Lab Assistant – In Vitro

Company Name: Charles River Laboratories

Location: Horsham, PA, US - 19044

Job Duration: 2021-09-12 to 2021-10-12


For nearly 70 years, Charles River employees have worked together to assist in the discovery, development and safe manufacture of new drug therapies. When you join our family, you will have a significant impact on the health and well-being of people across the globe. Whether your background is in life sciences, finance, IT, sales or another area, your skills will play an important role in the work e perform. In retrn, we’ll help you build a career that you can feel passionate about.



Perform basic laboratory and record-keeping tasks. Support the functions of the in-life, necropsy and formulation/analytical groups. 


  • Wash and dry glassware and distribute to appropriate locations within the laboratory. Keep glass-washing area clean and organized. May sterilize glassware and other items using an autoclave.
  • Label collection tubes and perform laboratory set-up/clean-up (e.g., dusting, mopping floors, emptying & filling feed jars, etc).
  • Perform basic husbandry duties such as liner changes or filling of feed jars.
  • Verify and record the temperature of assigned refrigerators or freezers.
  • Assist in the archiving of study-specific samples (e.g. back-up formulations, biological liquids or animal tissues).
  • Assist in preparing for animal arrivals. This may include preparing cages (attaching water lines, feed jars, cage tag holders), ensuring sippers work, ensuring cages are appropriate for species being housed and placing cage tags on the holders.
  • Process biological samples (e.g. plasma, serum, whole blood, urine, etc.) for possible analysis.
  • Assist technical personnel with clerical duties (e.g., filing, making copies, cage tags, etc.).
  • Monitor and maintain inventory and stock assigned areas (e.g. PPE Stations, 1st aid boxes).
  • May record observations and measurements for basic lab/research task (e.g. behavioral evaluations).
  • Handle, restrain, and transfer small to medium size animals from one location to another. 
  • Operate basic lab equipment and perform routine maintenance as needed.
  • Perform limited troubleshooting and calibration of instruments as appropriate for assigned area.
  • May be responsible for preparing simple lab solutions (e.g., buffers, media/common vehicles, bleach, and eye wash)).
  • May generate reports, master data sheets,   forms and hand record data.
  • Perform all tasks in compliance with Good Laboratory Practice Regulations (GLPs) and Standard Operating Procedures (SOPs).
  • Transport, via company vehicles (truck, golf cart or car) supplies to multiple buildings (e.g. test articles, bio-hazard boxes, dry ice, reagents, etc
  • Perform all other related duties as assigned.


  • Education:  High school diploma or General Education Degree (G.E.D.).
  • Experience:  None.
  • An equivalent combination of education and experience may be accepted as a satisfactory substitute for the specific education and experience listed above.
  • Certification/Licensure:   Must have valid, state-issued, driver’s license.
  • Other:  Must be detail-oriented and have general familiarity with lab procedures.  Good verbal communication skills required. Basic computer skills; familiarity with Microsoft Office software.

Equal Employment Opportunity


Charles River Laboratories, Inc. is an Equal Opportunity Employer M/F/Disabled/Vet


About Safety Assessment

Charles River is committed to helping our partners expedite their preclinical drug development with exceptional safety assessment services, state-of-the-art facilities and expert regulatory guidance. From individual specialty toxicology and IND enabling studies to tailored packages and total laboratory support, our deeply experienced team can design and execute programs that anticipate challenges and avoid roadblocks for a smooth, efficient journey to market.  Each year approximately 120 investigational new drug (IND) programs are conducted in our Safety Assessment facilities.

About Charles River

Charles River is an early-stage contract research organization (CRO). We have built upon our foundation of laboratory animal medicine and science to develop a diverse portfolio of discovery and safety assessment services, both Good Laboratory Practice (GLP) and non-GLP, to support clients from target identification through preclinical development. Charles River also provides a suite of products and services to support our clients’ clinical laboratory testing needs and manufacturing activities. Utilizing this broad portfolio of products and services enables our clients to create a more flexible drug development model, which reduces their costs, enhances their productivity and effectiveness to increase speed to market.

With over 11,000 employees within 70 facilities in 18 countries around the globe, we are strategically positioned to coordinate worldwide resources and apply multidisciplinary perspectives in resolving our client’s unique challenges.  Our client base includes global pharmaceutical companies, biotechnology companies, government agencies and hospitals and academic institutions around the world. And in 2016, revenue increased by 23.3% to $1.68 billion from $1.36 billion in 2015. 

At Charles River, we are passionate about our role in improving the quality of people’s lives. Our mission, our excellent science and our strong sense of purpose guide us in all that we do, and we approach each day with the knowledge that our work helps to improve the health and well-being of many across the globe. We have proudly supported the development of ~70% of the drugs approved by the FDA in 2016.

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