These days, plenty of consulting firms make money peddling advice on cybersecurity. Only one is run by a man designated special adviser to the president of the United States.
Earlier this month, President-elect Donald Trump named former New York City Mayor Rudolph Giuliani, who heads a cybersecurity practice at the Miami-based law firm Greenberg-Traurig, as his chief adviser on cybersecurity issues.
Giuliani's new title is more than just another notch on his resume. It's also likely to be good for business.
"The way the world works, if you're perceived as having proximity to power, that brings certain advantages," says William Galston, senior fellow in governance studies at the Brookings Institution.
Trump also named another longtime friend and supporter, billionaire investor Carl Icahn, his special adviser on regulatory issues.
White House titles can be opaque, and "special adviser" is an especially vague one, meaning whatever the president wants it to mean.
"These are people outside the government who the president trusts and wants to confer with, but who have no formal title and are not hired by the government, not paid by the government, don't have a formal office, but who do have access to the president, because the president wants to listen to them," says James P. Pfiiffner, university professor of public policy at George Mason University.
Unlike other White House staff positions, "special advisers" don't have to comply with federal conflict-of-interest laws, which means they can hold onto their day jobs.
Icahn, for example, is a longtime investor with big stakes in many major companies that have business before the federal government, including Xerox, AIG and Allergan.
"I think there's a significant cause for concern there. You have people who are going to be advising the president, apparently in an important way, on issues that directly affect their businesses," says Noah Bookbinder, executive director of the Center for Responsibility and Ethics in Washington.
Bookbinder notes that because special advisers aren't formal government positions, they're not covered by conflict-of-interest laws and the public has no way of knowing what role they're playing behind the scenes.
"These people don't need to be officially vetted. They don't need to be confirmed and their arrangements are not in any official way scrutinized by Congress," he says.
In an interview on CNBC last month, Icahn dismissed concerns about whether it was appropriate to be advising the White House on regulatory hiring when he holds a stake in energy companies.
"I can understand saying that I shouldn't be involved in owning these if I were making policy," he responded. But, he went on, "Is there anything wrong with me saying this guy is the right guy for this job at this time? And it doesn't mean Donald is going to take my advice necessarily. I'm not the guy saying, 'He's got the job.'"
Giuliani told Politico his role as Trump adviser would present no conflict-of-interest, and he said he would never use his White House access to lobby the president.
But Politico said Giuliani "acknowledged that he might have business ties with some of the people he connects to Trump, and that he might be discussing government and private issues with some people."
It quoted Giuliani as saying:
"Probably 95 percent I'll have no connection with. If I happen to have a business connection with them, obviously I'd make them available also if they're business leaders... We do cybersecurity for many people. We are doing very well, and this gives me a chance to get a lot of new players into the game and put them before the government so they can help the government."
But the question of how much Trump should rely on special advisers with outside business ties is a complex one.
Galston, who served in the Clinton White House, says presidents regularly hear from a wide variety of people, many of whom have agendas.
"People give self-interested advice to politicians all the time. If that were a criminal activity I think our jails would be even fuller than they are now," Galston says.
It's the president's job to sift through the advice he hears and determine what course of action is in the best interest of the country, he says.
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