RICI

3-Mar-2026

Microbiologist

POSITION: Microbiologist

location: Dammam

Job purpose:

To manage all the operations of laboratory (including samples collection, analysis, & reporting) and support in implementation of quality procedures.

Qualifications

. Preferred if having Bachelor of Microbiology or Science degree.

. With at least 2-5 years of relevant experience.

Skills

. Good in usage of LIMS and Microsoft Office (specifically excel).

. Awareness of ISO 17025:2017 requirement.

. Having good mathematic skills.

. Should be fluent in English.

Duties and responsibilities

1. Perform routine and laboratory tasks.

2. Obtain and analyze results, performing analyses such as bacteriology, and virology, parasitology, and mycology.

3. Assist in the development of interpretive protocols, policies, and procedures.

4. Conduct microbial tests, including plate counts, coliform counts, E. coli counts, Legionella counts, and yeast and mold counts, following current state standards.

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Test No.	Test Name	ASTM Standard Method	BS Standard Method
2	Sampling Freshly Mixed Concrete	ASTM C172	BS EN 12350-1
3	Temperature of Freshly Mixed Hydraulic-Cement Concrete	ASTM C1064	-
4	Slump of Hydraulic-Cement Concrete	ASTM C143	BS EN 12350-2
5	Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete	ASTM C138	BS EN 12350-6
6	Air Content of Freshly Mixed Concrete by the Pressure Method	ASTM C231	BS EN 12350-7
7	Making and Curing Concrete Test Specimens in the Field	ASTM C31	BS EN 12390-1/2
8	Density of Hardened Concrete	-	BS EN 12390-7
9	Water Storage Tanks Used in the Testing of Hydraulic Cements and Concretes	ASTM C511	-
10	Capping Cylindrical Concrete Specimens	ASTM C617	-
11	Compressive Strength of Cylindrical/ Cubical Concrete Specimens	ASTM C39	BS EN 12390-3

Serial Number	Test Name	ASTM Standard Method	BS Standard Method
1	Sampling Aggregates	ASTM D75	BS EN 932-1
2	Reducing Samples of Aggregate to Testing Size	ASTM C702	BS EN 932-2
3	Aggregate Moisture Content	-	BS 812-109
4	Sieve Analysis of Fine and Coarse Aggregates	ASTM C136	BS EN 933-1
5	Material Finer than 75-µm Sieve and 63-µm Sieve in Aggregates by Washing	ASTM C117	BS EN 933-2
6	Clay Lumps and Friable Particles in Aggregates	ASTM C142	-
7	Degradation of Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine	ASTM C131 / C535	-
8	Soundness of Aggregates by Use of Sodium Sulfate or Magnesium Sulfate	ASTM C88	BS 812-121
9	Density, Relative Density (Specific Gravity), and Absorption of Coarse Aggregate	ASTM C127	BS EN 1097-6
10	Density, Relative Density (Specific Gravity), and Absorption of Fine Aggregate	ASTM C128	BS EN 1097-7

Serial Number	Test Name	ASTM Standard Method
1	Standard practice for sampling bituminous paving mixtures	ASTM D979
2	Standard test method for moisture or volatile distillates in bituminous paving mixtures	ASTM D1461
3	Standard test method for theoretical maximum specific gravity and density of bituminous paving mixtures	ASTM D2041
4	Standard test method for quantitative extraction of bitumen from bituminous paving mixtures	ASTM D2172
5	Standard test method for bulk specific gravity and density of non-absorptive compacted bituminous mixtures	ASTM D2726
6	Standard practice for estimating application rate of bituminous distributors	ASTM D2995
7	Standard test method for percent air voids in compacted dense and open bituminous paving mixtures	ASTM D3203
8	Standard test method for thickness or height of compacted bituminous paving mixtures specimens	ASTM D3549
9	Standard practice for sampling compacted bituminous mixtures for laboratory testing	ASTM D5361
10	Standard test method for mechanical size analysis of extracted aggregate	ASTM D5444
11	Standard practice for preparation of bituminous specimens using Marshall apparatus	ASTM D6926
12	Standard test method for Marshall stability and flow of bituminous mixtures	ASTM D6927

Microbiologist

Microbiologist

Job purpose:

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Duties and responsibilities

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