What people mean by regulatory work
It is the work of dealing with whichever body oversees your industry. That covers applications, licensing and registration, examinations and inspections, information requests and subpoenas, enforcement matters, negotiated orders, and occasionally the rules themselves through comment and guidance. The industries that generate the most of it are the heavily supervised ones, including financial services, healthcare and clinical operations, food and consumer products, transportation, licensed trades, alcohol and other permitted goods, and employers carrying verification obligations. What a regulatory law firm does day to day is less about argument than about assembling an accurate record and keeping a company's account of itself consistent.
Why the early response carries so much weight
The first written answer to an agency usually sets the frame for everything after it, and agencies keep what you send. Informal phone calls are noted in a file as well, so there is no truly off the record conversation. Before responding, gather the licenses and registrations, the full correspondence chain, internal policies and training records, prior inspection or examination results, and a clear account of who at the company has already spoken with the agency and what they said. Inconsistency between employees is a more common problem than any single unfavorable fact. Where a request is broad, its scope can sometimes be discussed rather than simply met.
Appeals differ, sometimes a great deal
Every agency has its own route for challenging a finding, and they do not resemble each other. Some require internal reconsideration first, some hold an administrative hearing before a decision maker within the agency, and only after that is a court usually available, often on a narrower review than people expect. Who decides, what evidence can be added, and what a reviewing court will look at all differ between agencies and between federal and state bodies, so we do not assume a process before confirming it. Deadlines are strict and they differ. In a first conversation we identify the agency, the stage you are actually at, and whether anything can still be resolved before a formal finding is entered.