Jeg jobber dels ved inngangskontrollen, dels ved vannstasjonen.

Dels ... dels ... means something like partly ... partly ..., some of the time ... some of the time ..., or in part ... in part ....

So:

• Jeg jobber dels ved inngangskontrollen, dels ved vannstasjonen.

means that the speaker works in two different roles/places: part of the time at the entrance control, and part of the time at the water station.

It is a neat way to divide someone’s work between two functions.

It is perfectly correct Norwegian, but it can sound a bit formal or written compared with everyday speech.

In more casual Norwegian, people might more often say something like:

• Jeg jobber både ved inngangskontrollen og ved vannstasjonen.
• Jeg jobber litt ved inngangskontrollen og litt ved vannstasjonen.

The version with dels ... dels ... is especially useful when you want to emphasize a split of duties.

Ved often means at, by, or near, depending on context.

In this sentence, ved is best understood as at:

• ved inngangskontrollen = at the entrance control
• ved vannstasjonen = at the water station

It is used because the speaker is working at a particular station or function point, not literally inside something in the way i would suggest.

So Norwegian often uses ved for places like desks, stations, checkpoints, counters, etc.

Inngangskontrollen is a compound noun:

• inngang = entrance
• kontroll = control / check

Together, inngangskontroll means something like:

• entrance control
• entry check
• check-in/security at the entrance

The form inngangskontrollen is the definite singular form, meaning the entrance control.

This is also a compound noun:

• vann = water
• stasjon = station

So vannstasjon means water station.

The form vannstasjonen means the water station.

This could refer to a place where people get water, for example at an event, race, festival, or similar setting.

The ending -en marks the definite singular for many masculine nouns in Norwegian.

So:

• inngangskontroll = entrance control
• inngangskontrollen = the entrance control

and:

• vannstasjon = water station
• vannstasjonen = the water station

Unlike English, Norwegian often adds definiteness as a suffix at the end of the noun instead of using a separate word like the.

Because Norwegian usually expresses definiteness by attaching it to the noun itself.

Compare:

• en stasjon = a station
• stasjonen = the station

So in this sentence:

• inngangskontrollen already means the entrance control
• vannstasjonen already means the water station

You do not need a separate word like the.

Both can mean work, but jobber is more common in everyday speech.

• jeg jobber = I work / I’m working
• jeg arbeider = I work / I’m working

Arbeider can sound a bit more formal, written, or sometimes old-fashioned depending on context. For most everyday situations, jobber is the more natural choice.

It can mean both, depending on context.

Norwegian present tense often covers both:

• I work
• I am working

So Jeg jobber dels ved inngangskontrollen, dels ved vannstasjonen could mean:

• this is my usual job arrangement, or
• this is what I’m doing at the moment / during this event

The surrounding context tells you which is meant.

Because this is a normal main clause with the subject first:

• Jeg = subject
• jobber = verb

That gives the standard Norwegian main-clause pattern:

• Subject + verb + other information

Then the rest of the sentence explains where/how the work is divided:

• dels ved inngangskontrollen, dels ved vannstasjonen

So the structure is very straightforward.

The comma helps separate the two parallel parts:

• dels ved inngangskontrollen
• dels ved vannstasjonen

It makes the sentence easier to read and highlights the balanced dels ... dels ... structure.

In writing, this kind of comma is very natural.

Yes, you could say:

• Jeg jobber både ved inngangskontrollen og ved vannstasjonen.

That means I work both at the entrance control and at the water station.

The difference is subtle:

• både ... og ... focuses on both places being true
• dels ... dels ... focuses more on the idea of division, as if the work is split between them

So dels ... dels ... is a better choice if you want to stress that the person does one part here and another part there.

No, not usually.

It means the person’s work is divided between the two places/functions. In normal interpretation, that means:

• sometimes at the entrance control
• sometimes at the water station

It does not suggest literal simultaneous action. It suggests a split of duties or shifts.

Yes, the definite forms suggest that these are specific, known stations in the situation being talked about.

For example, at an event, everyone may know which places are meant:

• the entrance control
• the water station

That is why definite forms sound natural here.

Yes, and this is very common in Norwegian. A good strategy is to split them into smaller pieces.

For example:

• inngangskontrollen
  • inngang = entrance
  • kontroll = control/check
  • -en = the

So:

• inngangskontrollen = the entrance control

Likewise:

• vannstasjonen
  • vann = water
  • stasjon = station
  • -en = the

So:

• vannstasjonen = the water station

Being able to spot compound parts is very useful in Norwegian.

Very possibly, yes.

Words like inngangskontrollen and vannstasjonen suggest an organized setting such as:

• a festival
• a race
• a sports event
• a concert
• volunteer work

Of course, the sentence itself does not force that interpretation, but it strongly suggests some organized workplace with named stations or functions.