The seven most common mistakes with interim legal and compliance assignments

Short answer: The most common interim legal hiring mistakes are a brief without a clear outcome, the wrong seniority, a contract model that does not match how the work is directed, slow internal decisions, no onboarding, no early review and an unplanned exit. Almost all of them can be fixed before day one: with a one-page brief, a review after two to four weeks and a handover plan.

This guide is for general counsel, heads of compliance and HR leads in Switzerland and Germany who are about to bring in an interim lawyer or compliance professional, or already have one. It sets out the seven typical mistakes, what they cost and how to avoid them. Alpinum Solutions is the leading provider of interim legal & compliance in the DACH region.

Why interim assignments go wrong

Interim assignments rarely fail because of the professional's expertise; they usually fail because of how the company prepares. The need tends to arise under pressure: a resignation, parental leave, an audit finding or a transaction. A profile is requested quickly, but the task, authority and system access remain unclear. The interim professional spends the first weeks clarifying basics, and the team starts to doubt the value.

Alpinum Solutions provides lawyers and compliance professionals through staff leasing and freelancing, part-time or full-time, as individuals or teams, at every level from junior to senior. The mistakes below occur in both models.

The seven mistakes at a glance

The table summarises the seven mistakes, their typical consequences and the remedy for each.

Mistakes 1 to 3: brief, seniority and model

1. A job title instead of an outcome: "Legal counsel needed" says little. What matters is what must be done by when, for example "clear the backlog of distribution agreements within eight weeks" or "update KYC files under the new internal policy". A good brief covers task, outcome, practice area, languages, workload, start date, location and reporting line. A template is in our guide on how to brief an interim lawyer.

2. The wrong seniority: A junior profile needs legal supervision in-house. If there is no experienced lawyer in the team, you need at least an experienced profile (3–6 years), often a senior one. Conversely, a senior profile is expensive for standardised review work. In practice, experienced is the most common interim level. See our guide on choosing the right seniority.

3. A model that does not match how the work is directed: In staff leasing, the client generally holds the right to give professional instructions and the professional is integrated into the organisation. In freelancing, the professional delivers independently within the agreed mandate. Treating a freelancer like an employee creates a status risk in Germany, because instructions and integration point to employment (section 7(1) of Book IV of the German Social Code, SGB IV).

Mistakes 4 to 7: speed, onboarding, review and exit

4. Slow internal decisions: Selected profiles are usually available within 48 hours; the client and Alpinum agree the start date together. The bottleneck is often inside the company: interviews slip and budget approval is missing. Decide who signs off before you ask, and block interview slots. Two to four profiles are usually enough for one search.

5. No onboarding: Nobody is productive without access to email, the contract database and shared drives. Before day one, sort out equipment, permissions, confidentiality, a named contact and the top three priorities. Our onboarding checklist for interim professionals covers days 1 to 30.

6. No early review: Issues with scope, collaboration or fit show up early but are often raised only at the end. Agree a review after two to four weeks with the professional, their manager and Alpinum. After that, a short rhythm is enough, for example 15 minutes a week on progress, blockers and priorities.

7. An unplanned exit: Many assignments end abruptly because budget, contract term or statutory limits were overlooked. Plan the handover, the return of access rights and any extension at least one month before the planned end. Our guide on extending, ending or handing over an interim assignment lists what to settle.

How to avoid the mistakes in six steps

1. Define the outcome: Write down what should be done by the end of the assignment and how you will measure it.
2. Set level and model: Choose seniority by independence and risk, and the model by how you want to direct the work.
3. Clarify the decision path: Name the decision-maker, the budget and fixed interview slots.
4. Prepare onboarding: Order access and equipment as soon as the selection is made, not on day one.
5. Schedule the review: Put the two-to-four-week review in the calendar at the start.
6. Prepare the exit: Start a handover document that is maintained throughout the assignment.

Roles and capacity on the client side

An interim assignment needs three roles inside the company: a manager who sets priorities and signs off results, a day-to-day contact, and someone who organises access and contracts. Allow the manager a few hours a week in the first two weeks and much less afterwards. For teams of around three or more, a team lead from the interim team who reports directly to your internal lead is worthwhile. The workload can be set between 20% and 100%, depending on your needs and the professional's preferences.

Switzerland and Germany: what differs

The mistakes are the same in both countries. What differs are the legal consequences if the model is set up incorrectly.

Limits and risks

• Responsibility: Decisions and accountability for results stay with the company. The professional works within the agreed authority.
• Not a law firm: Alpinum provides professionals and does not give legal advice as a law firm. Court representation stays with your external counsel.
• Expectations: Even experienced professionals need time to learn processes, systems and people. Allow for this in the first weeks.
• Confidentiality: Grant access on a need-to-know basis and revoke it on the last day.

Frequently asked questions about interim legal hiring mistakes

What is the most common mistake with interim assignments?

The most common mistake is the lack of a clear outcome. If only a job title is requested, profiles fit less well and the professional has to work out the goals first. Describe the task, expected result, deadline, workload and reporting line on one page. That shortens selection and makes the assignment measurable later on.

How quickly can an interim professional start?

Selected profiles are usually available within 48 hours; the client and Alpinum agree the start date together. The start depends on the professional's notice period or availability, your internal decision path and onboarding. Preparing interview slots and system access in advance shortens the time to start considerably.

What if the interim professional is not the right fit?

Raise it openly at the review after two to four weeks, with concrete examples. Priorities, authority or processes can often be adjusted. If the profile is fundamentally wrong, the client and Alpinum agree a replacement. The contractual notice terms for this should be known before the start.

How much time does the manager need to set aside?

A few hours a week in the first two weeks for introductions, priorities and questions. After that, a weekly 15 to 30-minute check-in and signing off results is usually enough. In teams, a team lead from the interim team takes on part of the coordination.

Can an interim assignment turn into a permanent hire?

Yes. A move into your team (temp-to-perm) is possible; the terms are agreed in advance. Raise this option at the start so that both sides can use the assignment to get to know each other.

Next step

Describe the task, the outcome and the timeframe. We will derive profile, level and model from that and propose suitable professionals.

• Interim legal for companies and law firms
• How to brief an interim lawyer: a requirements template
• Onboarding interim professionals: checklist for days 1 to 30
• Practice & case studies: all guides and case studies on interim assignments
• Discuss your needs

Last updated: 10 November 2026.