Zerisenai Sium

Medical Laboratory Scientist with notable experience of conducting a broad spectrum of laboratory tests in clinical settings. Proficient in all core laboratory areas including chemistry, hematology, blood banking, microbiology, Urine and body fluids, and immunology. Adept at maintaining high-quality standards, equipment troubleshooting, and meeting departmental goals by delivering accurate and timely laboratory results.

Enthusiastic about collaborating and strengthening cross-departmental relationships.

Medical Lab Scientist at Northwestern Medical Center (2026-02 – 2026-05)

• Perform diagnostic testing in all laboratory sections, ensuring accurate and timely results.
• Responsible for specimen processing, instrument calibration and maintenance, quality control, and adherence to regulatory and accreditation standards using the Ortho Vitros 7600 Chemanalyzer.
• Responsible for the workflow in the blood banking including, Typing-and-Screening, Cross-matching, Ab identification, Ordering, issuing and replacing blood products units.
• Responsible for the identification, reporting, and communication of critical results in the molecular section of the laboratory.
• Monitor inventory, order to replenish inventory, and coordinate required the necessary Blood units, reagents, and quality control reagents from their respective suppliers.
• Ensure that I'm observing the required regulatory agencies guidelines all the time and participate in the periodic review of proficiency and tests.

Partner / Supervisor at Portland Hot Tubs, Swim Spas & More (2024-02 – 2025-05)

• Handled overall responsibility for the delivery of quality product, and services.
• Responsible for carrying out daily operations, which include ordering hot tubs, swim spas, parts, and accessories.
• Ensured the after-sales service meets customer and quality requirements.

QA Engineer II at Watlow (2016-03 – 2023-11)

Developed, Implemented, and Participated in the optimization of workflows, Characterization of samples, and chemicals, and ensuring safety protocols are observed by:

• Contributed to the capacity-building of the laboratory by developing and validating analytical methods and procedures in the trace metal analysis of different components.
• Utilized analytical tools such as (ICPMS) to evaluate samples for trace metals levels.
• Evaluated residual gases in samples using tandem GC-MS.
• Ensured quality product release by using non-intrusive failure analysis tools such as Scanning Acoustic Microscopy (C-SAM), and Thermal Imaging Infrared Camera (IR).
• Help the Company attain its profit target by participating in the R &D projects, characterization of polymer materials using thermal, mechanical, and analytical equipment.
• Optimized the wet lab in its cleaning Chemicals preparation, reagents use, maintenance of clean room standards for the ICPMS analysis by developing SOPs, and protocols.
• Increased sample throughput by cutting the data processing, report compilation, and optimization of the periodic maintenance of the laboratory equipment.

Engineer I at Watlow (2016-03 – 2018-08)

Responsible for the optimization of workflows in the trace-metal analysis section, and ensuring safety protocols are observed by:

• Contributed to the productivity of the laboratory by developing and validating analytical methods and procedures in the trace metal analysis of different components.
• Utilized analytical tools such as (ICPMS) to evaluate samples for trace metals levels.
• Used Wet-Chemistry methods in the quantitative, and qualitative analyses of samples.

Clinical Laboratory Scientist at NEMedLab Plc. (2012-03 – 2015-01)

• Worked in the urine and body fluids laboratory section to evaluate and report repeatable test results using the established protocol.
• In the microbiology section, performed specimen collection, culture setup, evaluation, processing and interpretation for routine clinical specimens in accordance with laboratory SOPs.
• Selected and prepared appropriate culture media and performed antibiotic susceptibility testing based on specimen type and clinical indication.
• Utilized microscopic examination, automated, and molecular methods for detection and identification of microorganisms.
• In the hematology section, prepared and evaluated peripheral blood smears; performed manual differentials, performed complete blood counts (CBCs) and reviewed flagged results.
• Conducted miscellaneous hematology testing including ESR, sickle cell screening, and reticulocyte counts.
• Routine coagulation testing (PT, aPTT, fibrinogen, D-dimer), and special coagulation testing including factor assays and platelet function studies.
• In the Chemistry section of the lab, performed specimen collection, evaluation, and processing for chemistry testing.
• Conducted routine and specialized chemistry analyses including electrolytes, blood gases, glucose, BUN, creatinine, bilirubin, enzymes, lipids, and proteins.
• Immunoassays, endocrinology testing, and tumor marker analysis, therapeutic drug monitoring and toxicology testing.
• At the blood bank section of the laboratory, performed specimen evaluation, and processing for transfusion testing, ABO and Rh typing, antibody screening, and antibody identification.
• Performed compatibility testing and crossmatching, assisted with HDFN testing and transfusion reaction investigations.
• Performed blood component receipt, storage, issue, and utilization according to policy.
• On samples of body fluids and urine, performed physical examinations including specific gravity, Osmolality, Color and Clarity.
• Performed Chemical and microscopic test that included identifying Microorganisms, Casts, cells, etc.
• Interpretation of these tests to relate to disease states.
• Across the different sections of the laboratory, performed routine instrument preventive maintenance and basic troubleshooting.
• Production of valid, and repeatable data that is recorded by maintaining QC/QA records, and complying with laboratory Standard procedures, and safety standards.

Safety, Quality, and Environment Adviser at TotalEnergies (2007-02 – 2011-02)

• Worked as a focal person in issues regarding products' (lubricants and gases) quality; Soil and water quality evaluation in station's licensing; and observance of local and corporate laws and regulations.
• Ensured legal compliance by verifying and adhering to specifications that petroleum products' lab results meet requirements.
• Coordinated laboratory tests, and submitted timely reports on health, water, soil, and other relevant tests.
• Oversaw the implementation of a quality system (ISSSRS i.e., International Small Site Safety Rating System) that minimized incidents across two depots, and one aviation terminal.

Area manager, and Lead Internal Audit at Red-Sea Bottlers Sh. Co. (2000-02 – 2007-01)

• Assisted the bottling plant obtain the required quality certification by coordinating the audit processes of the different departments.
• Increased the output capacity of the QC department by coordinating the stake-holder departments' activity in achieving the set-goals of reaching phase-2 of TQM (Total Quality Management) certification.
• Enhanced capacity building in the Quality Assurance department by writing SOPs, customizing standard procedures, training staff, and conducting processes and reporting results.
• Increased operational efficiency by developing SOPs, implementing periodic equipment test, and maintenance, and implementing "customer response program."

Clinical Lab Chemist at Berhan Medical Laboratory (1998-02 – 2000-01)

• Performed the requirements of a clinical lab scientist in compliance with the procedures of the clinic in collecting, processing, evaluating specimens, and reporting results.
• Applied analytical methodology in analyzing body electrolytes, blood gases, glucose, BUN, creatinine, and enzymes.
• Utilized test procedures of Immunoassay, Endocrinology and tumor markers, in the diagnosis of patients.
• Performed microbiological specimen labeling, collection, processing from stains to microscopic identification, and interpretation.
• Routinely utilized Quality control / assurance tasks to produce accurate, and reliable test results.
• Participated in the Laboratory safety upkeep, and Instrumental preventive maintenance and troubleshooting.

Bachelor of Science in Chemistry – University of Asmara