Caroline O`Sullivan

Business Unit Leader

I became part of the QCS Staffing family back in 2006 and have worked in all parts of the recruiter role. Starting off as a resourcer / delivery executive finding those excellent candidates, I quickly moved into a consultant role supporting the clients, and have moved all the way through to managing teams supporting our global client base. I am currently a Business Unit Leader within the life science team supporting both clients and candidates through the recruitment process.

I have been recruiting within the lifescience industry since 2007 and I have a fantastic understanding of delivering for both client and candidate requirements.

One of the best parts of the job would be actually getting to know our clients, contractors and the bar staff at the most popular pubs near the client site.

Outside of work I am a mum to a beautiful little boy and enjoy taking the dog out, going to the park or meeting up with friends.

View our latest jobs

Senior Validation Engineer

ContractSeattle, Washington, United States

Senior Validation Engineer - US, Seattle - 4 Months Initial ContractOur client, a global biotechnology organisation, is recruiting for a Senior Validation Engineer to join their capital project in Seattle. This new build facility will house a therapeutic protein production plant, and we are looking for a Senior Validation Engineer to help expand our client's biotech operations throughout Europe. As the Senior Validation Engineer you will be responsible for implementing all safety requirements for a new build facility, estimated at approximately 14,900m2.What you’ll do: Lead the planning, development, and execution of EMPQ protocols (IQ/OQ/PQ) for new and existing equipment, utilities, and process systems.Write clear, compliant, and technically robust EMPQ protocols aligned with GMP, GAMP 5, and site validation master plans.Execute EMPQ protocols on the manufacturing floor, ensuring accurate data capture and adherence to safety and GMP requirements.Ensure validation activities comply with FDA, MHRA, EU Annex 15, and other applicable regulatory frameworks.Partner with Engineering, Facilities, Manufacturing, Quality Assurance, and external vendors to ensure equipment readiness and qualification success. What you’ll need: Bachelor’s degree in Engineering, Life Sciences, or related technical discipline.Extensive experience in validation within GMP-regulated industries (pharmaceutical, biotech, medical devices, or similar).Proven expertise in EMPQ, including authoring and executing IQ/OQ/PQ protocols.Strong understanding of regulatory requirements: FDA 21 CFR Parts 210/211, EU GMP, Annex 15, GAMP 5.Exceptional technical writing skills and ability to produce clear, audit-ready documentation. If this role is of interest, please apply now!#LI-CO1

Validation Engineer

ContractSeattle, Washington, United States

Validation Engineer - US, Seattle - 4 Months Initial ContractOur client, a global biotechnology organisation, is recruiting for a Validation Engineer to join their capital project in Seattle. This new build facility will house a therapeutic protein production plant, and we are looking for a Validation Engineer to help expand our client's biotech operations throughout Europe. As the Validation Engineer you will be responsible for implementing all safety requirements for a new build facility, estimated at approximately 14,900m2.What you’ll do: Plan, develop, and execute qualification activities (URS, RA, IQ/OQ/PQ) for QC laboratory instruments and systems.Author clear, compliant qualification protocols and reports for QC equipment.Maintain qualification status throughout the equipment lifecycle, including periodic reviews, requalification, and retirement.Ensure QC equipment qualification meets regulatory requirements (FDA, MHRA, EU GMP, Annex 15).Work closely with QC analysts, QA, Engineering, IT, and vendors to ensure equipment readiness and compliance. What you’ll need: Bachelor’s degree in Engineering, Life Sciences, Chemistry, or related technical field.Experience in a GMP-regulated QC laboratory environment (pharmaceutical, biotech, ATMP, or medical devices).Hands-on experience with QC equipment qualification (IQ/OQ/PQ).Strong understanding of analytical laboratory instruments (e.g., HPLC, GC, UV-Vis, PCR, balances, incubators).Excellent technical writing and documentation skills. If this role is of interest, please apply now!#LI-CO1

Senior Project Manager

PermanentRemote work, United States

Senior Project Manager - US, Remote Working - Permanent ContractQCS staffing are partnered with one of the world’s top AI infrastructure companies. As an organisation, our client are leading a new era in cloud computing to serve the global AI economy. They create the tools and resources for their customers requirement to solve real-world challenges and transform industries, without massive infrastructure costs or the need to build large in-house AI/ML teams. To support our client’s continued growth, they are currently looking to hire a Senior Project Manager to work remotely within the US.What you’ll do: Oversee full lifecycle delivery of AI data center construction projects, including planning, permitting, procurement, execution, and handover.Work closely with engineering teams to translate high-density compute and liquid cooling requirements into construction-ready documentation.Build strong relationships with contractors, local authorities, utility partners, and equipment suppliers.Ensure adherence to safety policies, local building regulations, and environmental standards. What you’ll need: Extensive construction project management experience, with at least 5 years in mission critical facilities (data centers, semiconductor, HPC, or similar).Demonstrated expertise in AI data centers, HPC environments, or other high-density compute facilities.Hands-on experience with liquid cooling systems (direct to chip, immersion cooling, or advanced heat exchanger systems).Proven track record of delivering large-scale construction projects (>$100M preferred) in fast-paced, technology-driven environments. If this role is of interest to you, please apply now! #LI-IG1

Senior Scientist

ContractDublin, County Dublin, Ireland

Senior Scientist - Ireland, Dublin - 12 Month ContractOne of the top 10 best companies to work in Ireland is looking for a Senior Scientist for their large-scale new facility in Dublin. Is this you? An exciting project there is lots of opportunity to learn new technology and develop current skills within a fast paced €1 billion project. This fantastic client offers the opportunity to work within a large-scale environment with cutting edge technology.What you’ll do: Provide technical oversight and ownership of analytical methods. This includes partnering with analytical development to ensure method readiness for validation, assisting with validation protocols, gathering data generated by analytical development/QC labs and assisting with validation reports.Lead complex projects and lead a team of scientists to meet deadlines and collaborate with key stakeholder groups.Provide technical oversight of method revisions.Lead method transfers to QC GMP labs within and outside of the company. What you’ll need: Specific Knowledge, Skills, Abilities, etc:Demonstrated trouble shooting and hands on experience with protein separation methods, for example, CE_SDS or iCIEF Electrophoresis, HPLC and UPLC Chromatography including Size-Exclusion chromatography, ion exchange and UVIS spectroscopy based technologies.Good understanding of the fundamentals of protein characterisation methods such as peptide mapping, and carbohydrate analysis.Experience leading complex projects, projects teams and meeting tight deadlines If this role is of interest, please apply now!#LI-JS4

Field Service Technician

PermanentSydney, New South Wales, Australia

Field Service Technician - Sydney, Australia - Permanent ContractOur client is a global lifting‑solutions manufacturer with multiple sites worldwide. They produce mobile hydraulic cranes, crawler cranes, boom trucks, and tower cranes, and are known for durable, high‑quality engineering across multiple sectors.They are looking for a Field Service Technician to help support a project based in Dublin.What you'll do: Diagnose and resolve warranty-related issues that fall outside the capabilities or responsibilities of the distributor or customer.Organise and oversee activities related to investigating and addressing customer‑reported technical issues, applying the appropriate processes to prevent similar operational or service challenges in the future.Review and assess technical problem reports to identify trends that may impact future design, manufacturing, service, or maintenance practices, and recommend improvements to mitigate recurring issues. What you'll need: Extensive technical service and support experience, ideally within the crane industry or the broader heavy equipment sector.Capable of interpreting and working with electronic and hydraulic schematics.Demonstrates strong analytical skills in evaluating technical issue reports, research results, and system or process outputs.Experience and knowledge in hybrid vehicle systems are considered an asset.Experience and knowledge in automotive electrical systems are considered an asset. If this role is of interest, apply now!#LI-JR1

I have always received a highly professional & personable service from Caroline
I have always received a highly professional & personable service from Caroline and the team at QCS. They listen carefully to the specific requirements of available roles and work tirelessly to supply a pool of potential candidates and make the hiring and contract renewal process an easy activity to manage
Caroline O'Sullivan
Caroline O'Sullivan

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