Senior Project Manager vs Project Director in HV Works: Where the Line Actually Is

In HV substation and overhead line delivery, the gap between Senior Project Manager and Project Director is not a salary band or a job title. It is a specific set of commercial, technical, and leadership skills that most candidates acquire unevenly and most clients struggle to articulate in a job brief. LSP Renewables has placed project leadership across National Grid ET, SSE, AmcoGiffen, and their supply chains throughout 2025 and 2026. This is our working definition of where the line sits, drawn from live briefs and candidate assessments.

Key Takeaways

• An SPM owns the delivery of a single defined project scope: cost, programme, safety, and quality within an agreed envelope. A Project Director owns accountability across multiple projects or packages, including the commercial performance of the programme as a whole.

• The decisive differentiator in HV works is not technical depth but commercial authority: a Project Director can commit the business on variation, change, and supply chain performance without escalating to a senior executive.

• SAP or AP authorisation is a threshold requirement for most SPM roles in live HV construction. It is not, on its own, a differentiator at Project Director level - directors are expected to have held it and to understand its operational implications across a portfolio.

• NEC4 contract management and commercial close-out experience is the single most cited capability gap LSP sees in candidates who stall at SPM level and cannot clear Project Director shortlists.

• On Great Grid Upgrade framework programmes, the functional definition of Project Director includes supply chain performance management, DNO or TNO interface ownership, and in some cases P&L accountability for a delivery business unit.

What an SPM Actually Does in HV Works

A Senior Project Manager in HV substation or overhead line delivery is the primary accountability holder for a defined project. The role covers project delivery of primary and grid substation projects, driving schemes from pre-construction through to construction and commissioning, working across substations, cables, and overhead lines. The SPM manages cost, programme, safety, and quality within an agreed scope and escalates to the Project Director when issues breach the authority threshold. Indeed

In practice, a well-functioning SPM on a £10 million to £30 million HV substation project manages the following without escalation: subcontractor procurement within agreed frameworks, weekly progress reporting to the client, design coordination with the engineering team, site safety governance, and routine variation management under NEC3 or NEC4 Early Warning and Compensation Event processes. The role requires proven ability to manage project values exceeding £5 million from concept through to commissioning, strong commercial and contract management experience, and skilled client and stakeholder management, ideally alongside DNOs or TNOs. Turner Lovell

The ceiling of the SPM role is defined by what requires the Director's signature. On most EPC frameworks in the T&D sector, that ceiling sits at variation values above a defined threshold, supply chain performance notices, and client escalations involving programme impact. Candidates who consistently operate below that ceiling without pushing into it are not ready to move up. Candidates who routinely operate at it and resolve issues without escalation are. Read the full scope of transmission and distribution work for context on where HV project leadership sits within the wider grid structure.

What experience does a strong HV SPM have at promotion point?

A candidate ready to move from SPM to Project Director typically holds seven to ten years of project delivery experience, with at least three years managing projects above £10 million capital value in HV substation or overhead line environments. They have delivered at least one project from pre-construction through to energisation, including the commissioning and handback phase, without sustained Director intervention. They hold SAP or AP authorisation at 132kV or above, have operated under NEC3 or NEC4, and have personally managed at least one significant commercial close-out including disputed compensation events.

What does an SPM lack that a Project Director must have?

The gap is almost never technical. SPMs who stall at the promotion point typically lack one or more of three things: commercial authority to commit on behalf of the business, experience managing multiple concurrent projects with shared resource constraints, or the ability to hold a client relationship at senior level through a programme of work rather than a single project. The most common single gap LSP identifies in SPM-to-Director transition candidates is compensation event close-out. Many SPMs have raised Early Warnings and issued Compensation Event notices; fewer have personally closed out disputed CEs through negotiation to final settlement.

What a Project Director Does Differently

A Project Director in HV works holds accountability that an SPM does not. The Project Director role sits above the Senior Project Manager in the delivery hierarchy, with SPMs escalating to the Project Director when issues arise during the project lifecycle. On a Great Grid Upgrade framework programme, the Director typically oversees a portfolio of concurrent substation or overhead line projects delivered by a team of SPMs, manages the commercial performance of the whole portfolio against the framework contract, and owns the client relationship at programme level. Indeed

Three capabilities define the Director level in HV works and are consistently cited in shortlisting decisions by the framework contractors LSP works with.

Commercial authority. A Project Director can commit the business on programme recovery, variation settlement, and supply chain performance without Board-level sign-off for values within their delegated authority - typically £500,000 to £2 million on mid-tier framework programmes. This is not a technical skill. It is a commercial and risk judgement capability that is built through exposure to disputed claims, supply chain insolvency events, and client escalations where the Director holds the negotiating position.

Portfolio coordination. An SPM manages one project. A Project Director manages the resource, risk, and commercial dependencies across several projects simultaneously. On a live ASTI framework programme, this means holding a workforce plan across three to six substation packages, managing shared commissioning resource, and resolving programme conflicts between schemes that share DNO outage windows. This is the capability most often absent in candidates who have had strong SPM careers on single large projects but have never managed a portfolio.

Client interface at programme level. An SPM manages the client relationship on their project. A Project Director owns the relationship between the delivery business and the client organisation at framework or programme level. This includes managing client performance reviews, holding the commercial position under the framework agreement, and maintaining confidence during periods of programme stress. On SSEN, NGET, and SP Energy Networks frameworks, the Director is the nominated point of escalation for the client's programme manager - a role that requires a different communication register and risk appetite than SPM-level site interface.

How does the HV authorisation picture differ between SPM and Director level?

SAP authorisation at 132kV or above is a standard requirement for SPM roles involving live HV construction supervision. At Director level, the expectation is that the candidate has held SAP or AP authorisation and understands its operational implications at a system level, not that they are the authorised person on site. Directors on large ASTI programmes are not the SAP - they are the accountability holder who ensures SAP resources are correctly deployed and that outage management is integrated into the programme schedule. Candidates who present SAP authorisation as a Director-level differentiator have misread what the role requires.

What does NEC4 experience mean in practice at Director level?

At SPM level, NEC4 competence means issuing Early Warnings, preparing Compensation Event quotations, and managing the programme to contract. At Director level, NEC4 competence means managing the commercial outturn of a portfolio of NEC4 contracts, including the performance management of subcontractors under secondary Option X contracts, dispute resolution under W1 or W2, and the final account position on close-out. The EPC contract risk allocation decisions made at programme inception directly shape what a Director is managing commercially throughout delivery. Directors who have only operated under NEC3 and have no NEC4 close-out experience are at a material disadvantage on Great Grid Upgrade framework shortlists in 2026.

How Clients Get This Wrong in Job Briefs

The single most common briefing error LSP encounters from clients hiring at Director level in HV works is a job description written for a very senior SPM. The brief lists technical project delivery requirements - voltage experience, RAMS management, CDM Principal Designer duties, commissioning experience - without specifying the commercial authority, portfolio scope, or client interface accountability that defines the Director role. The result is a longlist of strong SPMs who cannot do the Director job, and a missed shortlist of genuine Directors who self-select out of a brief that reads below their level.

The fix is straightforward. A Director-level brief for an HV programme should specify: the number and value of concurrent projects in the portfolio, the delegated commercial authority threshold, the client interface level expected, whether supply chain performance management sits in the role, and the NEC contract type and close-out responsibilities. LSP's transmission and distribution recruitment team works with hiring managers to reframe briefs before they go to market, which reduces wasted longlist time by an average of three to four weeks on Director searches.

How long does it typically take to promote internally from SPM to Director in HV works?

Most EPC contractors and consultancies operating in the UK T&D sector move candidates from SPM to Director over a three to five year window after they reach senior SPM grade. The accelerant is not tenure but exposure: candidates who close out a major compensation event dispute, manage a portfolio of three or more concurrent projects, or lead a recovery programme on a distressed contract can reach Director readiness in two to three years. The time it takes to hire protection and control specialists illustrates how long specialist T&D hiring cycles run across the market - Director searches run longer still, typically 60 to 90 days from brief to offer acceptance.

Frequently Asked Questions

What is the main difference between an SPM and a Project Director in HV works?

An SPM owns the delivery of a single defined project within an agreed scope, escalating to the Director when issues exceed their authority. A Project Director owns accountability across a portfolio of projects, holds the commercial relationship with the client at programme level, and has delegated authority to commit the business on variation, change, and supply chain performance. The gap is commercial and leadership scope, not technical depth.

Is SAP authorisation required for HV Project Director roles?

SAP or AP authorisation is typically a threshold requirement for SPM roles involving live HV construction supervision. At Project Director level, the expectation is that the candidate has held SAP or AP authorisation and understands its operational implications, but the Director is not the designated SAP on site. Directors who present their SAP status as a Director-level differentiator have misread what the role requires.

What NEC contract experience do HV Project Directors need in 2026?

Project Directors shortlisted for Great Grid Upgrade framework roles in 2026 are expected to have operated under NEC4 and to have managed commercial close-out of NEC4 contracts, including compensation event settlement and final account. NEC3 experience alone is insufficient for most framework contractor shortlists. Experience with NEC4 secondary options, particularly Option X performance mechanisms, is a significant differentiator.

How many concurrent projects should an HV Project Director be able to manage?

On most ASTI and Great Grid Upgrade framework programmes, a Project Director oversees three to six concurrent substation or overhead line packages delivered by a team of SPMs. The Director manages shared resource, outage windows, and commercial dependencies across the portfolio. Candidates who have managed only a single large project at a time, however complex, are typically assessed as SPM-ready rather than Director-ready on framework contractor shortlists.

How do I know if I am ready to move from SPM to Project Director in T&D?

Three signals indicate readiness: you have personally closed out at least one disputed compensation event to final settlement; you have managed resource and programme dependencies across more than one concurrent project without sustained Director intervention; and you have held a client relationship at programme or framework level through a period of programme stress. If all three apply, you are operating at Director level regardless of your current title. LSP Renewables can benchmark your profile against live Director briefs on request.

About the Author

John Martin is Divisional Manager for Onshore Renewables at LSP Renewables, with over 15 years in the staffing industry and more than a decade specialising in renewable energy recruitment. John has built lasting relationships with recognised brands across the energy sector, holding key leadership and strategy positions throughout a career that spans the rapid growth of the UK renewables market. His current focus covers grid, interconnectors, HVDC, and solar/storage recruitment across the onshore renewables sector. Connect with John on LinkedIn or reach him directly at john.martin@lsprenewables.com or on +44 (0) 203 905 6227.

Ready to move from SPM to Project Director? Or hiring at Director level in HV works?

LSP Renewables benchmarks T&D project leadership profiles against live briefs across National Grid ET, SSE, AmcoGiffen, and the Great Grid Partnership supply chain. Permanent, contract, and interim cover across HV substations, overhead line, and HVDC packages. Talk to the transmission desk at LSP today.