Simon Gilmour

Partner and Head of Employment Law

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Simon is a highly experienced employment lawyer who has been advising businesses on employment and HR matters since qualifying in 1994. As Head of Employment at Harper James, he works closely with businesses to solve complex people-related issues. Simon has spent more than 30 years advising businesses on complex workplace issues, including 18 years as a partner and Head of Department.

Simon helps employers manage their people with confidence, providing practical, commercially focused advice that reflects both the legal position and the realities of running a business. He works with organisations of all sizes, from ambitious start-ups and scale-ups to global businesses, with particular experience in the technology sector.

His work covers the full scope of the employment relationship, from recruitment and contractual documentation through to workplace disputes, dismissals and post-termination protection.

Simon advises businesses on:

Simon has expertise in managing the people issues that arise during periods of significant business change. This includes TUPE transfers and service provision changes, company sales and acquisitions, and large-scale restructures and redundancy programmes.

Simon takes a pragmatic and business-focused approach – working closely with senior leaders to understand what they are trying to achieve and develop employment solutions that manage legal risk without losing sight of their wider commercial objectives.

Simon has advised businesses across a broad range of industries, including:

Outside work, Simon enjoys spending time with his two sons, watching his youngest son play rugby, keeping fit and travelling.

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IN THE MEDIA

Commentary from Simon Gilmour

June 2025

HS2 whistleblower awarded £230,000 by tribunal 

Personnel Today

June 2025

Whistleblowing and the cost of silence: Why SMEs must have policies in place 

SME Today

October 2025

TUC rejects suggestion that tribunal fees should return 

Personnel Today

October 2025

Labour weighs tribunal fees to deter vexatious claims 

International Employment Lawyer

November 2025

Polarising topics are feeding workplace division: what are the risks for employers? 

Lexology Pro

February 2026

1 in 10 bosses fear false allegations if they meet with junior staff 

SME Today


TESTIMONIALS

What our clients say

I have worked with HJ for the past five years primarily on employment matters, including immigration/visas. The employment team are always readily available and responsive and have worked with us on some very challenging matters through to conclusion. Myself and my team always appreciate Simon, Ella and Shaun's pragmatic approach to situations that align with the best strategic outcomes. A sense of humour is always very welcomed given the demanding nature that specific situations can generate.

Siobhan Wright Chief People Officer, Trust Payments

Availability for advice, with timely and reliable turnaround on reviews and legal drafting. Simon offers practical, balanced and timely advice. He remains highly responsive, particularly when fast turnarounds are required.

Anna Clarke Chief People Officer, Namos Solutions Ltd

We have worked with Harper James for a number of years now and it works really well for us as a business in that we can access their diverse team easily depending on our requirement at that time. They are a great team and good to work with.

Sarah Booth Commercial Director, Caterers Choice

I recently worked with Simon at Harper James Solicitors on an employment law case, and I couldn't be more impressed with their service. Simon was incredibly responsive and proactive, always thinking several steps ahead and providing expert guidance throughout the process. He clearly explained complex legal matters in a way that was easy to understand, and I felt confident in his expertise and advice.

Minogue Wong General Manager, Zung Leon UK

Excellent service! Incredibly helpful with their advice and practical options at every stage. They communicated clearly and quickly, including outside of normal working hours over Christmas. I highly recommend using Harper James, we certainly will use them again in the future

Sara Thompson HR Advisor, AKG

In my experience, solicitors speak a completely different language than anybody else, which can be confusing – especially if the matter at hand is a stressful topic. Simon and the team’s advice has been invaluable. They are solution-driven and didn’t quote the law at us but took the time to deliver advice clearly and concisely, making the legal position easy to understand.

Petra Felgen UK & Ireland’s Managing Director, CEWE

Dealing with Simon and Liz has been a great experience. Speed to response, accuracy, prepared to have discussions relating to clauses and how they will affect our business and the PAYE contractor

Rebecca Sabin Managing Consultant, Synchro Recruitment


News & insights

Legal updates

12 June 2025

Employment Rights Bill: Government response to Business and...

Legal updates

17 February 2025

April 2025 changes in employment law – what...

Legal updates

24 January 2024

‘I Quit!’ – How to deal with heat...

Legal updates

2 January 2024

Changes to employment law effective as of 1...

Legal updates

2 October 2024

New law on tips to generate £200m for...

Thoughts and opinions

15 May 2023

ACAS issues new guidance on reasonable adjustments for...

Legal updates

25 January 2023

UK Government launches holiday pay consultation

Legal updates

17 October 2022

UK Government reverses decision to repeal IR35 reforms

Ask the expert

30 September 2022

Do I need a work from home policy?

Client stories

16 June 2020

Skillcast collaboration helps employees log on and learn...

Thoughts and opinions

1 July 2025

Responsible Redundancy: What employers can learn from Wilko’s...

Thoughts and opinions

28 July 2025

Hiring confidence at a record low: why responsible...

Legal updates

12 August 2025

When procedures trip you up: Lessons for employers

Legal updates

30 October 2026

New trade union workplace access rights now in...

Legal updates

1 October 2026

When workplace misconduct becomes a regulatory issue: the...

Legal updates

27 August 2026

Sexual harassment and third-party harassment reform: what employers...

Thoughts and opinions

21 July 2026

Employment reform is changing how scaling businesses hire

Thoughts and opinions

26 May 2026

Why the Fair Work Agency should prompt employers...

Thoughts and opinions

17 December 2024

Events and webinars

14 November 2024

The Employment Rights Bill: An employer’s guide –...

Client stories

28 August 2024

Framing success: Supporting photo printing company CEWE with...

Events and webinars

24 April 2024

Employing overseas nationals in the UK

Events and webinars

31 January 2024

Company news

15 December 2023

Four partner promotions across our Employment, Corporate and...

Thoughts and opinions

13 October 2021

End of furlough: Low levels of redundancies and...

Thoughts and opinions

12 February 2021

Why the government’s holiday U-turn may present a...

Thoughts and opinions

17 April 2025

NI increases: why tax-efficient remuneration is more important...

Events and webinars

14 October 2026

Employment Rights Act: what SME employers need to...

Spotlight on our people

16 July 2020

Spotlight on our solicitors – meet Simon Gilmour