In one extreme we have this anecdote Bill Gates has recited:
Bill Gates said:
Bill Gates recalls once being invited to speak in Saudi Arabia and finding himself facing a segregated audience. Four-fifths of the listeners were men, on the left. The remaining one-fifth were women, all covered in black cloaks and veils, on the right. A partition separated the two groups. Toward the end, in the question-and-answer session, a member of the audience noted that Saudi Arabia aimed to be one of the Top 10 countries in the world in technology by 2010 and asked if that was realistic. “Well, if you’re not fully utilizing half the talent in the country,” Gates said, “you’re not going to get too close to the Top 10.” The small group on the right erupted in wild cheering.
And it's an important point, in my opinion. We can't create an environment that disenfranchises women from contributing their potential to entire industries. The last engineering firm I worked for was almost all male. For the first handful of years, the only women in the company worked in office administration capacities. When I left we had one young woman working as an EIT. Whenever the office admin ladies required maternity leave (three times for two women) it was no big deal and we all covered the extra work. One of the owners took over billing, we all shouldered the phones, someone else took care of payroll, we distributed clients by name and handled the correspondence that was done by the woman who was temporarily gone. When I took paternity leave, my workload was shouldered by others, and I was always on-hand to advise by phone, and on occasion I'd come into the office and assist.
In a small business, I think a good team environment can shoulder things in better ways than some large companies, because typically in a small business, you have more "multi-talented" people. Before we HAD the capacity to hire purely overhead administrators / office assistants, we all did those tasks ourselves. The workload were things we were trained on and still knew how to handle (or at least with some refresher training, we could) and things went smoothly.
Obviously for an engineer, it comes with different challenges than an office assistant, or a CAD drafter, or even a project manager. Someone in a design capacity on projects that may be spanning years... there are more difficulties. I do not believe they are insurmountable, however.
I've never been in the military, but I have worked with several Marines in my time. One of the phrases a couple of them taught me was "Semper Gumby" and at first it made me chuckle but it's actually a good, clever reminder about a very important credo, especially in small businesses. "Always be flexible" - don't be one of those types that sits there saying "That's not my job," or "It's not my problem". Instead accept the challenges in front of you and do what it takes to satisfy the currently unfulfilled requirements. If it is the labor or contributions of an employee, find a way to create redundancy for the sake of security.
Typically a person won't take leave from work until very, very late in pregnancy (assuming fair-enough health) or until after birth. So it's not like there isn't a large amount of warning that you're going to be in a bind.
You can hire a 'temp' or 'contractor' for many positions, if the rest of the company can't shoulder it alone.
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NX8.0, Solidworks 2014, AutoCAD, Enovia V5