Senior Office Manager / Operations Manager
Job Description
About The ON Services Group
\nThe ON Services Group is a growing and ambitious business delivering specialist IT support,
\ninfrastructure, and managed technology solutions to clients across multiple sectors. We pride
\nourselves on building long-term relationships through reliability, responsiveness, and high-quality
\nservice delivery.
\nAs the business continues to grow, we are investing in the internal structure, systems, and people
\nneeded to scale effectively. This role is central to that journey.
\nWe are seeking a highly capable Senior Office Manager with strong operational and people
\nmanagement experience to oversee the day-to-day running of the business, support strategic
\ngrowth, and ensure operational excellence across administrative, commercial, and internal business
\nfunctions.
\n\nThe Role
\nThis is a senior, hands-on role with broad operational responsibility and real influence across the
\nbusiness. Reporting directly to senior leadership, you will act as the operational backbone of the
\ncompany — ensuring that internal processes, administration, people management, and business
\noperations run efficiently and professionally.
\nYou will lead office operations, support commercial activities, manage key internal processes, and
\ntake ownership of operational decision-making to help the business scale effectively while
\nmaintaining excellent service standards.
\nThis role would suit an experienced Office Manager, Operations Coordinator, or Business Support
\nManager looking to take the next step into a more commercially and operationally focused
\nleadership position.
\n\nKey Responsibilities
\nOffice & Business Operations
\nOversee the day-to-day running of office and administrative operations across the business
\nEnsure internal systems, processes, and workflows operate efficiently and consistently
\nIdentify and implement operational improvements to support business growth and scalability
\nMaintain office facilities, equipment, suppliers, and service contracts
\nEnsure accurate document management, filing systems, and business records are maintained
\nSupport senior leadership with operational planning and business coordination
\n\nOperational & Commercial Support
\nSupport the delivery and coordination of projects, resources, and operational schedules
\nManage client communications and ensure high levels of customer service
\nSupport commercial activities including quotations, proposals, reporting, and contract
\nadministration
\nWork closely with leadership to monitor operational performance and business priorities
\nAssist with supplier management and external stakeholder relationships
\nCoordinate internal meetings, reporting, and action tracking
\n\nFinance & Administration
\nOversee invoicing, purchase ledger administration, expense management, and financial
\nrecord keeping
\nSupport budgeting, forecasting, and financial reporting processes
\nLiaise with external accountants and finance providers
\nMonitor operational costs and support commercial decision-making through accurate
\nadministration and reporting
\nEnsure payroll administration inputs are accurate and submitted on time
\n\nHR & People Management
\nLead and oversee HR administration processes including recruitment coordination,
\non-boarding, absence tracking, training records, and employee documentation
\nSupport managers with employee relations, performance management, and people
\nprocesses
\nHelp foster a positive, professional, and high-performing workplace culture
\nEnsure company policies and procedures remain compliant and up to date
\nSupport staff development and training initiatives
\n\nLeadership & Decision-Making Responsibilities
\nTake ownership of operational decision-making within the office and administrative
\nfunctions
\nManage priorities across multiple departments and ensure accountability for delivery
\nAct as a trusted point of escalation for operational and administrative matters
\nSupport strategic business initiatives and continuous improvement projects
\nProvide regular operational updates and management reporting to leadership
\nContribute to planning discussions and business improvement initiatives
\n\nAbout You
\nWe are looking for an experienced, proactive, and commercially aware professional who thrives in a
\nfast-paced SME environment and enjoys taking ownership.
\nYou will be highly organised, solutions-focused, and confident managing both operational
\nresponsibilities and people-related matters.
\nEssential Skills & Experience
\nProven experience in a senior office management, operations, or business support role
\nPrevious experience with managerial responsibility and operational decision-making
\nStrong organisational and multitasking abilities
\nExcellent communication and stakeholder management skills
\nStrong administration and operational coordination experience
\nExperience overseeing finance administration processes including invoicing, budgeting
\nsupport, and reporting
\nStrong IT skills including Microsoft Office (Word, Excel, Outlook, Teams)
\nAbility to manage competing priorities and work autonomously
\nProactive and solutions-oriented mindset
\nDesirable
\nExperience within IT services, technology, engineering, construction, or technical service
\nenvironments
\nExperience with CRM, ERP, or project management systems
\nHR or people management experience
\nFamiliarity with operational KPI reporting and process improvement initiatives
\nExperience supporting senior leadership teams
\n\nWhat We Offer
\nCompetitive salary (£40,000 – £48,000 depending on experience)
\nCompany pension scheme
\n20 days annual leave plus bank holidays
\nOngoing training and professional development
\n\nOpportunity to play a key role within a growing and ambitious business
\nSupportive and collaborative working environment
\nGenuine opportunity to influence business operations and growth
\n\nAdditional Information
\nApplicants must have the right to work in the UK.
\n\nThis is an excellent opportunity for an experienced operational professional seeking a pivotal role
\nwithin a growing business where their contribution will have genuine impact and visibility.
