Office Administrator

Office Administrator

at

Supercritical

Learn more about us at www.supercritical.solutions

OverviewAs the heartbeat of our workplace, the Office Administrator plays a pivotal role in creating a seamless, welcoming, and high-performing environment for our team and visitors alike. This is more than just a facilities role — it''s about shaping the everyday experience of our people. From overseeing essential services and managing trusted suppliers to resolving IT issues and ensuring our space runs smoothly, you''ll be the go-to person who keeps everything connected and functioning with care and precision.

You''ll champion a workspace that''s operationally excellent, energising, and inclusive, supporting team events, onboarding new joiners, and making every guest feel like a VIP. If you''re a natural organiser with a proactive mindset and a passion for continuous improvement, this is your opportunity to make a real impact at the heart of our organisation.

You will join an exciting and fast-moving company that is intent on disrupting the energy industry and enabling a net-zero future.

Job Details

Location

- Supercritical HQ, West London, UK

Type

- Permanent / Part-time dependent on applicant preference

Salary

- £40,000 - £47,500 per annum (Experience Dependant). Part-time pro-rated for reduced hours

Equity

- All new full-time employees are invited to join our tax-efficient

share scheme

Holiday

- 25 days + birthday off + public holidays (pro-rated for part-time)

What you’ll doOffice and Facilities Administration

Oversee day-to-day facility operations, including maintenance, utilities, and resolving property-related issues (e.g. leaks, Wi-Fi, AV systems).

Manage building security, including fire alarm tests, access cards, and alarm systems.

Coordinate with key service providers (e.g. cleaners, PAT testing, window cleaners) and suppliers, handling sourcing, contracts, and quality control.

People and Culture

Provide a warm and professional welcome to guests, maintaining a presentable reception area and coordinating refreshments for special visits.

Play a key role in HR support, assisting with onboarding, scheduling, practical setup, and organizing team events and away days.

Set and manage principles for facility use, including hot desk etiquette, team day planning, car charging, and cleanliness standards.

Admin and Coordination

Support staff admin, including managing the holiday calendar, organizing travel and accommodation, and maintaining up-to-date emergency contact info.

Act as the main point of contact for our external IT support provider, ensuring timely and effective tech issue resolution.

Coordinate complex travel and logistics activities, serving as a trusted go-to for key actions.

About youIdeally, you will:

Proven experience in office, operations or facilities management, including oversight of building services, suppliers, and workspace operations.

Strong organisational and problem-solving skills, able to manage multiple responsibilities and respond quickly to issues.

Excellent communication and interpersonal skills. You will be confident working with internal teams, external suppliers, and guests.

Experience liaising with service providers and managing contracts such as cleaners, IT support, and AV services.

Confidence with basic IT and office technology (e.g. Wi-Fi, AV systems, Microsoft Office/Google Workspace).

Discretion and professionalism in handling sensitive staff information (e.g. emergency contacts, onboarding details).

A proactive and hands-on approach, anticipating needs and taking ownership of improvements.

Good understanding of basic health and safety and building security protocols.

Skills that are desirable

Previous experience working with external IT support providers

Experience managing travel and accommodation bookings for staff

Familiarity with HR administrative processes (e.g. onboarding, holiday tracking, maintaining staff records)

Event or team day coordination experience

Basic understanding of lease agreements or property compliance issues (e.g. chemicals, landlord liaison)

First aid or fire marshal certification

Seniority level

Entry level

Employment type

Permanent / Part-time dependent on applicant preference

Job function

Administrative

Industries

Renewable Energy Equipment Manufacturing

We are committed to finding the best candidates and encourage you to apply even if you don''t meet all the requirements. Your unique skills and experiences may be exactly what we''re looking for. We value trust and transparency.

Supercritical is proud to foster an inclusive environment. We believe diversity drives innovation and we ensure that every team member feels welcomed, valued, and empowered to succeed. We encourage applicants of all genders, ethnicities, backgrounds, and abilities to apply and help shape the future of clean energy.

Benefits

Flexibility and Balance: Flexible start and finish times; flexible on home working; flexible on working abroad.

Parental Leave Policy - 3 months full pay for mothers and fathers

Growth Opportunities - wide range of exposure and development

Support for Training and Accreditation - professional fee coverage

Monthly Team Days and Lunch Outings

Option to buy 5 extra holidays

Birthdays off!

Team Milestone Celebrations

Pension - 3% employee contribution + 5% employer contribution

Referral bonuses

Part-time notice: If you are applying for a part-time role, please be sure to state this in any covering letter or on your CV when you apply.

Additional notesLearn more about us at ..... full job details .....