# Category 04 — High-Performance HW · PI · SI · Power Delivery · HDI PCB > Multiphase DCDC · PI/SI · Cadence Sigrity / PowerSI / PowerDC · LTspice · SIMetrix/SIMPLIS · HDI · FC-BGA · DDR/PCIe/USB/MIPI/LPDDR4 ## Summary The UK has a real but geographically dispersed high-performance hardware ecosystem. Genuine PI/SI/multi-phase DCDC roles cluster in **Cambridge** (silicon SoC bring-up boards, AI accelerators, networking), **Bristol** (Graphcore, defence comms, Dyson satellite offices), **Edinburgh/Livingston** (AMD ex-Xilinx, Cirrus Logic, Leonardo), the **M4 corridor** (Wokingham/Reading/Newbury — Arm, Broadcom, Sondrel), and **defence belts** (Stevenage MBDA, Cheltenham/Malvern, Filton). Yorkshire and Greater Manchester are thinner but not empty: **Blaize Leeds**, **Diodes Zetex Oldham**, **Thales Cheadle Heath**, **Pragmatic Durham/Sedgefield** within reach, plus broadcast/audio in Saltaire and Halifax. April 2026 hiring is moderate — strongest at **Arm, AMD, Graphcore, BAE/MBDA/Leonardo, Renishaw, Dyson, and Keysight** — with order-of-magnitude **~150–250 live UK postings** matching the SI/PI/multiphase-power/HDI keyword set across LinkedIn/Indeed/company sites. This profile (Sigrity/PowerSI, multiphase DCDC, FC-BGA, AI-accelerator boundary work) is unusually well matched to the **silicon-bring-up board** niche; strongest fits are Arm, AMD, Graphcore, Blaize, Pragmatic, Apple Cambridge, Renishaw and Dyson. Remote-only roles remain rare — most require 2–3 days on-site near a lab. ## Top UK Employers | # | Employer | UK HW site(s) | What they build (HW relevance) | |---|---|---|---| | 1 | **Arm** | Cambridge, Manchester, Sheffield, Belfast | SoC bring-up boards, FPGA emulation rigs, reference platforms (Neoverse, Cortex) | | 2 | **AMD** (incl. ex-Xilinx) | Cambridge, Edinburgh, Bristol | Versal/Alveo accelerator boards, FPGA cards, 112G SerDes test boards | | 3 | **Graphcore** | Bristol (Cambridge HQ shrunk) | IPU accelerator boards, IPU-POD systems, HBM/CoWoS substrate | | 4 | **NVIDIA** (incl. Mellanox) | Cambridge, Bristol, Bracknell | ConnectX/BlueField NIC boards, DGX-adjacent HW | | 5 | **Apple** | Cambridge (small), London | Custom silicon bring-up; secretive | | 6 | **Blaize** | **Leeds** | Edge-AI accelerator SoMs/boards | | 7 | **Pragmatic Semiconductor** | Cambridge + **Sedgefield (Durham)** | Flexible IC test/eval boards, fab-side instrumentation | | 8 | **Imagination Tech** | Kings Langley | GPU IP eval boards, FPGA prototypes | | 9 | **Salience Labs / Lumai / Oriole** | Oxford / London | Photonic + silicon AI accelerators (early stage) | | 10 | **Cisco / Arista** | Reading / Edinburgh (small) | Switch line cards (mostly designed in US) | | 11 | **Nokia Bell Labs / Networks** | Cambridge, Bristol | Optical line cards, ReefShark | | 12 | **Keysight Technologies** | **South Queensferry**, Winnersh | VNAs, BERTs, 110 GHz instruments — top-tier SI/PI work | | 13 | **Spirent / Viavi** | Crawley / Stevenage | Test platforms | | 14 | **BAE Systems** | Filton, Rochester, Cowes, Preston | Radar, EW, avionics PCBs, multiphase rails | | 15 | **MBDA** | **Stevenage**, Bristol | Missile electronics, RF/digital boards | | 16 | **Leonardo UK** | **Edinburgh**, Luton, Basildon, Lincoln | Radar, EW, defensive aids — heavy SI/PI | | 17 | **Thales UK** | **Cheadle Heath (Stockport)**, Crawley, Reading, Glasgow | Sonar, comms, avionics boards | | 18 | **Roke Manor** | Romsey | SIGINT, defence R&D HW | | 19 | **QinetiQ** | Malvern, Farnborough | Defence electronics R&D | | 20 | **Renishaw** | **Wotton-under-Edge**, Stonehouse, **Miskin** | Metrology, encoder ASIC boards, additive-mfg controllers | | 21 | **Oxford Instruments / Andor** | Abingdon, Tubney, Belfast | Cryo, NMR, scientific instrument HW | | 22 | **Dyson** | **Malmesbury**, Hullavington, Bristol | BLDC drive electronics, robotics, battery — heavy multiphase + EMC | | 23 | **JLR** | Gaydon, Whitley | ADAS/ECU HW | | 24 | **McLaren Applied / Williams AE** | Woking / Grove | Motorsport ECUs, KERS, telemetry | | 25 | **Diodes Zetex** | **Oldham** | Discrete power, LED drivers, MOSFETs | | 26 | **Vishay** | **Newport (Wales)**, Ebbw Vale | Discretes, wafer fab | | 27 | **Power Integrations** | Cambridge | AC-DC controller eval boards | | 28 | **Cambridge Consultants / TTP / Sagentia / Plextek** | Cambridge / Melbourn / Hertford | Project-based HW (medical, IoT, defence) | | 29 | **PA Consulting** | Cambridge (Melbourn Tech Centre) | Cross-sector HW prototyping | | 30 | **Focusrite / SSL / dCS / KEF / B&W** | High Wycombe / Begbroke / Cambridge / Maidstone / Worthing | Pro audio, DACs, mixed-signal HW | | 31 | **CommScope** (ex-Pace via Arris) | **Salts Mill, Saltaire** | Set-top boxes, cable modems, Wi-Fi gateways — the actual current occupant at the old Pace plc site (Pace → Arris 2016 → CommScope 2019). Some board-level HW work on home-networking equipment. [careers.commscope.com](https://careers.commscope.com/location/saltaire-jobs/8610/2635167-6269131-2638652/4) | | 31a | **EnSilica** | **Sheffield** + Cambridge Science Park (new 2026) + Bristol + Abingdon | Mixed-signal ASIC + mmWave/RF up to 175 GHz; UK Space Agency C-LEO funded. Sheffield is local to Leeds (~40 min). Direct fit for analogue/digital boundary, RF/mmWave HW work. [ensilica.com](https://www.ensilica.com/) | | 31b | **Filtronic** | **Cambridge Science Park** + **Sedgefield (NE England)** | RF/mmWave components and subsystems for Space, Defence, Telecom; transceivers, PAs, filters K-band–W-band up to 175 GHz. SI/PI-heavy work. [filtronic.com](https://www.filtronic.com/) | | 31c | **Curvalux** | **Sheffield (Electric Works, Sheaf St)** + planned £20M factory near **AMRC Rotherham** | Solar-efficient fixed-wireless-access broadband; software-defined multi-beam phased-array antenna systems, RF/PCB/power-efficiency-heavy. Sub-7 GHz Wi-Fi 6E products plus mmWave next-gen. £8M SCR Mayoral Combined Authority R&D grant. ~17 staff, scaling. Direct local fit (~40 min from Leeds) for analogue/RF/PCB/multiphase-power background. [curvalux.com](https://curvalux.com/) | | 32 | **Calrec Audio** (Audiotonix) | **Hebden Bridge** (Nutclough Mill) | Live-broadcast audio mixing consoles — Argo, Type R, Brio, Summa, ImPulse1 ST2110 IP audio engine. Some PCB / DSP-board hardware design alongside heavy DSP work. [calrec.com/careers](https://calrec.com/careers/) | | 33 | **Synamedia** (ex-Cisco Video / NDS) | **Staines-upon-Thames** + global | Often confused with Pace's Saltaire site, but Synamedia is a separate company — Cisco's Video Software Solutions sold to Permira (2018). HQ Staines, no Yorkshire HW office. [synamedia.com/careers](https://www.synamedia.com/careers/) | | 34 | **Reach plc** (publisher) | One Canada Square (London) + regional titles incl. Telegraph & Argus Bradford | Listed for completeness only — *not* an SI/PI engineering employer. Reach is the UK national/regional newspaper publisher (Daily Mirror, Express, Telegraph & Argus). Earlier draft confused them with the Pace successor at Saltaire; the real occupant is CommScope. [reachplc.com](https://www.reachplc.com/) | ## Regional Concentration | Region | Estimated HW/SI/PI HC | Key sites | |---|---|---| | **Cambridge / Cambs** | **3,000–4,500** | Arm, AMD, NVIDIA, Apple, Nokia, Graphcore (residual), Pragmatic, PI, Consultancies, Power Integrations | | **Bristol / Filton** | 1,500–2,200 | Graphcore, BAE, Dyson, Nokia, AMD, Toshiba | | **Edinburgh / Livingston / S. Queensferry** | 800–1,200 | AMD (Xilinx), Leonardo, Cirrus Logic, Keysight | | **M4** (Reading/Wokingham/Newbury) | 700–1,000 | Arm, Broadcom, Cisco, Sondrel | | **Stevenage / Hertfordshire** | 500–800 | MBDA, Airbus DS, Imagination | | **Cheltenham / Malvern** | 300–500 | QinetiQ, GCHQ-adjacent, Endace | | **Hampshire/Surrey** (Romsey/Crawley/Basingstoke) | 500–800 | Roke, Thales, Spirent | | **Oxford / Abingdon / Malmesbury** | 600–900 | Oxford Instruments, Dyson, Salience, Lumai | | **Greater Manchester** | **300–500** | Thales Cheadle, Diodes Zetex Oldham, Arm Manchester, BAE Radway Green | | **Yorkshire** | **150–300** | Blaize Leeds, Arm Sheffield, **CommScope (ex-Pace) Salts Mill / Saltaire**, **Calrec Audio (Hebden Bridge)** | | **North-East** | 200–400 | Pragmatic Sedgefield, Nissan Sunderland, Filtronic Sedgefield | | **Wales** (Newport/Cardiff) | 200–400 | Vishay Newport, IQE, Spirent Cwmbran | | **Derby / Midlands** | 300–600 | Rolls-Royce, JLR Gaydon, Aptiv Leamington | ## Live job postings (April 2026, order-of-magnitude) | Search | LinkedIn UK | Indeed UK | |---|---|---| | "Signal Integrity" | 60–90 | 40–70 | | "Power Integrity" | 20–40 | 10–25 | | "Hardware Engineer" (PCB+SoC filter) | 400–700 | 600–1,000 | | "Sigrity" | 15–30 | 10–20 | | "Cadence Allegro" | 40–70 | 30–60 | | "PCB Designer" | 200–350 | 250–400 | | "Multiphase DCDC" / "Power Electronics Engineer" | 150–250 | 200–350 | Net usable Staff-level matches per week: **~10–25 genuinely well-matched**. ## Yorkshire & Greater Manchester focus Honest picture: - **Leeds itself**: Blaize is the standout — small (~30 UK HW/SW), edge-AI accelerator boards, intermittent posting. Otherwise scientific/medical SMEs (Tracerco, Pivotal Labs) and university spin-outs. Real PI/SI vacancies usually 0–3. - **Sheffield / Rotherham**: Arm has a Manchester/Sheffield CPU verification + small HW group. **EnSilica Sheffield** is the under-rated find — mixed-signal IC design centre; analogue/digital boundary, RF/mmWave; ~40 min commute. **Curvalux** at Electric Works (Sheaf Street, Sheffield) plus a planned £20M factory near the **AMRC** in Rotherham — software-defined phased-array antenna RF/PCB/power, scaling on £8M SCR Mayoral Combined Authority grant. AESSEAL, Gripple — limited board design. Sheffield Uni AMRC adjacent. - **Bradford / Saltaire**: the Pace plc lineage at Salts Mill is now **CommScope** (Pace → Arris 2016 → CommScope 2019). Set-top / gateway / cable-modem engineering, mostly SW but with some board-level HW. *Synamedia* is a separate company at Staines — not at Saltaire, despite a common confusion. *Reach plc* (the newspaper publisher) is unrelated to the Pace site, listed here only because the original research confused the names. - **Greater Manchester**: **Thales Cheadle Heath** (avionics/RF HW — real PI/SI work, 2–5 roles typical), **Diodes Zetex Oldham** (analogue/power IC + eval boards), **BAE Radway Green** (defence munitions electronics), **Arm Manchester** (CPU). Siemens Manchester (industrial drives), Bruntwood-cluster startups. - **Realistic commuter radius from Leeds**: Manchester/Cheadle/Oldham (~1h), Sheffield (40 min), Sedgefield/Pragmatic (~1h45), Saltaire (~25 min). Hybrid 2–3 days on-site is workable. ## Notes & Caveats - **Clearance gating**: BAE/MBDA/Leonardo/Roke/QinetiQ require SC or DV; processing 6–12 weeks. - **Graphcore** has had multiple rounds of restructuring 2024–2025; Bristol HW team is leaner than headcount suggests on LinkedIn. - **Apple Cambridge** rarely posts HW roles publicly — usually via referral/recruiter. - **AMD Edinburgh** (ex-Xilinx) is the single best concentration of FPGA-board PI/SI work outside Cambridge. - **Diodes Zetex Oldham** is geographically perfect but mostly IC-level, not board-level — fit needs validation. - The Saltaire site (Salts Mill) is **CommScope**, not Synamedia and not Reach plc. CommScope is mostly software now — set HW-engineering expectations low. ## Sources - - - - - - - - - - - - - - - - - - - - - - - - - --- ## Wave-5 additions — Yorkshire / NE power-electronics, hydrogen, defence-adjacent, scientific instruments (April 2026) A follow-up sweep surfaced several high-fit power-electronics / multiphase-DCDC employers within ~1 h of Leeds, plus the UK's national-instruments tier. ### Yorkshire / North-East power & RF - **ITM Power** — Sheffield (~40 min); kV-scale multiphase DCDC for hydrogen electrolysers; ~80 engineers across Power Electronics, Controls, Embedded SW; growing rapidly. **The strongest local multiphase-power fit identified to date.** - **Faradion** (Reliance) — Sheffield; sodium-ion BMS + cell engineering; ~200-hire growth plan. - **Rolls-Royce SMR** — Sheffield; reactor C&I, safety-grade power & control electronics. - **Drax** — Selby (~30 min east of Leeds); generation control, BESS integration, C&I engineer roles. - **CSA Catapult** — Sedgefield NETPark (~1 h 45); compound-semiconductor RF + power-electronics applications centre, GaN/SiC inverters and PA work. - **Filtronic** — Sedgefield + Cambridge SP (already listed) — *now also* with confirmed PA/RF hardware-engineering openings April 2026. - **AMETEK Land** — Dronfield (~30 mi); high-temp IR pyrometry, mixed-signal HW, integrated FPGA + analogue-front-end design. - **Tracerco** — Billingham; industrial radiometric instrumentation, mixed-signal HW. - **Forsberg Services** — Heysham; GNSS/INS hardware, RF + multiphase aux rails. - **Northern Powergrid** — Yorkshire/NE; grid-scale protection electronics, less classical-board-design but power-system relevant. ### Scientific instruments tier (national-grade SI/PI/Power roles) - **Diamond Light Source** — Harwell (Oxon); accelerator/beamline control electronics, multiphase rails, FPGA + analogue. Multiple hardware roles open April 2026. - **STFC (Daresbury + RAL)** — Daresbury (~70 mi from Leeds, ~1 h 30 M62) and Harwell; instrumentation electronics. - **NPL** — Teddington + Huddersfield outpost; atomic-clock / quantum-control electronics. - **Gooch & Housego** — Ilminster + Torquay; photonics, acousto-optic & electro-optic modulators — RF + analogue HW. - **Servomex** — Crowborough; gas-analysis instruments; live *V&V Engineer* role April 2026. - **Pickering Interfaces** — Clacton-on-Sea; PXI / LXI switching HW, FPGA + analogue. - **AimTTi** — Huntingdon; lab power supplies, function generators, source-meters — direct multiphase-DCDC fit. - **Bruker UK** — Coventry / Banner Lane; analytical instruments. - **Coherent UK** — Glasgow; lasers, photonics drives. - **HBK / Brüel & Kjær** — Cambridge area; vibration/acoustic measurement HW. ### Motorsport HPP power electronics (see Cat 09 for full writeup) - **McLaren Applied** (Woking), **Mercedes HPP** (Brixworth), **Red Bull Powertrains** (Milton Keynes), **WAE / Fortescue** (Grove), **YASA / Mercedes** (Yarnton), **Cosworth Electronics** (Cambridge), **Bentley** (Crewe — closest to Leeds, ~80 mi), **Drive System Design** (Leamington), **Mahle Powertrain** (Northampton). ITM Power Sheffield, AMETEK Land Dronfield, and Hitachi Rail Newton Aycliffe are the three strongest *new* in-region power-electronics employers from this sweep. Diamond Light Source, AimTTi, and Pickering Interfaces are the strongest national instruments-tier finds.