Answer
Wa`alykum As-Salamu wa Rahmatullahi wa Barakatuh.
In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
In this fatwa:
Working as an actuary for insurance companies is permissible, and the income you get from this work is lawful.
In response to your question, Prof. Dr. Monzer Kahf, Professor of Islamic Finance and Economics at Qatar Faculty of Islamic Studies, states:
Insurance in Islam
Insurance itself is not unanimously prohibited. Great scholars of the caliber of the late Sheikh Mustafa Az-Zarka (died 1999) believed it is permissible if there is no interest clause in the contract.
Is it haram to be an actuary?
Actuarial studies are important for insurance and pensions and they are in use all over the Muslim world. It just happened that those contemporary scholars who argued for its prohibition are not aware of the needs of contemporary life, in industry, trade, transportation, urban living, health, and life insurance.
Anyway even those scholars, who believe that insurance offered by profit-making companies is in sharp contrast to the one offered by mutual or cooperative companies, do not consider working in such companies a prohibited action.
Sheikh Muhammad As-Siddiq Ad-Darir of Sudan, a leading international Shariah scholar, who goes against commercial insurance and obviously against interest, argues that working for an interest-based bank is permissible as long as one avoids being a signatory of an interest-based contract, its writer or its signing witness.
By analogy, the matter with insurance companies is the same. And it is permissible to work for an insurance company, as long as you are not the person who signs the contract on behalf of the company.
In brief, I happen to be an admirer of the opinion of Az-Zarka. By the way, the late Mawdudi has similar opinion, and I believe that insurance is permissible as long as it is void of an interest clause. Working as an actuary for pension companies is permissible, so also is working as actuarial for insurance companies. The income you derive from them is halal (lawful).”
Allah Almighty knows best.