He then transitioned into various educational roles and technical training, ultimately leading the countermeasure office in the Naval Staff's Signal Intelligence Department.
[2] Thereafter, he served in the gunnery and combat department on board destroyers and torpedo boats[4] during sea deployments in the Coastal Fleet from 1959 to 1964.
He attended schools (both as a teacher and a student) from 1964 to 1969, participated in the higher technical course at the Swedish Armed Forces Staff College from 1967 to 1969, and served in the Coastal Fleet from 1969 to 1971.
[2] As his first assignment after completing the Navy Program's Technical Course (Marinlinjens tekniska kurs, MTK), Hultman became the head of the countermeasure office in the Naval Staff's Signal Intelligence Department.
His main task there was, in collaboration with the Swedish National Defence Research Institute, to develop a TTEM (Tactical, Organizational, and Economic Objective) for a strip countermeasure system for surface combatants, which he had proposed in his individual report.
In addition to the usual administrative duties at this level, he was tasked with being the navy's project manager for the new analog fire control system ARTE 722 for the new Spica II-class, which was later modified to the Norrköping-class missile boat.
This role involved closely monitoring and directing the development of this large fire control system in collaboration with the supplier Peab as the responsible representative for the customer.
The next step in the development occurred when the Swedish government rejected the Supreme Commander's request to acquire Harpoon in the autumn of 1978 and instead ordered the Supreme Commander and FMV to investigate the possibility of acquiring a naval missile system from the Swedish defence industry jointly for the navy and the air force.
The result was a decision to procure a joint missile system for the navy and air force from Saab AB, designated RBS 15.
[11] In December 1982, Hultman was appointed head of the Technical Administration at the East Coast Naval Base at Muskö.