I do sales exclusively for my company, and have been in this role since 2003.
Our company has three full time sales guys (including me), and we all came up through the ranks of the company. I started as a groundman in 1995.
I think the key to finding the right fit in a sales position at a tree company is having a good understanding of what the company's goals are.
Are you a pruning and removal based company? Do you want to branch out into other services (PHC, Consulting, etc.)?
Nobody who works in the field wants to hear this, but selling the work is just as hard as the actual work, and to keep someone motivated to continue day in and day out to go out there with a smiling face and present your company in a professional manner, you are going to have to pay them. Probably more than you want to.
A good salesperson will want to see a compensation package that rewards the hard work they will have to do to get jobs on the schedule. But it does depend on how your organization is put together.
Do your leads just come from phone calls to the office looking for tree work? What percentage of income does your company commit to advertising? LIke Treehumper said, good leads turn into good jobs, and would most likely be good for a situation like commission-only pay (something in the range of 10%-12%, plus expenses).
If the salesperson is supposed to go out every day and knock on doors, cold call commercial properties and generally make work appear out of nowhere, they will want to see a little more security than commission only pay, something like a base salary and then a sliding scale of commission + bonuses for performance.
Is there anyone currently working at your company that has the potential for a sales position?
Doing sales full time can burn someone out if they are not right for the job. If the money is right, it's harder to get frustrated with the same thing day in and day out.
I find my job rewarding when the client is happy with our service, the crew knows that I care about their safety more than dollar bills, and when my boss tells me that I am doing a good job for the company (and gives me dollar bills).
Good luck in your search!
SZ