ Industrial Biotechnology
• ☆ Bioenergy & Biofuels
• ☆ Agricultural Biotechnology
• ☆ Biomolecular Engineering
• ☆ Protein/Enzyme Engineering
• ☆ Biological Taxonomy/Classification
• ☆ Hypothesis
• ☆ Peer Review
• ☆ Research Methodology
• ☆ Meta-Research
• ☆ Feasibility Studies
• ☆ Literature Search
• ☆ Gap Analysis
• ☆ Gray Literature Search
• ☆ Technical & Scientific Writing
• ☆ Journal Selection
• ☆ Manuscript & Journal Article Writing
• ☆ Experimental Protocols
• ☆ SOP & Protocol Writing
• ☆ Case Studies
• ☆ Textbook Content Writing
• ☆ Science Communication
• ☆ Literature Review
• ☆ Traditional/Narrative Literature Review
• ☆ Systematic Literature Review
• ☆ Scientific Proofreading & Editing
• ☆ Proofreading & Editing
• ☆ Grant Writing

Services

• Writing
• Research
• Consulting
• Data & AI
• Product Development

Writing Non-Medical Regulatory Writing, Technical Writing, Copywriting, Creative Writing, Newswriting, General Proofreading & Editing

Research Meta-Research, Feasibility Study, Technology Scouting, Gap Analysis, Gray Literature Search, Scientific and Technical Research, Systematic Literature Review

Consulting Operations Consulting, Scientific and Technical Consulting

Data & AI Text Mining & Analytics, Data Mining, Data Cleaning, Data Insights

Product Development Formulation, Product Evaluation, Concept Development, Prototyping

Work Experience

Biologist/Research Scientist

King Abdullah University of Science and Technology

August 2025 - Present

Biologist/Research Scientist

King Abdullah University of Science and Technology

July 2022 - July 2025

Postdoctoral Researcher

King Abdullah University of Science and Technology

July 2020 - July 2022

PostdoctoralResearcher

King Abdullah University of Science and Technology

July 2018 - July 2020

PostdoctoralResearcher

King Abdullah University of Science and Technology

July 2017 - July 2018

Research scientist / Research fellow

Nanyang Technological University

May 2016 - June 2017

Education

PhD in Sustainable Earth-Biofilm Engineering (Research Domain: Environmental Microbiology)

Nanyang Technological University Singapore

January 2012 - August 2016

Masters in Environmental Engineering and Management (M.Tech)

Indian Institute of Technology Delhi

July 2006 - May 2008

Bachelors of Technology (B.Tech) in Civil Engineering

College of Engineering Thiruvananthapuram Kerala University

July 2002 - May 2006

Certifications

• Certification details not provided.

Publications

JOURNAL ARTICLE

Krishnakumar Sivakumar, Robert Lehmann, Andri Taruna Rachmadi, Nicolas Augsburger, Noor Zaouri, Jesper Tegner, Pei-Ying Hong (2020). Elucidating the Role of Virulence Traits in the Survival of Pathogenic E. coli PI-7 Following Disinfection . Frontiers in Bioengineering and Biotechnology.

Krishnakumar Sivakumar, Giantommaso Scarascia, Noor Zaouri, Tiannyu Wang, Anna H. Kaksonen, Pei-Ying Hong (2019). Salinity-Mediated Increment in Sulfate Reduction, Biofilm Formation, and Quorum Sensing: A Potential Connection Between Quorum Sensing and Sulfate Reduction? . Frontiers in Microbiology.

Krishnakumar Sivakumar, Victor Bochuan Wang, Liang Yang, Qichun Zhang, Staffan Kjelleberg, Say Chye Joachim Loo, Bin Cao (2015). Metabolite-enabled mutualistic interaction between Shewanella oneidensis and Escherichia coli in a co-culture using an electrode as electron acceptor . Scientific Reports.

Krishnakumar Sivakumar, Song Lin Chua, Morten Rybtke, Mingjun Yuan, Jens Bo Andersen, Thomas E. Nielsen, Michael Givskov, Tim Tolker-Nielsen, Bin Cao, Staffan Kjelleberg, et al. (2015). C-di-GMP regulates Pseudomonas aeruginosa stress response to tellurite during both planktonic and biofilm modes of growth . Scientific Reports.

Krishnakumar Sivakumar, Manisha Mukherjee, Hsin‐I Cheng, Yingdan Zhang, Lianghui Ji, Bin Cao (2015). Surface display of roGFP for monitoring redox status of extracellular microenvironments in <i>Shewanella oneidensis</i> biofilms . Biotechnology and Bioengineering.

Krishnakumar Sivakumar, Victor Bochuan Wang, Xiaofen Chen, Guillermo C. Bazan, Staffan Kjelleberg, Say Chye Joachim Loo, Bin Cao (2014). Membrane permeabilization underlies the enhancement of extracellular bioactivity in Shewanella oneidensis by a membrane-spanning conjugated oligoelectrolyte . Applied Microbiology and Biotechnology.

Krishnakumar Sivakumar, Victor Bochuan Wang, Nathan D. Kirchhofer, Xiaofen Chen, Melissa Yuan Li Tan, Bin Cao, Qichun Zhang, Staffan Kjelleberg, Guillermo C. Bazan, Say Chye Joachim Loo, et al. (2014). Comparison of flavins and a conjugated oligoelectrolyte in stimulating extracellular electron transport from Shewanella oneidensis MR-1 . Electrochemistry Communications.

Krishnakumar Sivakumar, Victor Bochuan Wang, Song-Lin Chua, Zhao Cai, Qichun Zhang, Staffan Kjelleberg, Bin Cao, Say Chye Joachim Loo, Liang Yang (2014). A stable synergistic microbial consortium for simultaneous azo dye removal and bioelectricity generation . Bioresource Technology.

Krishnakumar Sivakumar, Chun Kiat Ng, Xin Liu, Munusamy Madhaiyan, Lianghui Ji, Liang Yang, Chuyang Tang, Hao Song, Staffan Kjelleberg, Bin Cao (2013). Influence of outer membrane <i>c</i>‐type cytochromes on particle size and activity of extracellular nanoparticles produced by <i>Shewanella oneidensis</i> . Biotechnology and Bioengineering.

CONFERENCE PAPER

Krishnakumar Sivakumar Display of RoGFP on cell surface enables in-situ quantification of extracellular redox status in biofilms. 14 AIChE Annual Meeting, Atlanta, GA, USA.

Krishnakumar Sivakumar Elucidating the potential role of quorum sensing in sulfate reducing bacteria and its possible link to biocorrosion. Biofilms 8, Aarhus, Denmark.

Krishnakumar Sivakumar Elucidating the role of virulence traits in abating solar irradiation-based decay. IWA: Microbial Ecology and Water Engineering Specialist Conference, Hiroshima, Japan.

Krishnakumar Sivakumar Engineering Catalytic biofilms for extracellular hydrolysis of Mannan polysaccharides. 15 AIChE Annual Meeting, Salt Lake City, UT, USA.

Krishnakumar Sivakumar Harnessing a highly thermostable enzymatic fracturing fluid breaker through synergistic interactions between Bacillus-based beta-mannanase and Thermotoga-based alpha-galactosidase. Computational Biology Conference, Indian Biological Data Centre, Regional Centre for Biotechnology, Faridabad, Haryana, India.

Krishnakumar Sivakumar Quorum sensing inhibition reduces biofilm formation and biocorrosion associated with Desulfovibrio vulgaris. IWA: Microbial Ecology and Water Engineering Specialist Conference, Hiroshima, Japan.

Krishnakumar Sivakumar Understanding the Role & Harnessing the Power of a Matrix-Associated Protein BpfA. IWA Conference: The Perfect Slime, Essen, Germany.