Considering a Career in Consultancy? Why This is the Time to Make the Change?
If you're an expert in STEM, weighing the options between trying to secure your next permanent position and building more flexible opportunities as a consultant, you're not alone. Careers in STEM run on precision, so it makes sense that the biggest barrier to switching isn't usually appetite for risk. It's a lack of clear, reliable information. Here's what you actually need to know.
What's the real difference between permanent employment and consultancy work?
In practice, the difference comes down to control and integration. On paper, the differences can look overwhelming.
As an employee, your employer dictates how, when, and where you work, provides your tools, manages your training, and in return offers job security, statutory protections, and benefits like pension contributions, sick pay, and paid leave.
Meanwhile, as a contractor, many of those aspects fall onto you. While you might enjoy a higher day rate and greater flexibility much of the security of employment disappears. But it doesn’t have to. Working with CMC is a balance between the two, providing access to exclusive projects, high day rates and freedom over your future while supporting you with everything else.
We work closely with all our consultants, giving them a clear overview of the market, their options, and the ability to make the decision right for them. Many consultants work with CMC over long periods, not because they need to, but because it gives them the best opportunities to maximise their unique expertise.
What do STEM professionals actually gain from making the switch?
High rates and more freedom are the headlines. However, within STEM many of the most ambitious projects use expert consultants rather than employing teams and individuals. For STEM experts looking for more variety and exposure to limited projects, switching can bring plenty of opportunities.
Consultants in STEM fields often gain faster exposure to varied technical environments, projects, and tools than they would in one organisation, which compounds into a stronger, more marketable skill set over time. Many also gain genuine control over their schedule and workload in a way permanent roles rarely offer, the ability to take a month off between contracts, choose projects aligned with specific technical interests, or scale workload up and down around other commitments.
There's also a commercial upside that's easy to underestimate; consultants who build a strong reputation in a specialist niche, semiconductor design, cloud infrastructure, regulatory-affairs engineering, often find themselves with more negotiating power and more interesting project choices than they had as an employee competing for promotions inside a single hierarchy.
In one way or another, turning to consultancy is a brilliant alternative to full employment and especially for experts in STEM. Most of the anxieties surrounding the move are manageable if not unfounded, and the upsides offer rewards that most engineers would die for.
How does consultancy legally differ from employment?
A lot. Legally speaking, working as a consultant for CMC (a business of one) means you take up all the legal responsibilities an employer might. However, many authorities are reconsidering how they categorize this form of work.
Tax authorities across the UK, EU, and US increasingly look past the label on your contract and assess the actual working relationship. What a worker is called isn't relevant; a worker may be classified as an employee regardless of the title or label given to them, and signing an independent contractor agreement isn’t always enough.
If you work exclusively for one client, in their office, on their schedule, using their equipment, you may functionally still look like an employee in the eyes of the law, even if you've called yourself a consultant, freelancer or a contractor. This is the single most important thing to understand before going independent. (US Department of Labour, 2026)
What contract types exist across the UK, Netherlands, Germany, the US, and the EU?
Across the world the categorization parameters differ, with some countries offering clearer guidelines than others. It’s important to consider the local framework before making the switch.
United Kingdom. Most STEM consultants operate through a personal service company (PSC), invoicing clients directly. Your tax treatment depends on IR35 status: genuinely independent work falls outside IR35; work resembling disguised employment falls inside it, with tax deducted at source. Umbrella companies are a common alternative if you'd rather not run a limited company. Fixed-term employment contracts and statement-of-work agreements are also used, particularly for project-based engineering or R&D work. (GOV, 2026)
Netherlands. Consultants register as a ZZP'er (zelfstandige zonder personeel) and invoice clients directly. Enforcement of the Wet DBA is now full and active, assessed using nine criteria established by the Dutch Supreme Court's rulings. Statement-of-work arrangements through an agency are common alternatives for consultants who can't easily demonstrate independence from a single client. We recently published a full breakdown of the Dutch law changes, read everything here. (Zzp-pulse, 2026)
Germany. Consultants register as either a Freiberufler (liberal professional, common for many engineers, IT consultants, and scientists) or Gewerbetreibender (trade-registered business). The defining legal risk is Scheinselbstständigkeit, assessed by the Deutsche Rentenversicherung. Many consultants proactively request a Statusfeststellungsverfahren, a formal status ruling, before starting a long engagement with a single client. (Deutsche Rentenversicherung, 2025)
United States. The core distinction is W-2 (employee) versus 1099 (independent contractor). The IRS uses a three-factor test covering behavioral control, financial control, and the type of relationship. Consultants pay the full 15.3% self-employment tax themselves, since there's no employer to cover half of it, and are generally required to make quarterly estimated tax payments. Corp-to-corp arrangements (contracting through your own S-Corp or LLC) are common among experienced STEM consultants for tax efficiency. (IRS, 2026)
EU generally. Beyond the Netherlands and Germany, most member states follow a similar pattern: register as self-employed locally, or work through an Employer of Record (EOR) if the client has no local entity. The EU's Posted Workers Directive governs contractors temporarily working in a member state other than their own, and most countries are tightening worker-classification rules in some form, even where (like Sweden's F-skatt system) the administrative process is comparatively lighter. (European Commission, 2026)
What stops people from switching from employment to consultancy?
The earning gap. Most consultants enjoy a high-end day rate. However, projects end and consultants can face months out of work. But not with CMC.
A consultant's anxiety isn't earning potential; it's the uncertainty of how long it takes to land the next contract. This is legitimate but not unsurmountable with a little foresight and planning. And with CMC by your side, you can rely on frequent placements or extensions. Our backend teams and consultants work hand in hand to understand the status of projects, future opportunities, and market factors. That oversight means CMC consultants are rarely left without options.
‘Initially I was concerned about being a consultant with a minimal contract. However, with my work and CMC’s support we kept extending and grabbing a new contract with the same client which extended over three years.’ - Gaurav Sureshrao Ukande, CMC Consultant
‘[CMC] always gives a chance and opportunity for [extended contracts] ... CMC gives full support from their backend teams, and they have a good relationship with consultants to make sure everyone under CMC stays for a long period.’ - Zamri Bin Ngatam, CMC Consultant
To be extra safe, you can forecast your income and plan around worse case scenarios. Consultants who have a floating balance to tie them over between projects remove most of the anxiety that comes along with leaving employment.
The admin burden is also real. Invoicing, chasing payment, basic bookkeeping, insurance, and pension arrangements are unfamiliar territory for many technical professionals, and this is frequently a dealbreaker rather than financial risk itself. CMC’s dedicated backend teams take a lot of that burden off your shoulders: invoicing, chasing payments and hashing out the logistics for you so you can focus on the work at hand.
What matters less than people assume: the idea that consultancy is irreversible. There's a common belief that once you leave permanent employment, getting back in is harder or signals instability. In STEM fields with persistent skills shortages, this is largely a myth. Many high-level professionals now prefer to stick with the flexibility and higher earning potential of managed consultancy, especially with the support of businesses like CMC.
What steps should I take if I am going to leave employment for consultancy?
Do your research. A little planning will go a long way and help you relieve the anxieties that come along with the unknown.
Start by building a financial buffer, ideally three to six months of expenses, before you hand in notice. This single step removes most of the anxiety around the income gap and allows you to pick and choose your projects as a consultant.
Get clear on your tax and legal structure before your first contract starts, not after. In the UK, understand your likely IR35 status. In the Netherlands or Germany, understand the classification criteria that apply to your situation. In the US, understand whether you're being engaged as 1099 or whether corp-to-corp makes more sense for you. These steps don’t take much to cover but ticking them off will give you clarity and choice moving forward. (European Commission, 2026)
Talk to a specialist accountant early. This is one area where the cost of advice is consistently lower than the cost of getting it wrong.
Build relationships with specialist consultants in your field before you need them. Coalesce Management Consultancy is one of Europe’s best and fastest growing firms specializing in STEM. From Advanced Engineering to BESS, renewables, and life sciences, we work with some of the most ambitious projects in the world. Our consultants have exclusive access to these projects and in turn become some of the most sought after STEM talent in the world.
One lesson we’ve learnt over the years is that Consultancy pipelines run on relationships and reputation, and the earlier you start building both, the shorter your gaps between contracts will be. Schedule a call with us today.
Price in your own benefits. Calculate what your pension, healthcare, and leave currently cost your employer to provide, and build that into your day rate expectations rather than treating it as a hidden cost you'll absorb. In some instances, CMC manages benefits too.
If you’re thinking about switching or already have, schedule a call with us today. With a decade of hands-on experience and an award-winning global team, CMC is the perfect place to start your next chapter.
FAQs
If I become a consultant, will I legally count as a contractor, or could I still be treated as an employee?
It depends on how you actually work, not what your contract says. Tax and labor authorities in the UK, EU, and US increasingly look past job titles and assess the real working relationship — things like whether you work for one client only, use their equipment, and follow their schedule. If your day-to-day work still looks like employment, you may be classified as an employee regardless of what your contract calls you. This is worth understanding before you leave your job, since the right structure (PSC and IR35 status in the UK, ZZP'er registration in the Netherlands, Freiberufler/Gewerbetreibender status in Germany, or 1099/corp-to-corp in the US) varies significantly by country.
What's the biggest financial risk, and how do I protect against it?
It's usually not the pay — consultant’s day rates are typically higher than equivalent salaries. The real risk is the gap between contracts and not knowing how long it will last. The article recommends building a financial buffer of three to six months of expenses before handing in your notice, forecasting income against worst-case scenarios, and pricing your day rate to cover what your employer currently pays for your pension, healthcare, and leave, rather than treating those as costs you'll quietly absorb.
Is switching to consultancy a one-way door — will it hurt my chances of going back to permanent work later?
Not really, at least not in STEM. There's a common assumption that leaving permanent employment makes it harder to return, or signals instability, but in fields like engineering, data, and life sciences — where skills shortages are persistent — hiring managers tend to care more about what you've actually built and solved than the shape of your employment history.
References
Internal Revenue Service. (n.d.-b). Self-employment tax (Social Security and Medicare taxes). U.S. Department of the Treasury. Retrieved July 1, 2026, from https://www.irs.gov/businesses/small-businesses-self-employed/self-employment-tax-social-security-and-medicare-taxes
UK Government. (2026, February 26). Understanding off-payroll working (IR35). GOV.UK. https://www.gov.uk/guidance/understanding-off-payroll-working-ir35
Zzp-Pulse. (n.d.). False self-employment in the Netherlands 2026. Retrieved July 1, 2026, from https://zzp-pulse.nl/en/blog/schijnzelfstandigheid-2026
Deutsche Rentenversicherung. (n.d.). Selbstständige: Das Statusfeststellungsverfahren [Self-employed individuals: The status determination procedure]. Retrieved July 1, 2026, from https://www.deutsche-rentenversicherung.de/DRV/DE/Rente/Arbeitnehmer-und-Selbststaendige/03_Selbststaendige/statusfeststellungsverfahren.html
Internal Revenue Service. (n.d.-a). Independent contractor (self-employed) or employee? U.S. Department of the Treasury. Retrieved July 1, 2026, from https://www.irs.gov/businesses/small-businesses-self-employed/independent-contractor-self-employed-or-employee
European Commission. (n.d.). Posted workers in the EU: Guidelines & social security rules. Your Europe. Retrieved July 1, 2026, from https://europa.eu/youreurope/business/human-resources/cross-border-posted-workers/posting-staff-abroad/index_en.htm
European Commission, Directorate-General for Employment, Social Affairs and Inclusion. (n.d.). Posted workers. Retrieved July 1, 2026, from https://employment-social-affairs.ec.europa.eu/policies-and-activities/moving-working-europe/working-another-eu-country/posted-workers_en
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