The 10th house represents career, profession, livelihood, authority, fame, public image, reputation, work environment, and relationship with the father and authority figures (Government).

Whereas the 4th house represents home, personal life, relationship with the mother, peace of mind, conveniences of life, real estate, vehicles, connection with the motherland, school education, and childhood friends.

When the 10th house lord is sitting in the 4th house. You would treat your workspace as home and your co-workers as family. Or, you would simply be working from home. You could be working in the field of real estate, home furnishing, or automobiles. Your work/job would be connected to your motherland. Getting into business with childhood friends is possible. Your peace of mind would be directly affected by the career/business you choose. So, careful with that choice. Your father is likely to play the role of the mother.

Sun as the lord of the 10th house

If you are a Scorpio ascendant then Sun will be the lord of the 10th house. You would be working for a large corporation or would start something of your own such as a home-based business. Working at a small-scale is not your cup of tea. Your confidence level and your career would take-off after you turn 30. A career in the field of science, technology, or research is a good option. The relationship with the father would be distant as Sun is sitting in an unfriendly sign (Aquarius). And also, because Sun is losing its directional strength in the 4th house. The father would force his opinion on your career. However, an aspect of a benefic planet could improve your relationship.

Moon as the lord of the 10th house

If you are a Libra ascendant then Moon will be the lord of the 10th house. You would be emotionally attached to your work. You would treat your workspace as home and your co-workers as family. You'd have motherly qualities, and so you'd be good at managing people. You would take your work very seriously. You could pursue a career in the field of healthcare especially taking care of old ladies. So, you could be working in a hospital, or a nursing home. You would be organized and disciplined. Career success would come after the age of 30 since Moon is in the sign of Capricorn, which is ruled by Saturn. Your parents could be strict, especially the mother but the relationship would improve with time.

Mercury as the lord of the 10th house

If you are a Sagittarius ascendant then Mercury will be the lord of the 10th house. You would be philosophical about your work and would pursue something for the greater good. You would be a thoughtful speaker. You work would involve dealing with people in the privacy of your home, or an enclosed cabin in an office. A home-based business is a really good option for you since Mercury is also the ruler of the 7th house. A career as a counselor, a life coach, a spiritual guide, a psychiatrist, or an astrologer is a good option too. You could also excel in human resources, teaching at a school, writing (fiction), or a property business.

Mercury as the lord of the 10th house

If you are a Virgo ascendant then Mercury will be the lord of the 10th house. You would love talking to people. You'd enjoy sharing your expertise and knowledge with others. Any profession that involves training, mentoring, teaching or guiding others would be best suited to you. You would be a counselor or consultant of some kind. Your work would involve dealing with people in the privacy of your home, or an enclosed cabin in an office. A home-based business is a great option for you. You'd be dealing with people (co-workers/clients) who'd come from different cultural backgrounds. You could excel in a property business/real-estate advisory.

Venus as the lord of the 10th house

If you are a Capricorn ascendant then Venus will be the lord of the 10th house. You would be highly ambitious, would dominate co-workers, and would think of work only in terms of winning and losing. Since Venus is also the lord of the 5th house, your passion would be your career. You could build a career in the field of law (trying domestic violence cases), architecture, graphic design, or civil engineering.

Venus as the lord of the 10th house

If you are a Leo ascendant then Venus will be the lord of the 10th house. You would be highly ambitious. You'd be a good strategist and planner. You could build a career in the field of law trying cases related to domestic violence or sexual abuse. You could become a relationship coach, a psychologist, a researcher, or a social worker helping others overcome bad habits. You could also excel in architecture, graphic design, and civil engineering. A love relationship at work could be a cause of mental unrest and so try to keep your personal and professional life separate.

Mars as the lord of the 10th house

If you are a Cancer ascendant then Mars will be the lord of the 10th house. A business in the field of real-estate is a really good option. A career in the field of architecture, civil engineering, construction, interior design, finance (stock markets), and law (trying divorce cases, property disputes, or mergers & acquisitions) are also good options. You could be guilty of venting the frustrations of work at home and that would negatively affect your relationship with the family members, especially your mother. So, try to avoid bringing work at home.

Mars as the lord of the 10th house

If you are an Aquarius ascendant then Mars will be the lord of the 10th house. A business in the field of real-estate is a really good option. A career in the field of architecture, civil engineering, construction, interior design, finance (stock markets), financial engineering, and law are also good options. You would attract money in any kind of home-based business but you would vent the frustrations of work at home and that would negatively affect your relationship with the family members, especially your mother. So, try to avoid bringing work at home.

Jupiter as the lord of the 10th house

If you are a Pisces ascendant then Jupiter will be the lord of the 10th house. Any profession that requires training, mentoring, guiding or teaching is best suited for you. You'd enjoy sharing your expertise and knowledge with others. The purpose of your work would be to maintain social order by upholding law, religion, ethics, policies, etc. You could be a religious/community leader, a life coach, or something like that. You would excel in business advisory, real-estate consulting, and judiciary too.

Jupiter as the lord of the 10th house

If you are a Gemini ascendant then Jupiter will be the lord of the 10th house. Any profession that requires training, mentoring, guiding or teaching is best suited for you. You would be philosophical about your career and would pursue something which has a higher purpose. Your approach towards work would be analytical, and logical. You would excel in business advisory, real-estate consulting, corporate training, judiciary, or public service of some kind. You'd be well-respected for your knowledge, experience, and judgement in your local community.

Saturn as the lord of the 10th house

If you are an Aries ascendant then Saturn will be the lord of the 10th house. You would be in a routine based job/career in the services industry. Your career would take-off after your turn 30. A career in the field of healthcare is a good option and so you could be working in a hospital or a nursing home taking care of old people (women). Your parents could be strict or the relationship with them would be distant, especially with the mother.

Saturn as the lord of the 10th house

If you are a Taurus ascendant then Saturn will be the lord of the 10th house. You would be in a routine based job/career in the services industry. You could be working for the Government. Since Saturn is in a weak position in the sign of Leo, you should avoid conflicts (ego battles) at work. Your parents would be strict or the relationship with them would be distant. Your career would take-off after you turn 30.

Rahu as the lord of the 10th house

If you are a Taurus ascendant then Rahu will be the lord of the 10th house. You would be drawn towards a creative career. Fame would be more important to you than money. Since Ketu is in the 10th house, there are better chances of success in a foreign land. You would settle down in your career after you turn 30.

Ketu as the lord of the 10th house

If you are an Aquarius ascendant then Ketu will be the lord of the 10th house. The relationship with the parents would be distant, especially with the mother. Since Ketu is in the sign of Taurus, you would be detached from the desire of hoarding wealth or owning a property. A career in the field of research, mystical science, or finance is best suited to you.