At Johns Hopkins Applied Physics Lab, posting 21299
https://tas-jhuapl.taleo.net/careersection/2/jobdetail.ftl?job=21299&tz=GMT-04%3A00&tzname=
• Have a B.S. in marine biology, zoology, aquaculture or a similar field.
• Have demonstrated the ability to establish and maintain marine environments.
• Have basic proficiency with wet-lab techniques (e.g. pipetting, solution making, autoclaving).
• 1-4 years of experience in a laboratory setting.
• Are able to obtain a Top Secret security clearance. If selected, you will be subject to a government security clearance investigation and must meet the requirements for access to classified information. Eligibility requirements include U.S. citizenship.
You'll go above and beyond our minimum requirements if you...
• Have experience with marine invertebrate biology and cultivation of r-selected marine organisms.
• Have experience setting up new facilities focused on saltwater environments.
• Have experience growing marine plants and marine microorganisms. (You can grow algae, can't you?)
I have no idea why the security clearance is needed, and I won't guess in case I'm accidentally right.