Office manager jobs in London

Location: Horsham, West Sussex
Hours: Part-time, 12 to 16 hours per week
Contract: Temporary, 2 months
Pay: £20 per hour (+ holiday)
Start Date: ASAP

Prospectus is delighted to be supporting our client, the UK’s only charitable organisation dedicated to supporting and promoting the interests of professional proprietors of equestrian establishments, in their search for a temporary PA / Office Manager.

This is a fantastic opportunity for an experienced administrator to join a small, friendly charity and play a key role in supporting its members, trustees, and daily operations. The successful candidate will be highly organised, proactive, and confident managing a broad range of office and membership administration responsibilities.
Responsibilities

• Act as the first point of contact for members and stakeholders, handling enquiries via telephone and email.
• Manage the office inbox and ensure correspondence is dealt with promptly and professionally.
• Support membership administration, including processing new memberships, updating member records, and maintaining accurate databases.
• Coordinate safeguarding course bookings and issue certificates to participants.
• Prepare, send, and maintain records of membership and course-related certificates.
• Update Excel spreadsheets, CRM systems, and internal records to ensure accurate reporting and administration.
• Provide administrative support to trustees, including diary coordination and assistance with ad hoc tasks.
• Undertake general office administration, including filing, scanning, printing, post management, and document preparation.
• Help maintain efficient office systems and processes that support the smooth running of the organisation.

Requirements

• Proven experience in an administrative, office management, or PA position.
• Strong working knowledge of Microsoft Office, particularly Excel and Word.
• Excellent organisational skills with strong attention to detail and the ability to manage multiple priorities.
• Confident communicator with excellent written and verbal communication skills.
• Able to work effectively both independently and as part of a small team.
• Experience working with CRM systems and databases would be advantageous.
• Experience using Xero would be beneficial but is not essential.
• A full driving licence and access to a vehicle is required due to the office location.

This is an excellent opportunity to join a well-respected membership charity and contribute to the delivery of an essential service supporting the equestrian sector.

At Prospectus, we are committed to supporting you throughout your application journey. We welcome applicants from all backgrounds and do not discriminate based on age, gender, disability, race, religion, sexual orientation, marital status, or pregnancy/maternity.

Office Manager

An exciting opportunity has arisen to join PETA as our Office Manager. We are seeking an organised, proactive, and enthusiastic individual to oversee the day-to-day operations of our London office and help create an exceptional workplace experience for our colleagues. You will work autonomously to ensure that our office runs efficiently, support colleagues across multiple departments, and contribute to a positive and collaborative culture that helps advance PETA's mission.

Position Objective:

• To efficiently manage PETA’s office operations by providing day-to-day support.
• To be the main point of contact for all operational matters.

Term of Employment:

Full-time, permanent

Reports To:

Senior HR Manager

Salary:

£32,000 - £35,000

Location:

Hybrid in London (must be able to work three days a week from the London office)

Primary Responsibilities and Duties:

• Managing the administrative and operational needs of the office and its staff
• Submitting invoices for payment, assisting colleagues with the submission of expense requests, and managing petty cash
• Ensuring cost-efficiency of all office-related expenses
• Liaising with vendors, suppliers, couriers, and contractors to ensure the smooth delivery of the organisation’s operational needs
• Working with FSAP’s IT team to ensure that all technological equipment is properly maintained and working correctly
• Onboarding new employees, including ensuring new starters receive the necessary IT equipment
• Keeping the office tidy, organised, and running efficiently and smoothly
• Overseeing PETA’s offsite storage unit, liaising with other departments as needed
• Ordering supplies for the office and its facilities
• Coordinating events and employee engagement activities
• Acting as the first point of contact for visitors to the office and for all office-related queries
• Managing, reviewing, and streamlining operational procedures
• Ensuring health and safety compliance in the office and offsite unit by regularly conducting risk assessments, addressing risks identified, and taking preventative action to prevent accidents and incidents
• Providing administrative support to HR and other departments, as needed
• Performing any other duties assigned by the supervisor

Qualifications:

• Experience in a similar role
• Previous administration experience
• Ability to work independently
• Ability to manage various tasks and projects simultaneously
• Excellent attention to detail
• Ability to work well under pressure and meet deadlines
• Excellent organisational and interpersonal skills
• Exceptional communication skills, both written and verbal
• A strong commitment to the objectives of the organisation
• Adherence to a vegan lifestyle is strongly preferred

About the Constitution Society

The Constitution Society is an independent educational foundation founded in 2009. 

We promote public understanding of the UK constitution and work to encourage informed debate between legislators, academics and the public about proposals for constitutional change. We advocate the maintenance of basic constitutional standards and a considered approach to constitutional change. Where such change is required, we argue for the careful preparation of legislation, with broad consultation and adequate time for scrutiny and debate. 

The Constitution Society is a registered charity. We are entirely independent, with no connection to any political party. We rely for our funding on individual donations and grants from educational trusts and foundations.

The Role

We are seeking an organised, proactive and dependable Office Manager to help ensure the smooth running of the Constitution Society. Working closely with the executive team, you will play a central role in the day-to-day administration of the charity. This is a varied position combining office management, executive support, governance administration, financial administration, communications and event management. The successful candidate will be highly organised, comfortable working independently and able to manage a varied workload within a small, friendly organisation.

Key Responsibilities

Office and Operations

• Manage the day-to-day operation of the Society's Westminster office.
• Maintain office systems, filing and organisational records.
• Identify opportunities to improve office procedures and administrative systems.

Executive and Governance Support

• Provide executive support to the Directors, including diary management, meeting scheduling and travel arrangements.
• Assisting in managing Society correspondence and general enquiries.
• Organising trustee meetings, staff meetings and the Annual General Meeting, including preparing and circulating papers and minutes.
• Maintain governance records and organisational policies.
• Assist with Charity Commission and Companies House compliance and statutory filings.
• Monitor governance deadlines and ensure key organisational records remain up to date.

Finance Administration

• Process invoices, expenses and purchase orders.
• Maintain financial records and reconcile routine expenditure.
• Liaise with the Society's accountants and external auditors.
• Support the preparation of budgets and financial reports.
• Administer contractor payments. 
• Monitor subscriptions, memberships and regular payments.

Communications and Digital Engagement

• Manage the Society's social media channels, including LinkedIn, YouTube and Bluesky.
• Schedule and publish content promoting the Society's research, publications, events and media appearances.
• Help grow the Society's online audience through engaging digital content.
• Monitor social media performance and prepare basic analytics reports.
• Assist with maintaining the Society's website and email mailing lists.

Events

• Assist with organising seminars, conferences, lectures and receptions.
• Coordinate invitations, registrations and event logistics.
• Book venues and liaise with suppliers.
• Support publication launches and other public events.

Person Specification

Essential

• At least two years' experience in an office management, executive assistant, operations or senior administrative role.
• Excellent organisational skills with exceptional attention to detail.
• Experience organising meetings, preparing agendas and taking accurate minutes.
• Experience of financial administration, including processing invoices and maintaining financial records.
• Experience managing or contributing to organisational social media accounts.
• Excellent written and verbal communication skills.
• Excellent IT skills, including Microsoft Office (particularly Outlook, Word and Excel) and familiarity with cloud-based collaboration tools.
• The ability to work independently, prioritise competing demands and manage multiple projects simultaneously.
• The ability to handle confidential information with discretion and professionalism.

Desirable

• Experience working in the charity, education, public policy or not-for-profit sectors.
• Experience supporting trustee boards or senior leadership teams.
• Experience organising public events or conferences.
• Experience using WordPress or another website content management system.
• Experience using email marketing platforms such as Mailchimp or YMLP.
• A degree or equivalent professional qualification, or comparable relevant experience.

What We Offer

The Constitution Society is a small organisation where every member of staff makes a significant contribution to our work. This is an opportunity to join a respected educational charity at the centre of debates about the UK constitution, working with leading academics, policymakers and public figures.

The Constitution Society is committed to equality of opportunity and welcomes applications from candidates of all backgrounds.

How to Apply
Please upload a combined cover letter (one page maximum), CV (two pages maximum). These should be uploaded in a single PDF or Word document. Use your full name as the file title: i.e. "John Smith".

Closing date: 31 July 2026.

Interviews will be held in Westminster week commencing 10 August 2026.

We’re an award-winning charity running local learning centres in the heart of the communities where the young people we support live. Our centres provide a high-impact education programme which includes practical learning support, pastoral care, and motivational and confidence-building activities for young people aged 7-18. Our aim is to enable students from the least advantaged neighbourhoods to realise their ambitions and achieve their wonderful potential.

As the UK’s leading university access organisation, our staff team is helping over 60,000 young people each year at its 46 learning centres across England and Scotland, and we plan to scale-up our provision over the coming years.

We are looking for a high-calibre candidate to join as Office Manager and Executive Assistant. You will be the main point of contact for our Senior Management Team, Trustee Board and Advisory Panel members and have the inside track on how the charity plans and implements both its strategic growth and its day-to-day operations. You will also act as Office Manager in our Head Office, and be part of our Facilities Team supporting our sites across the network.

The role is challenging and varied. You will work with a wide range of our stakeholders, both internally and externally, taking a professional yet friendly approach – you will have strong interpersonal and communication skills. You will have excellent organisational and analytical skills and be able to demonstrate meticulous attention to detail, excellent written skills and will be highly efficient. You will need to be able to gain the respect required to act as the voice of the CEO.

The role at a glance

Contract: Part-time (30 hours per week), permanent

Start date: September 2026 (or as otherwise agreed with candidate)

Working hours:

30 hours per week (typically 4 days per week, 09:00 to 17:30, but alternate patterns can be discussed with candidates)

We are a delivery organisation providing frontline educational services for young people. Our Head Office team is based on the site of our North Kensington centre in West London. We are an organisation with team members at different stages of their career, including many in their first roles: we are committed to nurturing talent and providing a developmental culture for all. 

Role is mainly office-based, with the opportunity to work from home one day per week.

Salary: £40,000 per annum pro rata (including £2,800 London contribution)
Pro-rated salary for 30 hours per week (0.8 FTE) is £32,000 per annum

Location: IntoUniversity Head Office, 95 Sirdar Road, London W11 4EQ

Annual leave: 

Full-time staff entitlement, pro-rated for part-time staff:
33 days (inc bank & public holidays) 
+ 3 closure days (two in December and one in July) 
+ additional length of service entitlement
(one day per year of service, up to 5 days)

Application deadline: 9am Monday 27th July 2026