Senior Administrator; Support Services

Salary Range: Competitive/Negotiable – dependent on skills/experience + Bonus and benefits package

Location: Office Based – Gloucester area

Hours: Monday to Friday – 08.30 to 17.30

Security Strongholdingsprovides Support Services to our wider group, which consists of two trading companies.

As a group we deliver trusted advice across a broad range of security environments, partnering with organisations to manage risk, strengthen resilience, and make informed security decisions.

We are a values-led organisation committed to Respect, Integrity, Collaboration, and Excellence, and we are proud to support a diverse and inclusive workplace.

Our teams work closely with clients to deliver value for money, thorough, high quality advisory services from strategy and design through to delivery and sign off.

This excellent opportunity is for a skilled professional to join our established team as a fulltime Senior Administrator specifically dedicated to one of our trading companies. The role sits within the Support Services Team, reporting to the Support Services Manager, working across multiple work streams.

You will play a key role in the team, collaborating with both colleagues and clients to ensure successful outcomes. The position is based in our offices near Gloucester with some travel required to attend meetings and to support business events across the country.

• Extensive experience in a senior administration, office management, or business support role.
• Experience coordinating executive diaries, meetings, travel arrangements, and office operations.
• Strong document management, record keeping, and administrative coordination skills.
• Experience supporting multiple work streams while managing competing priorities.
• Previous experience within professional services, consultancy, or security-related environments is advantageous .
• Eligibility to obtain BPSS and BS:7858 security screening .

• Support GSOC administration, including rosters, schedules, and documentation.
• Manage office enquiries, inboxes, calls, visitors, and daily operations.
• Coordinate meetings, diaries, minutes, action logs, and travel arrangements.
• Maintain records, document control, trackers, and employee onboarding.
• Support HSE activities and improve administrative processes.

• Excellent organisational skills with exceptional attention to detail.
• Strong communication skills with the ability to engage confidently at all levels.
• Ability to multitask, prioritise workloads, and consistently meet deadlines in a fast-paced environment.
• Proficient in Microsoft 365 applications including Word, Excel, Outlook, Teams, and PowerPoint.
• A proactive approach to identifying process improvements and administrative efficiencies, including AI-assisted solutions.
• Strong customer service, relationship management, and problem-solving skills.

• Work proactively and independently while effectively managing multiple priorities across different programmes .
• Build trusted relationships with colleagues, clients, suppliers, and key stakeholders.
• Maintain high standards of accuracy, professionalism, confidentiality, and customer service.
• Adapt positively to changing priorities within a fast-paced and agile business environment.
• Contribute positively to a collaborative, supportive, and high-performing team culture.

We support our people to learn, grow and thrive both personally and professionally.

Competitive salary & benefits

Learning & career progression

Funding for memberships, training & accreditations

Flexible working arrangements

Inclusive & respectful culture

Work with experienced specialists

Meaningful,…