UK Health Security Agency

Senior Toxicologist

The closing date is 04 December 2025

Job summary

The Radiation, Chemical, Climate and Environmental Hazards Directorate (RCCE) provides evidence and advice to protect health from Radiation, Chemical, Climate and Environmental Hazards. To support evidence-anchored advice for Health Security, RCCE undertakes research work with various university partners and other organisations including within Health Protection Research Units (HPRUs) supported by the National Institutes of Health Research (NIHR).

The Toxicology Department provides public health advice to other parts of RCCE, the Department of Health and Social Care and other government departments and agencies, Local Authorities and other stakeholders including members of the public on the risks to health from environmental hazards (chemicals, particles and bioaerosols). The Toxicology Department undertakes research that underpins chemical regulation and policy development. All of the research underpins the UKHSA role in public health protection from environmental hazards.

Main duties of the job

General Toxicology and Biomonitoring Programme

The General Toxicology and Biomonitoring Programme is within the Toxicology Department. It consists of toxicologists, who provide public health advice on a variety of different chemicals to colleagues within UKHSA, Government agencies and departments, and to the public. This advice focuses on the health effects of chemicals in water, soil and waste processes. We also advise on the public health aspects of the approval and use of pesticides, veterinary medicines, cosmetics and consumer products. The Group provides the Secretariat, jointly with the Food Standards Agency, for three important Government expert advisory committees: the Committees on the Toxicity, Carcinogenicity and Mutagenicity of Chemicals in Food, Consumer Products and the Environment (COT, COC and COM). The Group has an active biomonitoring research programme.

About us

We pride ourselves as being an employer of choice, where Everyone Matters promoting equality of opportunity to actively encourage applications from everyone, including groups currently underrepresented in our workforce.

UKHSA ethos is to be an inclusive organisation for all our staff and stakeholders. To create, nurture and sustain an inclusive culture, where differences drive innovative solutions to meet the needs of our workforce and wider communities. We do this through celebrating and protecting differences by removing barriers and promoting equity and equality of opportunity for all.

Please visit our careers site for more information https://gov.uk/ukhsa/careers

Details

Date posted

06 November 2025

Pay scheme

Other

Salary

£44,148 to £50,121 a year per annum, pro rata

Contract

Permanent

Working pattern

Full-time, Part-time, Job share, Flexible working

Reference number

919-LT-302688-EXT

Job locations

Core HQ

Chilton (Didcot)

OX11 0RQ


Job description

Job responsibilities

  • To critically assess toxicity data on chemicals
  • To provide advice on the health effects and risk assessments of chemicals in drinking water, land and waste processes, and communicate this advice in a manner appropriate to the recipient
  • To provide advice on the public health impacts of chemical regulation in collaboration with UK Government departments
  • To provide advice on the use of human biomonitoring in public health protection
  • To contribute to the development of the scientific content for the UKHSA Compendium of Chemical Hazards and a public-facing website to provide information in the potential health risks from chemicals.
  • To contribute to the General Toxicology and Biomonitoring Programmes advice to Government Departments and Agencies on contamination of land and water, and from waste processes
Other
  • To support the work of the Government independent expert advisory committees, where relevant to the work of the Group.
The job entails working within the General Toxicology and Biomonitoring programme to provide advice on the health effects of chemicals in drinking water, contaminated land and from waste processes. The team works closely with the regional RCCE chemicals teams in England and Wales, providing advice and support during contamination incidents involving chemicals. The post holder will get the opportunity to input in various aspects of the groups work and provide toxicological advice as necessary to support the work of UKHSA. They will also be required to have toxicological experience in chemical risk assessment, national chemicals regulation or human biomonitoring, to develop advice in these areas as necessary to support the work of UKHSA. Management Duties:
  • To manage members of staff as necessary, monitoring their performance and undertaking their appraisal.
  • Manages research contracts and projects undertaken by the group, department and RCCE.
  • Under emergency situations, manage the delivery of expert advice in a timely manner.

Training Duties:

  • To be responsible for on-going training of staff.
  • To supervise on-the-job training of staff.
  • To assist in the training of other UKHSA staff and external staff.

The above is only an outline of the tasks, responsibilities and outcomes required of the role. You will carry out any other duties as may reasonably be required by the directorate.

Essential Criteria:

  • Masters qualification (or equivalent) relevant to the field of toxicology and/or equivalent experience of working at a similar level in a relevant toxicology area
  • Knowledge and practical experience of chemical risk assessment, or regulatory toxicology, or exposure science and human biomonitoring
  • Awareness of broad public health and environmental issues
  • Experience of managing, mentoring, or training
  • Good scientific report writing and presentation skills; capable of constructing and delivering clear ideas and concepts concisely and accurately for diverse audiences.
  • Ability to establish good working relationships
  • Ability to meet deadlines, and plan work over short, medium and long-term timeframes
  • Self-reliant and self-motivating
  • Ability to critically assess literature data and other information relevant to assessing the toxicity of chemicals.
  • An understanding of and commitment to equality of opportunity and good working relationships.

Desirable Criteria:

  • Relevant detailed specialist knowledge
  • Inclusion in UK Register of Toxicologists
  • Experience in public health or industry
  • Skills for nurturing key relationships and maintaining networks.
  • Able to handle difficult situations
  • Able to deal with media enquiries

Selection Process Details:

This vacancy will be assessed using a competency-based framework which will assess your qualifications, knowledge and experience and/or skills and abilities outlined in the essential criteria.

Stage 1: Application & Sift

Competency-based

You will be required to complete an application form. You will be assessed on the listed 10 essential criteria, and this will be in the form of a:

  • Application form (Employer/ Activity history section on the application)
  • 1000 word supporting statement.

This should outline how your skills, experience, and knowledge, provide evidence of your suitability for the role, with reference to the essential criteria.

The Application form and supporting statement will be marked together.

Longlisting: In the event of a large number of applications we may longlist into 3 piles of:

  • Meets all essential criteria
  • Meets some essential criteria
  • Meets no essential criteria

If longlisting is used, the pile meets all essential criteria and meets some essential criteria will proceed to shortlisting.

Shortlisting: In the event of a large number of applications we may complete an initial sift on the lead criteria of:

  • Masters qualification (or equivalent) relevant to the field of toxicology and/or equivalent experience of working at a similar level in a relevant toxicology area
  • Knowledge and practical experience of chemical risk assessment, or regulatory toxicology, or exposure science and human biomonitoring

Desirable criteria may be used in the event of a large number of applications/large amount of successful candidates.

If you are successful at this stage, you will progress to interview & assessment.Please do not exceed 1000 words. We will not consider any words over and above this number.

Feedback will not be provided at this stage.

Stage 2: Interview

Competency based

You will be invited to a single face to face interview.

Knowledge, experience, skills & abilities will be tested at interview

You will be asked to prepare and present a 10 minute presentation at the start of your interview. The subject of this will be sent to those candidates invited to interview.

Interview dates to be confirmed.

Once this job has closed, the job advert will no longer be available. You may want to save a copy for your records.

Selection Process

Please note you will not be able to upload your CV. You must complete the application form in as much detail as possible. Please do not email us your CV.

Location

This role is being offered as hybrid working based at our Scientific Campus in Chilton (Didcot). We offer great flexible working opportunities at UKHSA and operate using a hybrid working model where business needs allow. This provides us with greater flexibility about how and where we work, to get the best from our workforce. As a hybrid worker, you will be expected to spend a minimum of 60% of your contractual working hours (approximately 3 days a week prorata, averaged over a month) based at Chilton (Didcot).

Security Clearance Level Requirement

Successful candidates must pass a disclosure and barring security check.

If based at one of our scientific campuses, you will be required to have a minimum of a Counter Terrorism Check security vetting check as a minimum. For meaningful National Security Vetting checks to be carried out individuals need to have lived in the UK for a sufficient period of time. You should normally have been resident in the United Kingdom for the last 3 years as the role requires Counter Terrorism Check (CTC) clearance. In exceptional circumstances UK residency less than the outlined periods may not necessarily bar you from gaining national security vetting and applicants should contact the Vacancy Holder/Recruiting Manager listed in the advert for further advice.

Eligibility Criteria

External: Open to all external applicants (anyone) from outside the Civil Service (including internal applicants).

Face to Face Interviews

In exceptional circumstances, we may be able to offer a remote interview.Salary Information

If you are successful at interview, and are moving from another government department, NHS, or Local Authority, the relevant starting salary principles for level transfers or promotions will apply. Otherwise, roles are offered at the pay scale minimum for the grade, but in exceptional circumstances there may be flexibility if you are able to demonstrate you are already in receipt of an existing, higher salary. Pay increases are through the relevant annual pay award for the role and terms.

Job description

Job responsibilities

  • To critically assess toxicity data on chemicals
  • To provide advice on the health effects and risk assessments of chemicals in drinking water, land and waste processes, and communicate this advice in a manner appropriate to the recipient
  • To provide advice on the public health impacts of chemical regulation in collaboration with UK Government departments
  • To provide advice on the use of human biomonitoring in public health protection
  • To contribute to the development of the scientific content for the UKHSA Compendium of Chemical Hazards and a public-facing website to provide information in the potential health risks from chemicals.
  • To contribute to the General Toxicology and Biomonitoring Programmes advice to Government Departments and Agencies on contamination of land and water, and from waste processes
Other
  • To support the work of the Government independent expert advisory committees, where relevant to the work of the Group.
The job entails working within the General Toxicology and Biomonitoring programme to provide advice on the health effects of chemicals in drinking water, contaminated land and from waste processes. The team works closely with the regional RCCE chemicals teams in England and Wales, providing advice and support during contamination incidents involving chemicals. The post holder will get the opportunity to input in various aspects of the groups work and provide toxicological advice as necessary to support the work of UKHSA. They will also be required to have toxicological experience in chemical risk assessment, national chemicals regulation or human biomonitoring, to develop advice in these areas as necessary to support the work of UKHSA. Management Duties:
  • To manage members of staff as necessary, monitoring their performance and undertaking their appraisal.
  • Manages research contracts and projects undertaken by the group, department and RCCE.
  • Under emergency situations, manage the delivery of expert advice in a timely manner.

Training Duties:

  • To be responsible for on-going training of staff.
  • To supervise on-the-job training of staff.
  • To assist in the training of other UKHSA staff and external staff.

The above is only an outline of the tasks, responsibilities and outcomes required of the role. You will carry out any other duties as may reasonably be required by the directorate.

Essential Criteria:

  • Masters qualification (or equivalent) relevant to the field of toxicology and/or equivalent experience of working at a similar level in a relevant toxicology area
  • Knowledge and practical experience of chemical risk assessment, or regulatory toxicology, or exposure science and human biomonitoring
  • Awareness of broad public health and environmental issues
  • Experience of managing, mentoring, or training
  • Good scientific report writing and presentation skills; capable of constructing and delivering clear ideas and concepts concisely and accurately for diverse audiences.
  • Ability to establish good working relationships
  • Ability to meet deadlines, and plan work over short, medium and long-term timeframes
  • Self-reliant and self-motivating
  • Ability to critically assess literature data and other information relevant to assessing the toxicity of chemicals.
  • An understanding of and commitment to equality of opportunity and good working relationships.

Desirable Criteria:

  • Relevant detailed specialist knowledge
  • Inclusion in UK Register of Toxicologists
  • Experience in public health or industry
  • Skills for nurturing key relationships and maintaining networks.
  • Able to handle difficult situations
  • Able to deal with media enquiries

Selection Process Details:

This vacancy will be assessed using a competency-based framework which will assess your qualifications, knowledge and experience and/or skills and abilities outlined in the essential criteria.

Stage 1: Application & Sift

Competency-based

You will be required to complete an application form. You will be assessed on the listed 10 essential criteria, and this will be in the form of a:

  • Application form (Employer/ Activity history section on the application)
  • 1000 word supporting statement.

This should outline how your skills, experience, and knowledge, provide evidence of your suitability for the role, with reference to the essential criteria.

The Application form and supporting statement will be marked together.

Longlisting: In the event of a large number of applications we may longlist into 3 piles of:

  • Meets all essential criteria
  • Meets some essential criteria
  • Meets no essential criteria

If longlisting is used, the pile meets all essential criteria and meets some essential criteria will proceed to shortlisting.

Shortlisting: In the event of a large number of applications we may complete an initial sift on the lead criteria of:

  • Masters qualification (or equivalent) relevant to the field of toxicology and/or equivalent experience of working at a similar level in a relevant toxicology area
  • Knowledge and practical experience of chemical risk assessment, or regulatory toxicology, or exposure science and human biomonitoring

Desirable criteria may be used in the event of a large number of applications/large amount of successful candidates.

If you are successful at this stage, you will progress to interview & assessment.Please do not exceed 1000 words. We will not consider any words over and above this number.

Feedback will not be provided at this stage.

Stage 2: Interview

Competency based

You will be invited to a single face to face interview.

Knowledge, experience, skills & abilities will be tested at interview

You will be asked to prepare and present a 10 minute presentation at the start of your interview. The subject of this will be sent to those candidates invited to interview.

Interview dates to be confirmed.

Once this job has closed, the job advert will no longer be available. You may want to save a copy for your records.

Selection Process

Please note you will not be able to upload your CV. You must complete the application form in as much detail as possible. Please do not email us your CV.

Location

This role is being offered as hybrid working based at our Scientific Campus in Chilton (Didcot). We offer great flexible working opportunities at UKHSA and operate using a hybrid working model where business needs allow. This provides us with greater flexibility about how and where we work, to get the best from our workforce. As a hybrid worker, you will be expected to spend a minimum of 60% of your contractual working hours (approximately 3 days a week prorata, averaged over a month) based at Chilton (Didcot).

Security Clearance Level Requirement

Successful candidates must pass a disclosure and barring security check.

If based at one of our scientific campuses, you will be required to have a minimum of a Counter Terrorism Check security vetting check as a minimum. For meaningful National Security Vetting checks to be carried out individuals need to have lived in the UK for a sufficient period of time. You should normally have been resident in the United Kingdom for the last 3 years as the role requires Counter Terrorism Check (CTC) clearance. In exceptional circumstances UK residency less than the outlined periods may not necessarily bar you from gaining national security vetting and applicants should contact the Vacancy Holder/Recruiting Manager listed in the advert for further advice.

Eligibility Criteria

External: Open to all external applicants (anyone) from outside the Civil Service (including internal applicants).

Face to Face Interviews

In exceptional circumstances, we may be able to offer a remote interview.Salary Information

If you are successful at interview, and are moving from another government department, NHS, or Local Authority, the relevant starting salary principles for level transfers or promotions will apply. Otherwise, roles are offered at the pay scale minimum for the grade, but in exceptional circumstances there may be flexibility if you are able to demonstrate you are already in receipt of an existing, higher salary. Pay increases are through the relevant annual pay award for the role and terms.

Person Specification

Application form and supporting statement

Essential

  • Application form and supporting statement

Interview

Essential

  • Questions on knowledge, experience, skills and abilities.
  • Presentation
Person Specification

Application form and supporting statement

Essential

  • Application form and supporting statement

Interview

Essential

  • Questions on knowledge, experience, skills and abilities.
  • Presentation

Disclosure and Barring Service Check

This post is subject to the Rehabilitation of Offenders Act (Exceptions Order) 1975 and as such it will be necessary for a submission for Disclosure to be made to the Disclosure and Barring Service (formerly known as CRB) to check for any previous criminal convictions.

Certificate of Sponsorship

Applications from job seekers who require current Skilled worker sponsorship to work in the UK are welcome and will be considered alongside all other applications. For further information visit the UK Visas and Immigration website (Opens in a new tab).

From 6 April 2017, skilled worker applicants, applying for entry clearance into the UK, have had to present a criminal record certificate from each country they have resided continuously or cumulatively for 12 months or more in the past 10 years. Adult dependants (over 18 years old) are also subject to this requirement. Guidance can be found here Criminal records checks for overseas applicants (Opens in a new tab).

Additional information

Disclosure and Barring Service Check

This post is subject to the Rehabilitation of Offenders Act (Exceptions Order) 1975 and as such it will be necessary for a submission for Disclosure to be made to the Disclosure and Barring Service (formerly known as CRB) to check for any previous criminal convictions.

Certificate of Sponsorship

Applications from job seekers who require current Skilled worker sponsorship to work in the UK are welcome and will be considered alongside all other applications. For further information visit the UK Visas and Immigration website (Opens in a new tab).

From 6 April 2017, skilled worker applicants, applying for entry clearance into the UK, have had to present a criminal record certificate from each country they have resided continuously or cumulatively for 12 months or more in the past 10 years. Adult dependants (over 18 years old) are also subject to this requirement. Guidance can be found here Criminal records checks for overseas applicants (Opens in a new tab).

Employer details

Employer name

UK Health Security Agency

Address

Core HQ

Chilton (Didcot)

OX11 0RQ


Employer's website

https://www.gov.uk/government/organisations/uk-health-security-agency (Opens in a new tab)

Employer details

Employer name

UK Health Security Agency

Address

Core HQ

Chilton (Didcot)

OX11 0RQ


Employer's website

https://www.gov.uk/government/organisations/uk-health-security-agency (Opens in a new tab)

Employer contact details

For questions about the job, contact:

Resourcing Support Officer

Lisa Tweedie

Lisa.Tweedie@ukhsa.gov.uk

Details

Date posted

06 November 2025

Pay scheme

Other

Salary

£44,148 to £50,121 a year per annum, pro rata

Contract

Permanent

Working pattern

Full-time, Part-time, Job share, Flexible working

Reference number

919-LT-302688-EXT

Job locations

Core HQ

Chilton (Didcot)

OX11 0RQ


Supporting documents

Privacy notice

UK Health Security Agency's privacy notice (opens in a new tab)