You can switch between jobs at anytime, and if you choose to go back to a previous one you will still keep your rank and the job points you had (but the points do not carry between jobs).

All job points/income/stats are usually gained at 03:50 TC time, when the job crons run.
We have a Job Calculator (to calculate the best job you qualify for) Here (Temp down).

Army | Grocer | Casino | Medical | Law | Education

Army
Rank	Income	Requirements				Stats Gained			Points Gained	Special
		Points	Man	Int	End	Man	Int	End
Private	$125	–	2	2	2	3	1	2	1	Brute Force – Trade job point for strength
Corporal	$150	5	50	15	20	5	2	3	2	Steal Weapon – Random weapon for 10 job points
Sergeant	$180	10	120	35	50	8	3	5	3	–
Master Sergeant	$220	15	325	60	115	12	4	7	4	Bear The Brunt – Trade job points for Defense
Warrant Officer	$225	20	700	160	300	17	7	10	5	–
Lieutenant	$325	25	1,300	360	595	20	9	11	6	–
Major	$550	30	2,550	490	900	24	10	13	7	–
Colonel	$755	35	4,150	600	1,100	28	12	15	8	Hire a Spy – Get a players stats for 10 job points and $5,000
Brigadier	$1,000	40	7,500	1,350	2,530	33	18	15	9	–
General	$2,500	45	10,000	2,000	4,000	40	25	20	10	–

Grocer
Rank	Income	Requirements				Stats Gained			Points Gained	Special
		Points	Man	Int	End	Man	Int	End
Bag Boy	$150	–	2	2	2	2	1	3	1	Steal Cash – Money for Job Points
Price Labeller	$175	5	30	15	50	3	2	5	2	Steal Candy – Random bag of candy for 2 Job points
Cashier	$210	10	50	35	120	5	3	8	3	Steal Alcohol – Random bottle of nerve for 5 Job Points
Food Delivery	$250	15	120	30	225	10	5	15	4	–
Manager	$300	20	250	200	500	15	10	20	5	Stead Energy Drink – Random can of energy for 25 Job Points

Casino
Rank	Income	Requirements				Stats Gained			Points Gained	Special
		Points	Man	Int	End	Man	Int	End
Dealer	$250	–	2	2	2	1	2	3	1	Collect Tips – Random money for 5 job points
Gaming Consultant	$350	5	35	50	120	2	3	5	2	Pocket Tokens – 25 casino tokens for 1 job point
Marketing Manager	$500	10	60	115	325	4	7	12	3	–
Revenue Manager	$1,000	15	360	595	1,300	9	11	20	4	Steal Cash – Trade 1 job point for cash
Casino Manager	$1,750	20	490	900	2,550	10	13	24	5	–
Casino President	$3,500	25	755	1,100	4,150	12	15	28	6	Count Cards – Get cash for 10 casino points and $100,000

Medical
Rank	Income	Requirements				Stats Gained			Points Gained	Special
		Points	Man	Int	End	Man	Int	End
Medical Student	$400	–	0	300	0	4	12	7	1	–
Houseman	$600	5	100	600	150	7	17	10	2	1 Small first aid kit for 2 medical points
Senior Houseman	$950	10	175	1,000	275	9	20	11	3	1 First aid kit for 4 medical points
GP	$1,500	15	300	1,500	500	10	24	13	4	1 morphine for 7 medical points
Consultant	$3,000	20	600	2,500	1,000	12	28	15	5	–
Surgeon	$5,000	25	1,300	5,000	2,000	18	33	15	6	–
Brain Surgeon	$7,000	30	3,000	10,000	4,000	20	40	25	7	Revive Someone for 75 energy 2

Law
Rank	Income	Requirements				Stats Gained			Points Gained	Special
		Points	Man	Int	End	Man	Int	End
Law Student	$150	–	1,500	1,500	2,000	15	15	20	1	Contempt of Court – 3 nerve for 5 job points
Paralegal	$600	5	1,750	3,500	5,000	17	20	23	2	Class Action Lawsuit – Money for you and random people (100 job points)
Probate Lawyer	$750	10	2,500	5,000	7,500	19	23	30	3	–
Trial Lawyers	$1,500	15	3,500	6,500	7,750	25	27	35	4	Criminal Defense – Get someone out of jail for 15 job points
Circuit Court Judge	$2,500	20	4,000	7,250	10,000	27	30	38	5	–
Federal Judge	$5,000	25	6,000	9,000	15,000	30	33	45	6	Judicious – +10% Crime Success rate2

Education
Rank	Income	Requirements				Stats Gained			Points Gained	Special
		Points	Man	Int	End	Man	Int	End
Recess Supervisor	$300	–	0	500	0	8	10	9	1	Extra Curricular – Trade 10 job points for 100 Manual
Substitute Teacher	$400	5	300	750	500	13	15	14	2	Perserverance – Trade 10 job points for 100 Endurance
Elementary Teacher	$600	10	600	1,000	700	15	20	17	3	Bookworm – Trade 10 job points for 100 Intelligence
Secondary Teacher	$850	15	1,000	1,300	1,000	20	25	20	4	–
Professor	$1,000	20	1,500	2,000	1,500	25	30	25	5	–
Vice Principal	$1,750	25	1,500	3,000	1,500	30	35	30	6	–
Principal	$3,250	30	1,500	5,000	1,500	30	40	30	7	Cheat Sheet – 10% reduction in Education time2

¹ Special removed (5.14.2010)
² Once earned, can be used even when in another job/company, or unemployed.