EA and Office Manager

Reactive Technologies Limited; Greater London; Hybrid; GBP 35,000 - 52,000; Full time

Benefits offered by this job

Annual bonus

Pension scheme

Private Medical and Life Insurance

Team events

Charity days

Referral schemes

Electric car scheme

Share option scheme

Flexible working

Professional environment

Job summary

Reactive Technologies Limited is seeking a highly capable PA and Office Manager to support the CEO and Senior Leadership Team. The role combines executive assistance with hands-on office operations, ensuring a smooth and efficient high-pace environment at the London head office.

You will coordinate complex diaries, arrange domestic and international travel, and manage day‑to‑day facilities, logistics and procurement while upholding confidentiality and professional standards.

Qualifications

• Proven 5+ years in admin or executive support.
• Excellent computer skills and modern office tools.
• Strong organisational and stakeholder management abilities.
• Experience coordinating international travel and complex calendars.
• Ability to balance priorities in a fast-paced environment.
• Professional and discreet communication with leadership.

Responsibilities

• Provide proactive executive support to the CEO and Senior Leadership Team.
• Manage calendars, actions, and travel arrangements across time zones.
• Coordinate meetings, workshops, and leadership events end-to-end.
• Prepare presentations, reports and business materials as required.
• Oversee day-to-day London office operations and facilities.
• Manage budgets, procurement, and supplier relationships.
• Support HR, Finance and IT with operational initiatives.
• Assist with onboarding and employee engagement activities.

Skills

Diary management

Meeting coordination

Travel arrangements

Budget management

Communication

Tools

Outlook

Microsoft Office

Teams

Co-Pilot

Co-Work

Job description

Reactive Technologies (RTL) is a highly innovative global energy technology solution provider with the mission to unlock the potential of the global renewable energy transition.

RTL’s GridVerix ® service, formerly known as GridMetrix ® , offers unique stability measurement services to power grid operators (transmission and distribution), enabling them to control their grids more precisely and therefore operate more safely and cost-efficiently, while utilising more renewable energy in their power systems to help achieve their Net Zero targets.

RTL has more than 250+ patents granted globally, with offices in the UK, Finland, Australia, US and Middle East. To date it has achieved more than 100% revenue growth YoY and its business plan will continue this growth based on a strong global pipeline. RTL is also backed by high profile investors including, M&G, BGF, Breakthrough Energy Ventures, Eaton and Accenture.

If you are a dynamic individual with a strong track record of excellence and are passionate about playing a part in the global renewable energy transition, then you could be right for our growing team of energy industry and technology experts to help our mission of delivering low carbon energy systems globally.

The role

We are seeking a highly capable and commercially aware PA & Office Manager to join our team in a busy and varied role. The position will primarily support the CEO and five members of the Company’s Senior Leadership Team, while also taking ownership of the day-to-day management of a dynamic and active office environment, alongside a broad range of administrative and operational responsibilities.

This is an excellent opportunity for a proactive, highly organised individual with exceptional attention to detail, strong stakeholder management skills, and the ability to balance competing priorities in a fast-paced business. We are looking for someone who can provide seamless executive support, demonstrate sound commercial judgement, anticipate business needs, and contribute to the smooth and efficient running of the office.

The role offers the chance to grow with the Company, make a genuine impact, and put your own stamp on the position. In return, you’ll enjoy the flexibility of our hybrid working model and be part of a business that strongly values both professional development and a healthy work-life balance.

• Department: Administration
• Position reports into: CEO
• Location: 2-3 days a week as part of Hybrid working model, London Head Office, Bridge House, Borough, SE1 9RR
• Length of contract: Permanent and full-time

Responsibilities

EXECUTIVE ASSISTANT & LEADERSHIP SUPPORT

• Provide proactive executive support to the CEO and wider Senior Leadership Team, including diary management, meeting coordination, travel arrangements and administrative support.
• Manage complex and frequently changing calendars, ensuring priorities are balanced, actions closed and leadership time is optimised effectively.
• Manage and coordinate domestic and international travel, accommodation, visas and itineraries, ensuring seamless execution and cost-effective planning.
• Organise meetings, workshops, Board-related activities and leadership events, including scheduling across multiple time zones and managing logistics end-to-end.
• Act as a trusted partner to the Senior Leadership Team, anticipating requirements, resolving scheduling conflicts and exercising sound judgement and discretion.
• Prepare presentations, reports, meeting materials and other business documentation as required.
• Support company-wide initiatives, leadership communications and strategic projects as required.
• Manage expense submissions and corporate administration activities in line with company policies.
• Maintain the highest levels of professionalism, confidentiality and discretion when handling sensitive business and people information.

OFFICE MANAGEMENT & BUSINESS OPERATIONS

• Take ownership of the day-to-day management and smooth running of the London office, creating a professional and welcoming environment for employees and visitors.
• Act as the primary point of contact for office facilities, building management and key service providers.
• Manage relationships with suppliers, vendors and service partners, ensuring value for money and high standards of service delivery.
• Oversee office budgets, purchasing and procurement activities, demonstrating strong commercial awareness and cost management.
• Coordinate office maintenance, health and safety requirements, supplies and workplace improvements.
• Manage meeting room bookings, catering, hospitality and office events.
• Support onboarding activities including office set-up, equipment coordination and workplace readiness for new joiners.
• Welcome and assist visitors, clients and candidates attending the office.
• Manage deliveries, couriers, post and general office administration.
• Work closely with HR, Finance and IT teams to support business operations and employee experience initiatives.
• Assist with the planning and delivery of company events, offsites, leadership meetings and employee engagement activities.

What we're looking for

• At least 5 years of previous administrative or personal / executive support experience or other related professional experience
• Excellent computer skills: Proficiency in Outlook, Microsoft Office, Teams, Co-Pilot, Co-Work
• Experience with scheduling and booking international and domestic travel itineraries
• Familiarity with budget management, expense reporting
• A highly organised, efficient and strong communicator with solid interpersonal skills
• A professional and positive attitude, even while working in a fast-paced environment

Our belief is that a well-rewarded workforce with a compelling mission will result in a more engaged and productive team. As a start-up, we are agile, have a flat structure and offer a competitive benefits package:

• Annual performance-based bonus schemes
• Company pension scheme
• Private Medical and 4 x life Insurance scheme
• Regular team and company social events
• Charity Days
• Employee Referral Schemes
• Electric Car Scheme
• Company Shareoption Scheme
• Flexible working patterns to manage work life balance
• Professional and dynamic work environment

We are an equal opportunity employer. We do not discriminate on the basis of race, religion, colour, national origin, sex, gender, gender expression, sexual orientation, age, marital status, veteran status, or disability status.