I'm trying to listen to an old dictaphone tape recording from the
early 80's.  The cassette has the sounds of my childhood locked
inside.  I don't know the make or model of the equipment that recorded
it, but I'm looking for an audio engineer who can help me convert the
recording to a more modern media.

picture of the cassette
http://www.alpern.org/weblog/images/dictaphone.jpg

My first guess is IBM dictaphone tape, just because those were common.

Instead of an audio engineer, try asking your local school for the
blind.  Those places do a ton of dictaphoning; remember how George
Costanza pretended to be blind so he could get his management textbook
on tape?  Well you could do the opposite -- pretend to be deaf.

That's a very unusual looking tape. Are there any specific markings on
it apart from 'Made in Germany'? Here are a couple of companies that
claim to be able to extract the contents for you -- both in Europe I'm
afraid. Neither mentions this tape specifically though.

Studio Zuid
http://www.studio-zuid.nl/HTML/e_oude.html

Pristine Audio
http://www.pristineaudio.co.uk/Formats.html

The markings on the outside of the cassett say:

Made in Germany

5005

031
032

INT (I think this is the name of the manufacturer)

A friend tried to copy the tape but found that it was
recorded at a slower speed then his deck would play. I've sent email
to Studio Zuid.  If they think they can help I'll accept your answer
alisonscott-ga.

If your buddy can playback at high speed,
then it's not an ordeal to capture that with a PC soundcard,
and then use freeware/shareware (like CoolEdit)
to adjust the sample rate back to normal speed.