Professional resume writers are great - if they are used to doing resumes for USAJOBS - otherwise, the one and two page resumes that most "pro's" will prepare for you, just wont normally get you across the finish line for a position posted on USAJOBS. You certainly want to tailor your resume to the job posting but there is one more tweak that many people don't seem to consider...
Every position on USAJOBS comes with a "Questionnaire" that will ask you if you are untrained on a task, trained but haven't done the task on the job yet, done the task as part of your job but needed to be supervised, performed the task independently and without supervision, or considered to be an expert at this task can normally supervises others.
YOU DO NOT HAVE TO BE AN EXPERT in every question.
You can be an expert in every single task and STILL NOT GET THE JOB
The resume you post in USAJOBS needs to reflect the content of the questions in that questionnaire...
"Identify training problems or shortfalls through mission analysis, job analysis, and other operational feedback and recommend effective solutions."
Sure go ahead and put that you are an expert at this task. If you are looking for a GS11 job, great - you could also get away with putting that you can do it independently and without review...
...wont matter - as a GS11, you aren't going to be in charge of anyone anyway.
Just make sure that instead of writing a bunch of flowery language that says, "Ran the most productive division in the company. Selected to be the dark overlord of the known universe"
EVEN IF ITS TRUE
Instead try slipping the words from the questionaire into your resume,
Increased production by Identifying training problems and shortfalls through detailed mission analysis. Recommended effective solutions using operational feedback while serving as the dark overlord of the known universe.
Everyone - including USAJOBS - will swear that they do not use an AI protocol to find matches between the job posting and your resume - so it must be a coincidence - but it is a pretty consistent coincidence.
I'd say go with it and gamble on 'the coincidence' that the resumes that match the questionnaire "seem" to get picked up more often than the ones that dont...
I've picked up two different gigs on USAJOBS (a GS11 and a GS12) using that approach and got all the way to the final round of interviews (GS-13) on a third. I knew the guy that got hired for the GS-13 job and he was flat out, a better all around pick than I was.
I've worked with a couple of contractors that applied for GS positions in the sections that they were already working in that "knew better than me" and used their own resume strategy - neither of them even got an interview.
That questionnaire is like having the answers to the test.
Your milieage may vary