Upon his return from Europe and his father's death, Seifu as a young man traveled with Blattengeta
Heruy Wolde Selassie and other senior members of the imperial government to Europe assisting them with his foreign languages proficiency and foreign affairs advice. He spoke fluent English, French, German, Italian, Hebrew, and Arabic as well as Ethiopian ethnic languages Amharic, Oromomigna and Tigrigna. In June 1919, he was among the special commissioners sent to Europe by
Empress Zewditu who presented a letter of congratulations to the King and Queen of the United Kingdom for the success of the allied arms. He served as Ethiopia's Minister Plenipotentiary to France and Germany at different times between 1920 and 1927. He served as Ethiopia's Consul General to Eritrea appointed by
Empress Zewditu in 1923 and lived in Asmara till the end of 1926. Generally regarded as a man close to Lij Eyasu, the future Emperor Haile Selassie held him with some uneasiness, later recalled him from Eritrea and made him governor of the lucrative Chercher, Baka, and Miesso region in 1927 during which time he started a modern coffee farm at Mangudetu in the Baka district. Known for his hot tempered impatience for tardiness and poor performance at work by public servants in the rather uncivilized province compared to Asmara where he served as Consul General, he came to be known as "Seifu Gomoraw" that means Seifu the Volcano. In the mid-1930s, Hakim Workneh got Seifu's old job as governor of Chercher and Seifu was appointed as deputy governor upon the departure of Hakim Workneh leaving for England. In the early 1930s, he traveled to Europe with Blattengeta Heruy to help Ethiopia secure permission to buy arms and strengthen Ethiopian position in the
League of Nations. He won support from Germany that supplied essential weaponry to Ethiopia in the amount of about six million Reichsmark. Seifu used his expertise as supplier of arms to the Ethiopian Empire to bypass colonial powers encircling Ethiopia to deliver the weapons and ammunition. While serving as a public servant, he also led a very successful arms supply business partnering with another French educated Ethiopian, Ato Gebre Ebziabher. According to the surviving documents, they bought, imported and sold weapons and ammunition worth millions of Maria Theresa Thalers, a favored currency of that time in the Ethiopian Empire. He used the proceeds to acquire expansive commercial real estate and start modern farms in the country. In 1924, he was part of the delegation who met with the German president Herr.
Friedrich Ebert and his successor Herr.
Paul von Hindenburg. Ethiopia was represented by Dejazmatch Haile Selassie Abayneh, Lij Seifu Mikael and Ato Sahle Tsedalu. Dejazmach Haile Selassie Abayneh who raised Emperor Haile Selassie with his son Prince
Imru Haile Selassie was one of the senior nobles with whom Seifu enjoyed close affinity and traveled with him to European countries. Dejazmach Abayneh had a huge and positive influence on the Emperor during his regency. Many members of the monarchy and ministers used his influence to advance their opinions and ambitions. After the fascist Italian invasion during the
Second Italo-Ethiopian War, Seifu accompanied the Emperor to Djibouti along with Ato Mekonnen Habtewold, Fitawrari
Tekle Hawariat Tekle Mariyam and other notables according to Fitawrari TekleHawariat's autobiography. Before leaving Addis Ababa, Seifu became one of the nobles along with Leul Ras Kassa standing against those who decided the alleged elimination of Lij Eyasu convincing the Emperor not leave an heir to the Solomonic throne exposed, fearing doing so could mean the Italians can capture and use to legitimize their control of the country and effectively colonize the country. He later returned to Ethiopia from Djibouti after a fallout with the emperor due to an overheard conversation with Fitawrari TekleHawariat criticizing Haile Selassie over the death of Lij Eyasu. He joined the resistance leading a contingent of patriots at Awsa front which was the offshoot of the early struggle of the
Black Lions created by educated Ethiopians and disbanded members of the army led by Leul Ras(Prince) Imru. The Awsa front was in close proximity to Djibouti and joined by few returnees who decided patriotism over exile. He was captured early in the struggle by the Italians after his unit at Awsa was destroyed. After a brief incarceration in Addis Ababa, he was transferred to the Asinara island prison in Italy. His wife Sara Martin, her mother and her siblings were also among the 400
Ethiopian POWs during the Second Italo-Ethiopian War at Asinara He was repatriated back to Ethiopia with his wife by the end of 1939 after relentless requests by his nephew Kebede Michael who was employed by the Italians when they entered the capital. He was fluent in Italian, French and English. It was common with prominent collaborators and employees to request the release of their relatives; Ras
Seyoum Mengesha was one of the most prominent Ethiopians who submitted to the enemy but yet played a role in securing the release of many of his relatives and several Ethiopians. Upon his return, Seifu was suspected by the Italians for getting and passing crucial tactical information from his nephew
Kebede Michael and Dejazmatch Mellise Sahle who was also a collaborator and father-in-law of Kebede Michael, to the patriots in Gojjam and Northern Shewa.
Belay Zeleke and other patriots used the information secretly sent to them by the nobles who had ways of getting and transmitting information. Due to lack of evidence, the Italians overlooked the allegations against Kebede Michael and the fascist appointed Dejazmatch but put Seifu under house arrest at his estate till the liberation. The renowned and the formidable patriot Ras
Abebe Aregai intervened on behalf of Kebede Michael, revealing to the emperor that it was underground collaborative work conducted by learned Ethiopians like Kebede Michael who made it possible for the patriots to attack the right targets and evade capture when pursued by the fascists. Kebede Michael would later rise to high government offices and became one of the closest confidants of the Emperor despite his uncle's conflict with the monarch. After the liberation, Emperor Haile Selassie, disappointed by Seifu's opposition over the highly secret decision to eliminate Lij Iyasu before leaving for exile and the remarks he made to him in Djibouti, ordered him to stay under house arrest for a year while pardoning the known collaborators. Seifu as a result became an increasingly outspoken critic of Haile Selassie and went as far as aiding the patriot from Gojjam,
Belay Zeleke with whom he had contact during the resistance, to escape from prison and furnishing him with funds to stay underground to avoid his inevitable elimination. Seifu was responsible for arming Gojjam before the fascist invasion and supported the patriots during the resistance. After the capture of
Belay Zeleke, Seifu was implicated and ordered to remain under house arrest indefinitely while
Belay Zeleke, his brother and other fellow patriots, friends and relatives who rebelled against the emperor were hanged. As a result of his defiance, the expansive estates he lost to Leul Ras
Hailu Tekle Haymanot during the occupation was denied to him under the provisions that the prince's wealth has been confiscated and transferred to the Ministry of Treasury and part of the prime Addis Ababa property he lost to the Italians which was developed into the iconic Ras Hotel, effectively became the property of the government. His last appointment was as an administrator of the Ethiopian Orthodox Church, only to get caught up in another feud with the emperor for the comments he made during a dinner party in the presence of people close to Emperor Haile Selassie about the coup d'état attempt of the 1950s by a group of young German-educated Ethiopians to limit the power of the monarch through a constitutional monarchy. According to H.E. Ambassador Ahadu Sabure, Seifu initially disagreed about the coup attempt but said if it was him who tried, he could have made a successful coup by pointing out the steps that should have been taken. The emperor was told about the conversation and called the prominent businessman Ato Bekele Shebah who was present during the conversation. Bekele told the emperor that Seifu didn't suggest another coup or was he involved in any but simply commented on the situation. Seifu would later be called to the palace to explain his comments which he didn't deny making them but told the emperor his rule is responsible for any grievances resulting in such attempts. Offended, the emperor banished him to his Ambo country house and farm where he died from complications of diabetes and high blood pressure in Addis Ababa shortly after. His funeral was attended by his lifelong friend The Crown Prince Asfaw Wossen
Amha Selassie,
Princess Tenagnework and several members of the Imperial family, military leaders and the nobility. The mass was conducted by His Holiness
Abuna Basilios, Patriarch of the Ethiopian Orthodox Church. He was laid to rest at the Emmanuel Ethiopian Orthodox Church which he served as its main benefactor. ==Personal life==