A seal assembly (300; 500; 700) for use in a bearing compartment (230; 430; 630) of a gas turbine engine , the seal assembly (300; 500; 700) comprising: a seal carrier (330; 530; 730); a compliant structure (320; 520; 720) comprising a first end (322; 522; 722) and a second end (324; 524; 724), wherein the first end (322; 522; 722) is coupled to the seal carrier (330; 530; 730); a support structure (310; 510; 710) coupled to the second end (324; 524; 724); a seal coupled to a first carrier contact surface (332; 532; 732) of the seal carrier (330; 530; 730); and a seal plate disposed adjacent to a nose of the seal , wherein the compliant structure (320; 520; 720) applies a mechanical load to the seal to press the seal against the seal plate , wherein the compliant structure (320; 520; 720) is integral with at least one of the seal carrier (330; 530; 730) and the support structure (310; 510; 710), characterised in that : the compliant structure (320; 520; 720), seal carrier (330; 530; 730) and support structure (310; 510; 710) comprise a steel alloy or a titanium alloy, the compliant structure (320; 520; 720) and the at least one of the seal carrier (330; 530; 730) and the support structure (310; 520; 720) are additively manufactured as an integral piece, the seal plate is rotatable about an axis of rotation , and, relative to the axis of rotation , the compliant structure is disposed radially outward of the seal and a portion of the seal carrier , and the portion of the seal carrier is disposed radially between the compliant structure and the seal . a seal carrier (330; 530; 730); a compliant structure (320; 520; 720) comprising a first end (322; 522; 722) and a second end (324; 524; 724), wherein the first end (322; 522; 722) is coupled to the seal carrier (330; 530; 730); a support structure (310; 510; 710) coupled to the second end (324; 524; 724); a seal coupled to a first carrier contact surface (332; 532; 732) of the seal carrier (330; 530; 730); and a seal plate disposed adjacent to a nose of the seal , wherein the compliant structure (320; 520; 720) applies a mechanical load to the seal to press the seal against the seal plate , wherein the compliant structure (320; 520; 720) is integral with at least one of the seal carrier (330; 530; 730) and the support structure (310; 510; 710), characterised in that : the compliant structure (320; 520; 720), seal carrier (330; 530; 730) and support structure (310; 510; 710) comprise a steel alloy or a titanium alloy, the compliant structure (320; 520; 720) and the at least one of the seal carrier (330; 530; 730) and the support structure (310; 520; 720) are additively manufactured as an integral piece, the seal plate is rotatable about an axis of rotation , and, relative to the axis of rotation , the compliant structure is disposed radially outward of the seal and a portion of the seal carrier , and the portion of the seal carrier is disposed radially between the compliant structure and the seal . the compliant structure (320; 520; 720), seal carrier (330; 530; 730) and support structure (310; 510; 710) comprise a steel alloy or a titanium alloy, the compliant structure (320; 520; 720) and the at least one of the seal carrier (330; 530; 730) and the support structure (310; 520; 720) are additively manufactured as an integral piece, the seal plate is rotatable about an axis of rotation , and, relative to the axis of rotation , the compliant structure is disposed radially outward of the seal and a portion of the seal carrier , and the portion of the seal carrier is disposed radially between the compliant structure and the seal . <EOS>